Open-Meteo

Archived high-resolution forecast runs. start_date and end_date are required and select the archived interval; same variable model as the forecast endpoint.

Current and previous forecast runs for a coordinate. Append _previous_dayN to a variable (e.g. temperature_2m_previous_day1) to fetch earlier runs.

Historical reanalysis weather. start_date and end_date (yyyy-mm-dd) are required; data available from 1940 to near-present.

Ensemble forecasts. models is required (e.g. icon_seamless, gfs_seamless, ecmwf_ifs025); each variable is returned per member (temperature_2m_member01, ...).

Long-range seasonal forecast. Request daily aggregates and/or six_hourly steps; interpolated hourly variables also available.

CMIP6 climate projections. start_date, end_date and models are required (e.g. MRI_AGCM3_2_S, EC_Earth3P_HR); request daily variables.

Air-quality forecast. Request pollutants and indices with hourly/current lists; control span with forecast_days (up to 7) and past_days.

Marine forecast. Request variables with hourly/daily/current lists; use length_unit=imperial for feet and forecast_days (up to 8).

GloFAS river discharge. Request daily discharge statistics; control horizon with forecast_days (up to 210) and past_days, or start_date/end_date.

Geocoding search. name is required; narrow with , <country>, countryCode, or count. Translated names via language.

Terrain elevation. Pass comma-separated latitude/longitude lists (positionally aligned) for up to 100 points.