Log inSign up
REST APIWeather

Aviation Weather Center METAR Data API

Aviation Weather Center METAR Data API is a rest api from NOAA / National Weather Service Aviation Weather Center providing weather data. Free U.S. government REST API serving raw and parsed METAR aviation surface observations (temperature, dewpoint, wind, etc.) by ICAO station ID, updated hourly with special off-hour reports. A Polymarket bot would use it to read the exact official observations that "NYC high temp" and other weather markets resolve against (e.g. KNYC, KLGA, KNYC max-temp fields).

At a glance

ProviderNOAA / National Weather Service Aviation Weather Center
TypeREST API
CategoryWeather
Real-timeNo — request/response
AuthNone — open endpoint
PricingFree (U.S. government / NOAA public data, no API key) — Free: public access, no API key, no account required, Rate limited to 100 requests/minute (excess temporarily blocked), Most endpoints return up to 400 entries; use minutely cache files for bulk pulls

What data it provides

  • Per-station METAR by ICAO ID (e.g. KNYC, KLGA) via /api/data/metar?ids=...
  • temp and dewp fields plus maxT24/minT24 (24-hour high/low temperature extremes)
  • Wind (wdir/wspd), visibility, altimeter, sea-level pressure, sky cover/clouds
  • Raw METAR text (rawOb) plus observation/receipt/report timestamps
  • Multiple formats: raw text, JSON, GeoJSON, CSV, XML, IWXXM
  • Also TAF forecasts, PIREPs, SIGMETs, station/airport metadata endpoints

Features

  • Rate limit: 100 requests/minute; custom User-Agent and spacing recommended
  • History depth: up to ~15 days of past observations queryable (1-96h range presets in UI)
  • Update frequency: hourly METARs plus off-cycle SPECI special reports; cache files refresh once per minute
  • Coverage: global ICAO-station METAR network (thousands of stations)
  • No SDK required - plain HTTP GET with query params; OpenAPI spec published
  • Minutely pre-generated cache files for full-dataset bulk access without per-call queries

Links

Use it in a bot

Other weather data sources

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.
Join Discord