REST APIWeather

OpenWeatherMap API

OpenWeatherMap API is a rest api from OpenWeather providing weather data. OpenWeather's REST weather API delivers global current conditions, minutely/hourly/daily forecasts, and station observations. A Polymarket weather bot can use it as a cheap, well-documented baseline temperature and precipitation feed to model markets like "NYC daily high temp."

At a glance

ProviderOpenWeather
TypeREST API
CategoryWeather
Real-timeNo — request/response
AuthAPI key
PricingFree tier (60 calls/min, 1M calls/mo) + One Call free 1,000 calls/day; paid plans from ~$40/mo — Free: 60 calls/min, 1M calls/mo (current weather, 5-day/3h forecast, air pollution, geocoding, maps), One Call API 4.0/3.0: first 1,000 calls/day free, then ~$0.0015/call (minutely/hourly/daily timeline + alerts), Startup: ~$40/mo (35 EUR) for higher rate limits + 16-day forecast, Professional / Expert: higher-volume tiers with bulk download, historical, Road Risk API

What data it provides

  • Current temperature, humidity, wind, pressure, clouds, precipitation by lat/lon or city
  • Minutely (1-min) precipitation nowcast for next 60 min (One Call)
  • Hourly forecast up to 48h/4 days and daily forecast up to 8/16 days
  • 5-day / 3-hour step forecast (free tier)
  • Government weather alerts via One Call API
  • Historical archives back to 1979 (paid History API)

Features

  • Global coverage worldwide by coordinates, city name, or ZIP
  • Free tier: 60 calls/min and 1M calls/month; per-tier call-rate limits scale up to 100k+/min
  • One Call API 4.0 unifies current/minutely/hourly/daily/alerts in one request
  • Historical data depth of 47+ years (since Jan 1979) on paid plans
  • Update frequency from every ~10 min to 2h depending on plan; 95%-99.9% availability SLA by tier
  • JSON/XML responses; wide ecosystem of community SDKs (Python, JS, etc.)

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.
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