OpenWeatherMap beginner's guide — what it is, how it works, when to use it
With any new API, the hardest part is figuring out what it actually does and where it's useful. Let's start there.
What is OpenWeatherMap?
Current weather, 5-day forecasts and alerts for 200,000+ cities globally, including Israel.
OpenWeatherMap is the most-used weather API among developers, largely thanks to its generous free tier (60 calls/min, 1M/month). It exposes hourly/daily forecasts, historical data, temperature/precipitation map tiles, and air quality. Set `lang=he` for Hebrew condition strings.
Who it's for
- Weather apps
- Agriculture dashboards
- Smart-home/IoT systems
- Blogs and news sites
A first example
Here is the shortest path to seeing something work:
curl "https://api.openweathermap.org/data/2.5/weather?q=Tel+Aviv&units=metric&lang=he&appid=YOUR_KEY"When to use it, when not to
OpenWeatherMap is a great fit for most of what it covers, but not every case. If you only need small, static data once or twice, it may be simpler to download and cache locally. For real products that need fresh data, the API is the way.