At a glance
ProviderNOAA National Weather Service
TypeREST API
CategoryWeather
Real-timeNo — request/response
AuthNone — open endpoint
PricingFree (public US government open data) — Free: all endpoints, no cost, open data for any purpose, No paid tiers — single free service for all users, Generous unpublished rate limit; over-limit returns 429 errors that clear within ~5s
What data it provides
- Station observations (current temperature, dewpoint, wind, humidity, conditions) via /stations/{id}/observations and /latest
- Multi-day textual forecasts via /gridpoints/{office}/{x},{y}/forecast (~2.5km grid)
- Hourly forecasts via /forecast/hourly
- Raw gridded forecast data (temperature, precipitation probability, etc.) via /gridpoints
- Point lookup /points/{lat},{lon} to resolve grid + forecast/observation URLs
- Active weather alerts/warnings via /alerts/active (CAP format)
Features
- Free authoritative US-only coverage (CONUS, AK, HI, territories); not global
- Auth via required descriptive User-Agent header (contact email recommended); no API key today
- Unpublished but generous rate limit; recommended ~1s delay between requests
- Output in GeoJSON, JSON-LD, plus CAP/ATOM for alerts via Accept header
- Recent observations available; deep historical climate records require NOAA NCEI/CDO, not this API
- No official SDK; widely used via plain HTTP and community Python/JS wrappers
Links
Use it in a bot
Other weather data sources
