https://api.openweathermap.org/data/2.5/weather?lat=35.68&lon=139.76&appid=YOUR_API_KEY import requests API_KEY = "your_api_key_here" city = "Tokyo" url = f"http://api.openweathermap.org/data/2.5/weather?q=city&appid=API_KEY&units=metric"
In the world of application development, integrating real-time weather data has become a standard requirement—from fitness apps planning outdoor runs to logistics companies rerouting shipments around storms. OpenWeatherMap provides one of the most popular and robust APIs for this purpose. openweathermapapi
"coord": "lon": -122.08, "lat": 37.39 , "weather": [ "id": 800, "main": "Clear", "description": "clear sky", "icon": "01d" ], "main": "temp": 282.55, "feels_like": 281.86, "temp_min": 280.37, "temp_max": 284.26, "pressure": 1023, "humidity": 100 , "wind": "speed": 1.5, "deg": 350 , "dt": 1560350645, "sys": "country": "US", "sunrise": 1560343627, "sunset": 1560396563 , "timezone": -25200, "name": "Mountain View" https://api
| API | Strengths | | :--- | :--- | | | Free tier includes 1M calls/month; simple JSON structure. | | Visual Crossing | Excellent for historical data (50+ years) and business analytics. | | Tomorrow.io | Hyperlocal forecasts (1 km resolution) and weather intelligence for logistics. | | National Weather Service (US only) | Completely free but only for US locations. | Final Thoughts The OpenWeatherMap API is a reliable, well‑documented solution for adding weather intelligence to any application. Its free tier is generous enough for prototypes and small projects, while the paid plans offer enterprise‑grade reliability and additional data like air quality and minute‑by‑minute precipitation. | | Visual Crossing | Excellent for historical
Sign up for a free API key, try the /weather endpoint in your terminal with curl , and start building something useful. The clouds are yours to forecast. ☁️ Have questions or an interesting project built with OpenWeatherMap? Share your experience in the comments below.
| API Product | Description | Typical Use Case | | :--- | :--- | :--- | | | Real-time conditions (temp, humidity, wind, pressure) plus brief descriptions (e.g., "light rain"). | Displaying a live weather widget. | | 5-Day Weather Forecast | 3-hour interval forecasts for the next 5 days (40 data points). | Trip planning, event scheduling. | | Weather Maps | Tile layers (precipitation, clouds, pressure) for use with Leaflet or Google Maps. | Building custom radar visualizations. | | Historical Weather | Archived data for specific dates or time ranges (up to 40+ years). | Climate research, analytics. | | Air Pollution API | Current, forecasted, and historical data for CO, NO2, O3, PM2.5, and PM10. | Health and outdoor activity apps. | | One Call API | A single endpoint delivering current, minute‑by‑minute (1 hour), hourly (48h), daily (7 days), and air pollution data. | Reducing API calls and simplifying code. | API Response Example (Current Weather) A typical JSON response for a city looks like this: