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REST APIWeather

Open-Meteo Forecast API

Open-Meteo Forecast API is a rest api from Open-Meteo providing weather data. A free, no-key REST weather API that blends 40+ national weather models (GFS, ECMWF IFS, HRRR, DWD ICON, ARPEGE/AROME) into a single endpoint. A Polymarket weather bot can pull and ensemble per-location temperature and precipitation forecasts cheaply to price markets like "NYC high temp" without managing raw GRIB model data.

At a glance

ProviderOpen-Meteo
TypeREST API
CategoryWeather
Real-timeNo — request/response
AuthNone — open endpoint
PricingFree for non-commercial (10k calls/day); commercial paid from $29/mo — Free / Open-Access: non-commercial only, ~10,000 calls/day (300k/mo), Standard: $29/mo, 1M calls/mo, commercial use, 99.9% uptime, Professional: $99/mo, 5M calls/mo, commercial use, Enterprise: custom pricing, 50M+ calls/mo, priority support

What data it provides

  • Hourly + daily max/min temperature (2m), apparent temperature
  • Precipitation amount, probability, rain/showers/snowfall
  • Wind speed/direction/gusts at 10-180m, pressure, cloud cover
  • 15-minutely high-res data for Central Europe & North America (HRRR/ICON-D2/AROME)
  • Current conditions and per-model 'best match' auto-selection
  • Forecast horizon up to 16 days, plus separate ensemble & historical archive APIs

Features

  • Blends 40+ models: ECMWF IFS (9km), NOAA GFS/HRRR (3-25km), DWD ICON, Meteo-France ARPEGE/AROME
  • No API key required for the free non-commercial tier
  • Free tier rate-limited to ~10k calls/day, 300k/month
  • Update cadence from hourly (GFS/Meteo-France) to every 6h (ECMWF)
  • Companion APIs: Ensemble, Historical (1940+ ERA5 archive), Climate, Marine, Air Quality
  • Official client SDKs/examples for Python, TypeScript, and Swift; flatbuffer responses for bulk

Links

Use it in a bot

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Listed, not endorsed. Pricing and capabilities change without notice — check the provider's own documentation before you depend on anything here. Browse the full data resources directory or the strategy database.
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