Openmeteo Get Ensemble
openmeteo_get_ensembleProbabilistic ensemble weather forecast — up to 64 ensemble members, up to 35 days ahead with optional past_days (0–92). Most models end within 16 days; a model's columns are null past its horizon, and the response notice names where its data ends. Each member's values appear as separate columns named with a member suffix (e.g. temperature_2m_member01, temperature_2m_member02). Use the spread across members to compute exceedance probabilities, quantify forecast uncertainty, and build decision thresholds. Available models: ecmwf_ifs025_ensemble (51 members, global 0.25°), ecmwf_aifs025_ensemble (51, global 0.25°), ecmwf_ifs_europe_ensemble (51, Europe 9 km), ecmwf_aifs_europe_ensemble (51, Europe 31 km), google_weathernext2_ensemble (64, global 0.25°), ncep_gefs_seamless (31, global blend), ncep_gefs025 (31, global 0.25°), ncep_gefs05 (31, global 50 km, 35 days), ncep_aigefs025 (31, global 0.25°), icon_seamless_eps (20–40, global/Europe blend), icon_global_eps (40, global 26 km), icon_eu_eps (40, Europe 13 km), icon_d2_eps (20, Central Europe 2 km), gem_global_ensemble (21, global 0.25°), bom_access_global_ensemble (18, global 40 km), ukmo_global_ensemble_20km (18, global 20 km), ukmo_uk_ensemble_2km (3, UK 2 km), meteoswiss_icon_ch1_ensemble (11, Central Europe 1 km), meteoswiss_icon_ch2_ensemble (21, Central Europe 2 km). Omit models to use ecmwf_ifs025_ensemble. A regional model returns no data outside the area it covers; that comes back as an input error naming the coverage gap, not a transient failure, so pick a global model or move the coordinate inside the region rather than retrying. A model name this list does not carry is still sent upstream, so a newly added one keeps working. Large multi-member, multi-day pulls produce thousands of records and spill to a DataCanvas when canvas is enabled, returning canvas_id and table_name with truncated: true — inspect the staged columns with openmeteo_dataframe_describe, then query the full set with openmeteo_dataframe_query. With canvas disabled they return a bounded preview instead. At least one of hourly_variables or daily_variables is required.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| models | No | Ensemble model to use, one name: ecmwf_ifs025_ensemble (51 members, global 0.25°), ecmwf_aifs025_ensemble (51, global 0.25°), ecmwf_ifs_europe_ensemble (51, Europe 9 km), ecmwf_aifs_europe_ensemble (51, Europe 31 km), google_weathernext2_ensemble (64, global 0.25°), ncep_gefs_seamless (31, global blend), ncep_gefs025 (31, global 0.25°), ncep_gefs05 (31, global 50 km, 35 days), ncep_aigefs025 (31, global 0.25°), icon_seamless_eps (20–40, global/Europe blend), icon_global_eps (40, global 26 km), icon_eu_eps (40, Europe 13 km), icon_d2_eps (20, Central Europe 2 km), gem_global_ensemble (21, global 0.25°), bom_access_global_ensemble (18, global 40 km), ukmo_global_ensemble_20km (18, global 20 km), ukmo_uk_ensemble_2km (3, UK 2 km), meteoswiss_icon_ch1_ensemble (11, Central Europe 1 km), meteoswiss_icon_ch2_ensemble (21, Central Europe 2 km). Member counts include the control run. Omit or leave blank to use ecmwf_ifs025_ensemble. A name outside this list is sent upstream rather than rejected here, so a model Open-Meteo adds later still works. | |
| latitude | Yes | Latitude in decimal degrees. Use openmeteo_search_locations to resolve a place name to coordinates. | |
| timezone | No | IANA timezone (e.g., "America/Los_Angeles") or "auto" to use the location's local timezone. Default "auto". | auto |
| canvas_id | No | DataCanvas token for large multi-member queries. When a result is too large to return inline — driven by total payload size, so a wide member fan-out can spill at any row count — it spills to this canvas: pass the returned token to openmeteo_dataframe_describe to list the staged table and its per-member columns, then to openmeteo_dataframe_query to run SQL against it. Omit to create a fresh canvas. | |
| longitude | Yes | Longitude in decimal degrees. | |
| past_days | No | Include this many days of past ensemble data before today (0–92). Default 0. | |
| forecast_days | No | Forecast horizon in days (1–35). Default 7. Most ensemble models end within 16 days; past a model's horizon its columns come back null and the response notice names where its data ends. | |
| daily_variables | No | Daily variables to fetch across all ensemble members (e.g., ["temperature_2m_max", "temperature_2m_min", "precipitation_sum"]). Each variable appears as temperature_2m_max_member01, … Daily names only — an hourly name such as precipitation or temperature_2m belongs in hourly_variables and is rejected here; for a daily summary use its published aggregate (precipitation_sum, temperature_2m_max). At least one of hourly_variables or daily_variables required. | |
| wind_speed_unit | No | Wind speed unit. Default "kmh". | kmh |
| hourly_variables | No | Hourly variables to fetch across all ensemble members (e.g., ["temperature_2m", "precipitation", "wind_speed_10m"]). Each variable appears as temperature_2m_member01, temperature_2m_member02, … in the output. Hourly names only — a daily-only aggregate such as precipitation_sum or wind_speed_10m_max belongs in daily_variables and is rejected here; temperature_2m_max and temperature_2m_min are an exception, published here as 3-hourly aggregations as well as daily. At least one of hourly_variables or daily_variables required. | |
| temperature_unit | No | Temperature unit. Default "celsius". | celsius |
| precipitation_unit | No | Precipitation unit. Default "mm". | mm |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| daily | No | Per-day records with "time" (YYYY-MM-DD) + per-member columns (e.g., temperature_2m_max_member01). Absent when only hourly_variables were requested. When truncated, contains a preview only — query canvas_id for the full dataset when one is present. | |
| error | No | Present when the call failed. Absent on success. | |
| model | No | Ensemble model used — echoes the requested models parameter, or ecmwf_ifs025_ensemble when models was omitted or blank. | |
| hourly | No | Per-hour records with "time" (ISO 8601) + per-member columns for each requested variable (e.g., temperature_2m_member01, temperature_2m_member02). Absent when only daily_variables were requested. When truncated, contains a preview only — query canvas_id for the full dataset when one is present. | |
| notice | No | Everything this response needs to say beyond the data, composed into one advisory: variables the endpoint returned with the unit "undefined" across every member (a name the selected model does not carry); recognized variables whose requested window runs past the model's horizon, with the timestamps that do carry values; and, when the result spilled, either the canvas and table holding the full row set plus the two dataframe tools that read it, or — with DataCanvas disabled — why there is no canvas_id and how to reach the rows the preview omits. | |
| latitude | No | Snapped latitude (Open-Meteo snaps to nearest grid point) | |
| timezone | No | Resolved IANA timezone | |
| canvas_id | No | DataCanvas token for the staged full dataset. Present only when truncated is true AND DataCanvas is enabled (CANVAS_PROVIDER_TYPE=duckdb) — absent otherwise, in which case the preview is all this response carries. Pass to openmeteo_dataframe_describe to list the staged table and its per-member columns, then to openmeteo_dataframe_query to run SQL against it. | |
| elevation | No | Terrain elevation at grid point (meters) | |
| longitude | No | Snapped longitude | |
| truncated | No | True when the response was too large to return inline, so hourly and daily carry a bounded preview rather than the full set. With DataCanvas enabled the complete data is staged at canvas_id — every hourly and daily row, including any column the preview omits. With it disabled there is no canvas_id, and the omitted rows are reached only by narrowing the request. | |
| table_name | No | DuckDB table name for the staged data — use as the FROM target in openmeteo_dataframe_query SQL; openmeteo_dataframe_describe lists its columns, which is the only way to learn the per-member suffixes this request produced. Present only alongside canvas_id. | |
| daily_units | No | Variable → unit string for daily data. Absent when no daily_variables were requested. | |
| hourly_units | No | Variable → unit string for hourly data (e.g., {"temperature_2m_member01": "°C"}). Absent when no hourly_variables were requested. | |
| member_count | No | Number of distinct perturbed ensemble members in the response, counted from the _memberNN column suffixes. The unsuffixed base column (the control run) is not included in this count. | |
| record_count | No | Total number of records (hourly + daily rows) — the full upstream total when truncated is true, not the combined length of the hourly and daily previews. |