Open-Meteo MCP Server

Weather Forecast

weather_forecast

Read-onlyIdempotent

Retrieve weather forecast data for specific coordinates via the Open-Meteo API. Supports hourly and daily variables with automatic model selection.

Instructions

Get weather forecast data for coordinates using Open-Meteo API. Supports hourly and daily data with various weather variables. When no models parameter is provided, the API automatically selects the best model for the given location (recommended). Only one model per request is supported — for multi-model comparison, use provider-specific tools with parallel calls.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`tilt`	No	Solar panel tilt in degrees (0 = flat, 90 = vertical); with `azimuth`, sets global_tilted_irradiance.
`daily`	No
`hourly`	No
`models`	No
`azimuth`	No	Solar panel azimuth in degrees (0 = south, -90 = east, 90 = west, ±180 = north); used with `tilt`.
`current`	No	Variables to return for the current time.
`end_date`	No	Date in YYYY-MM-DD format.
`end_hour`	No	Timestamp YYYY-MM-DDTHH:MM; hourly-precision alternative to start_date/end_date.
`latitude`	Yes
`timezone`	No	IANA time zone (e.g. "Europe/Paris"), or "auto" for the location's own. Default GMT.
`longitude`	Yes
`past_days`	No	Days before today to include, in addition to the forecast.
`past_hours`	No	Hours before now to include; alternative to `past_days`.
`start_date`	No	Date in YYYY-MM-DD format.
`start_hour`	No	Timestamp YYYY-MM-DDTHH:MM; hourly-precision alternative to start_date/end_date.
`timeformat`	No		iso8601
`minutely_15`	No	Variables to return at 15-minute resolution.
`forecast_days`	No	Days to forecast, starting today.
`cell_selection`	No	Grid cell to use near a coastline: prefer "land", prefer "sea", or the "nearest" cell.
`forecast_hours`	No	Hours to forecast; alternative to `forecast_days`.
`current_weather`	No	Legacy current-conditions summary; prefer `current`.
`wind_speed_unit`	No		kmh
`temperature_unit`	No		celsius
`precipitation_unit`	No		mm

Schema Changelog

Changes observed during successful MCP inspections.

Changed34 schema fields changedv2.5.0Sep 28, 2026

addedInput schema / $schema

Added value: +"http://json-schema.org/draft-07/schema#"

addedInput schema / additionalProperties
```
Added value: +false
```

addedInput schema / properties / azimuth

Added value: +{
+  "description": "Solar panel azimuth in degrees (0 = south, -90 = east, 90 = west, ±180 = north); used with `tilt`.",
+  "maximum": 180,
+  "minimum": -180,
+  "type": "number"
+}

addedInput schema / properties / cell_selection

Added value: +{
+  "description": "Grid cell to use near a coastline: prefer \"land\", prefer \"sea\", or the \"nearest\" cell.",
+  "enum": [
+    "land",
+    "sea",
+    "nearest"
+  ],
+  "type": "string"
+}

addedInput schema / properties / current

Added value: +{
+  "description": "Variables to return for the current time.",
+  "items": {
+    "anyOf": [
+      {
+        "enum": [
+          "temperature_2m",
+          "relative_humidity_2m",
+          "dewpoint_2m",
+          "dew_point_2m",
+          "apparent_temperature",
+          "precipitation_probability",
+          "precipitation",
+          "rain",
+          "showers",
+          "snowfall",
+          "snow_depth",
+          "weather_code",
+          "pressure_msl",
+          "surface_pressure",
+          "cloud_cover",
+          "cloud_cover_low",
+          "cloud_cover_mid",
+          "cloud_cover_high",
+          "visibility",
+          "evapotranspiration",
+          "et0_fao_evapotranspiration",
+          "vapour_pressure_deficit",
+          "wind_speed_10m",
+          "wind_speed_80m",
+          "wind_speed_120m",
+          "wind_speed_180m",
+          "wind_direction_10m",
+          "wind_direction_80m",
+          "wind_direction_120m",
+          "wind_direction_180m",
+          "wind_gusts_10m",
+          "temperature_80m",
+          "temperature_120m",
+          "temperature_180m",
+          "soil_temperature_0cm",
+          "soil_temperature_6cm",
+          "soil_temperature_18cm",
+          "soil_temperature_54cm",
+          "soil_moisture_0_to_1cm",
+          "soil_moisture_1_to_3cm",
+          "soil_moisture_3_to_9cm",
+          "soil_moisture_9_to_27cm",
+          "soil_moisture_27_to_81cm",
+          "uv_index",
+          "uv_index_clear_sky",
+          "is_day",
+          "sunshine_duration",
+          "wet_bulb_temperature_2m",
+          "total_column_integrated_water_vapour",
+          "cape",
+          "lifted_index",
+          "convective_inhibition",
+          "freezing_level_height",
+          "boundary_layer_height_pbl",
+          "shortwave_radiation",
+          "direct_radiation",
+          "diffuse_radiation",
+          "direct_normal_irradiance",
+          "global_tilted_irradiance",
+          "terrestrial_radiation",
+          "shortwave_radiation_instant",
+          "direct_radiation_instant",
+          "diffuse_radiation_instant",
+          "direct_normal_irradiance_instant",
+          "global_tilted_irradiance_instant",
+          "terrestrial_radiation_instant",
+          "wind_speed_200m",
+          "wind_direction_200m",
+          "snow_height",
+          "updraft",
+          "lightning_potential"
+        ],
+        "type": "string"
+      },
+      {
+        "description": "Pressure-level variable <variable>_<level>hPa, e.g. \"temperature_850hPa\".",
+        "pattern": "^(temperature|relative_humidity|cloud_cover|wind_speed|wind_direction|geopotential_height|vertical_velocity)_(30|50|70|100|150|200|250|300|400|500|600|700|800|850|900|925|950|975|1000)hPa$",
+        "type": "string"
+      }
+    ]
+  },
+  "type": "array"
+}

changedInput schema / properties / current_weather / description

Previous value: -"Include current weather conditions"New value: +"Legacy current-conditions summary; prefer `current`."

removedInput schema / properties / daily / description

Removed value: -"Daily weather variables to retrieve"

changedInput schema / properties / daily / items / enum

Previous value: -[
-  "temperature_2m_max",
-  "temperature_2m_min",
-  "apparent_temperature_max",
-  "apparent_temperature_min",
-  "precipitation_sum",
-  "weather_code",
-  "sunrise",
-  "sunset",
-  "wind_speed_10m_max",
-  "wind_gusts_10m_max",
-  "wind_direction_10m_dominant",
-  "shortwave_radiation_sum",
-  "uv_index_max"
-]New value: +[
+  "weather_code",
+  "temperature_2m_max",
+  "temperature_2m_min",
+  "apparent_temperature_max",
+  "apparent_temperature_min",
+  "sunrise",
+  "sunset",
+  "daylight_duration",
+  "sunshine_duration",
+  "uv_index_max",
+  "uv_index_clear_sky_max",
+  "rain_sum",
+  "showers_sum",
+  "snowfall_sum",
+  "precipitation_sum",
+  "precipitation_hours",
+  "precipitation_probability_max",
+  "wind_speed_10m_max",
+  "wind_gusts_10m_max",
+  "wind_direction_10m_dominant",
+  "shortwave_radiation_sum",
+  "et0_fao_evapotranspiration",
+  "temperature_2m_mean",
+  "apparent_temperature_mean",
+  "cape_mean",
+  "cape_max",
+  "cape_min",
+  "cloud_cover_mean",
+  "cloud_cover_max",
+  "cloud_cover_min",
+  "dewpoint_2m_mean",
+  "dewpoint_2m_max",
+  "dewpoint_2m_min",
+  "dew_point_2m_mean",
+  "dew_point_2m_max",
+  "dew_point_2m_min",
+  "et0_fao_evapotranspiration_sum",
+  "growing_degree_days_base_0_limit_50",
+  "leaf_wetness_probability_mean",
+  "leaf_wetness_probability_max",
+  "leaf_wetness_probability_min",
+  "precipitation_probability_mean",
+  "precipitation_probability_min",
+  "relative_humidity_2m_mean",
+  "relative_humidity_2m_max",
+  "relative_humidity_2m_min",
+  "snowfall_water_equivalent_sum",
+  "pressure_msl_mean",
+  "pressure_msl_max",
+  "pressure_msl_min",
+  "surface_pressure_mean",
+  "surface_pressure_max",
+  "surface_pressure_min",
+  "updraft_max",
+  "visibility_mean",
+  "visibility_max",
+  "visibility_min",
+  "wind_gusts_10m_mean",
+  "wind_gusts_10m_min",
+  "wind_speed_10m_mean",
+  "wind_speed_10m_min",
+  "wet_bulb_temperature_2m_mean",
+  "wet_bulb_temperature_2m_max",
+  "wet_bulb_temperature_2m_min",
+  "vapour_pressure_deficit_max"
+]

addedInput schema / properties / end_date

Added value: +{
+  "description": "Date in YYYY-MM-DD format.",
+  "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
+  "type": "string"
+}

addedInput schema / properties / end_hour

Added value: +{
+  "description": "Timestamp YYYY-MM-DDTHH:MM; hourly-precision alternative to start_date/end_date.",
+  "pattern": "^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}$",
+  "type": "string"
+}

removedInput schema / properties / forecast_days / default
```
Removed value: -7
```

changedInput schema / properties / forecast_days / description

Previous value: -"Number of forecast days"New value: +"Days to forecast, starting today."

addedInput schema / properties / forecast_hours

Added value: +{
+  "description": "Hours to forecast; alternative to `forecast_days`.",
+  "maximum": 9007199254740991,
+  "minimum": 0,
+  "type": "integer"
+}

removedInput schema / properties / hourly / description

Removed value: -"Hourly weather variables to retrieve"

addedInput schema / properties / hourly / items / anyOf

Added value: +[
+  {
+    "enum": [
+      "temperature_2m",
+      "relative_humidity_2m",
+      "dewpoint_2m",
+      "dew_point_2m",
+      "apparent_temperature",
+      "precipitation_probability",
+      "precipitation",
+      "rain",
+      "showers",
+      "snowfall",
+      "snow_depth",
+      "weather_code",
+      "pressure_msl",
+      "surface_pressure",
+      "cloud_cover",
+      "cloud_cover_low",
+      "cloud_cover_mid",
+      "cloud_cover_high",
+      "visibility",
+      "evapotranspiration",
+      "et0_fao_evapotranspiration",
+      "vapour_pressure_deficit",
+      "wind_speed_10m",
+      "wind_speed_80m",
+      "wind_speed_120m",
+      "wind_speed_180m",
+      "wind_direction_10m",
+      "wind_direction_80m",
+      "wind_direction_120m",
+      "wind_direction_180m",
+      "wind_gusts_10m",
+      "temperature_80m",
+      "temperature_120m",
+      "temperature_180m",
+      "soil_temperature_0cm",
+      "soil_temperature_6cm",
+      "soil_temperature_18cm",
+      "soil_temperature_54cm",
+      "soil_moisture_0_to_1cm",
+      "soil_moisture_1_to_3cm",
+      "soil_moisture_3_to_9cm",
+      "soil_moisture_9_to_27cm",
+      "soil_moisture_27_to_81cm",
+      "uv_index",
+      "uv_index_clear_sky",
+      "is_day",
+      "sunshine_duration",
+      "wet_bulb_temperature_2m",
+      "total_column_integrated_water_vapour",
+      "cape",
+      "lifted_index",
+      "convective_inhibition",
+      "freezing_level_height",
+      "boundary_layer_height_pbl",
+      "shortwave_radiation",
+      "direct_radiation",
+      "diffuse_radiation",
+      "direct_normal_irradiance",
+      "global_tilted_irradiance",
+      "terrestrial_radiation",
+      "shortwave_radiation_instant",
+      "direct_radiation_instant",
+      "diffuse_radiation_instant",
+      "direct_normal_irradiance_instant",
+      "global_tilted_irradiance_instant",
+      "terrestrial_radiation_instant",
+      "wind_speed_200m",
+      "wind_direction_200m",
+      "snow_height",
+      "updraft",
+      "lightning_potential"
+    ],
+    "type": "string"
+  },
+  {
+    "description": "Pressure-level variable <variable>_<level>hPa, e.g. \"temperature_850hPa\".",
+    "pattern": "^(temperature|relative_humidity|cloud_cover|wind_speed|wind_direction|geopotential_height|vertical_velocity)_(30|50|70|100|150|200|250|300|400|500|600|700|800|850|900|925|950|975|1000)hPa$",
+    "type": "string"
+  }
+]

removedInput schema / properties / hourly / items / enum

Removed value: -[
-  "temperature_2m",
-  "relative_humidity_2m",
-  "dewpoint_2m",
-  "apparent_temperature",
-  "pressure_msl",
-  "surface_pressure",
-  "cloud_cover",
-  "wind_speed_10m",
-  "wind_direction_10m",
-  "wind_gusts_10m",
-  "shortwave_radiation",
-  "precipitation",
-  "rain",
-  "snowfall",
-  "precipitation_probability",
-  "weather_code",
-  "visibility",
-  "uv_index"
-]

removedInput schema / properties / hourly / items / type
```
Removed value: -"string"
```
removedInput schema / properties / latitude / description
```
Removed value: -"Latitude in WGS84 coordinate system"
```
removedInput schema / properties / longitude / description
```
Removed value: -"Longitude in WGS84 coordinate system"
```

addedInput schema / properties / minutely_15

Added value: +{
+  "description": "Variables to return at 15-minute resolution.",
+  "items": {
+    "enum": [
+      "temperature_2m",
+      "relative_humidity_2m",
+      "dew_point_2m",
+      "apparent_temperature",
+      "precipitation",
+      "rain",
+      "snowfall",
+      "snowfall_height",
+      "freezing_level_height",
+      "sunshine_duration",
+      "weather_code",
+      "wind_speed_10m",
+      "wind_speed_80m",
+      "wind_speed_100m",
+      "wind_direction_10m",
+      "wind_direction_80m",
+      "wind_direction_100m",
+      "wind_gusts_10m",
+      "visibility",
+      "cape",
+      "lightning_potential",
+      "is_day"
+    ],
+    "type": "string"
+  },
+  "type": "array"
+}

addedInput schema / properties / models

Added value: +{
+  "enum": [
+    "best_match",
+    "ecmwf_ifs04",
+    "ecmwf_ifs",
+    "ecmwf_ifs025",
+    "ecmwf_aifs025",
+    "ecmwf_aifs025_single",
+    "ecmwf_ifs_europe_ensemble_mean",
+    "ecmwf_aifs_europe_ensemble_mean",
+    "cma_grapes_global",
+    "bom_access_global",
+    "gfs_seamless",
+    "ncep_gfs_seamless",
+    "ncep_gfs_global",
+    "ncep_hrrr_conus",
+    "ncep_hrrr_conus_15min",
+    "ncep_nbm_conus",
+    "ncep_nam_conus",
+    "ncep_gfs_graphcast025",
+    "ncep_aigfs025",
+    "ncep_hgefs025_ensemble_mean",
+    "ncep_aigefs025_ensemble_mean",
+    "jma_seamless",
+    "jma_msm",
+    "jma_msm_upper_level",
+    "jma_gsm",
+    "kma_seamless",
+    "kma_ldps",
+    "kma_gdps",
+    "dwd_icon_seamless",
+    "dwd_icon_global",
+    "dwd_icon_eu",
+    "dwd_icon_d2",
+    "dwd_icon_d2_15min",
+    "icon_seamless",
+    "icon_global",
+    "icon_eu",
+    "icon_d2",
+    "gem_seamless",
+    "gem_global",
+    "gem_regional",
+    "gem_hrdps_continental",
+    "gem_hrdps_west",
+    "cmc_gem_seamless",
+    "cmc_gem_gdps",
+    "cmc_gem_rdps",
+    "cmc_gem_hrdps",
+    "cmc_gem_hrdps_west",
+    "meteofrance_seamless",
+    "meteofrance_arpege_world",
+    "meteofrance_arpege_europe",
+    "meteofrance_arome_france",
+    "meteofrance_arome_france0025",
+    "meteofrance_arome_france_hd",
+    "meteofrance_arome_france_15min",
+    "meteofrance_arome_france_hd_15min",
+    "meteofrance_arpege_world025",
+    "italia_meteo_arpae_icon_2i",
+    "metno_seamless",
+    "metno_nordic",
+    "knmi_seamless",
+    "knmi_harmonie_arome_europe",
+    "knmi_harmonie_arome_netherlands",
+    "dmi_seamless",
+    "dmi_harmonie_arome_europe",
+    "ukmo_seamless",
+    "ukmo_global_deterministic_10km",
+    "ukmo_uk_deterministic_2km",
+    "meteoswiss_icon_seamless",
+    "meteoswiss_icon_ch1",
+    "meteoswiss_icon_ch2",
+    "geosphere_seamless",
+    "geosphere_arome_austria",
+    "chmi_aladin_seamless",
+    "chmi_aladin_cz_1km",
+    "chmi_aladin_central_europe_2km"
+  ],
+  "type": "string"
+}

changedInput schema / properties / past_days / description

Previous value: -"Include past days data"New value: +"Days before today to include, in addition to the forecast."

removedInput schema / properties / past_days / enum
```
Removed value: -[
-  1,
-  2
-]
```
addedInput schema / properties / past_days / maximum
```
Added value: +92
```
addedInput schema / properties / past_days / minimum
```
Added value: +1
```

addedInput schema / properties / past_hours

Added value: +{
+  "description": "Hours before now to include; alternative to `past_days`.",
+  "maximum": 9007199254740991,
+  "minimum": 0,
+  "type": "integer"
+}

removedInput schema / properties / precipitation_unit / description
```
Removed value: -"Precipitation unit"
```

addedInput schema / properties / start_date

Added value: +{
+  "description": "Date in YYYY-MM-DD format.",
+  "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
+  "type": "string"
+}

addedInput schema / properties / start_hour

Added value: +{
+  "description": "Timestamp YYYY-MM-DDTHH:MM; hourly-precision alternative to start_date/end_date.",
+  "pattern": "^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}$",
+  "type": "string"
+}

removedInput schema / properties / temperature_unit / description
```
Removed value: -"Temperature unit"
```

addedInput schema / properties / tilt

Added value: +{
+  "description": "Solar panel tilt in degrees (0 = flat, 90 = vertical); with `azimuth`, sets global_tilted_irradiance.",
+  "maximum": 90,
+  "minimum": 0,
+  "type": "number"
+}

addedInput schema / properties / timeformat

Added value: +{
+  "default": "iso8601",
+  "enum": [
+    "iso8601",
+    "unixtime"
+  ],
+  "type": "string"
+}

changedInput schema / properties / timezone / description

Previous value: -"Timezone for timestamps (e.g., Europe/Paris, America/New_York)"New value: +"IANA time zone (e.g. \"Europe/Paris\"), or \"auto\" for the location's own. Default GMT."

removedInput schema / properties / wind_speed_unit / description
```
Removed value: -"Wind speed unit"
```

First observedv1.1.3Jan 31, 2026

TDQS

A3.9/5.0

Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=true, and destructiveHint=false, so the safety profile is covered. The description adds meaningful behavioral context: automatic best-model selection when `models` is omitted and the constraint that only one model per request is supported. It does not discuss rate limits or return format, but the annotations carry most of the burden.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is three tight sentences. It front-loads the core purpose and then moves to the key model-selection guidance, with zero filler or repetition. Every sentence earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a complex tool with 24 parameters, 2 required, and no output schema, the description leaves notable gaps. It does not describe the return format or how to interpret the output, and it provides little guidance on the many parameters like `tilt`, `azimuth`, date ranges, or units beyond what the schema already states. It handles model selection well but is not fully complete for an agent to invoke it confidently across all use cases.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 63%, which is moderate. The description only elaborates on the `models` parameter behavior (auto-selection and single-model constraint). For other parameters, it adds no semantics beyond what the schema already provides or omits. Given the moderate coverage gap, the description does not fully compensate, so the baseline of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a clear verb and resource: 'Get weather forecast data for coordinates using Open-Meteo API.' It mentions supports hourly and daily data with various variables, which is specific. However, it does not explicitly differentiate from the numerous provider-specific forecast siblings (e.g., gfs_forecast, ecmwf_forecast); the hint about 'provider-specific tools' implies this is a general wrapper, but that distinction is left implicit.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It gives explicit guidance on model selection: 'When no `models` parameter is provided, the API automatically selects the best model... (recommended)' and states 'Only one model per request is supported — for multi-model comparison, use provider-specific tools with parallel calls.' This covers when to use a specific model vs. auto-selection and names an alternative approach. It does not, however, clarify when to choose this tool over siblings like weather_archive or air_quality.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Deploy Server

Weather Forecast

Instructions

Input Schema

Schema Changelog

TDQS

Other Tools