Open-Meteo Weather

How to Use This API

1. Current Weather + Hourly Forecast (Berlin, Germany)

Get both current conditions and 7-day hourly forecast for Berlin (lat=52.52, lon=13.41):

https://api.open-meteo.com/v1/forecast?latitude=52.52&longitude=13.41¤t=temperature_2m,wind_speed_10m,relative_humidity_2m&hourly=temperature_2m,precipitation_probability,wind_speed_10m&timezone=Europe/Berlin

The current parameter returns the latest observation. hourly returns 168 data points (7 days × 24 hours). You can list any combination of weather variables separated by commas.

2. Historical Weather (New York, specific date range)

Retrieve historical data for New York (lat=40.71, lon=-74.01) for a specific date range:

https://api.open-meteo.com/v1/forecast?latitude=40.71&longitude=-74.01&start_date=2026-01-01&end_date=2026-01-31&daily=temperature_2m_max,temperature_2m_min,precipitation_sum

The daily parameter aggregates by day. start_date and end_date switch the API into historical mode.

3. JavaScript — Current + Hourly for Tokyo

const base = 'https://api.open-meteo.com/v1/forecast';
const params = new URLSearchParams({
  latitude: 35.68,
  longitude: 139.69,
  current: 'temperature_2m,weather_code,wind_speed_10m',
  hourly: 'temperature_2m,precipitation',
  timezone: 'Asia/Tokyo'
});

fetch(base + '?' + params)
  .then(r => r.json())
  .then(d => {
    console.log('Current temp:', d.current.temperature_2m, '°C');
    console.log('Hourly:', d.hourly.time.map((t, i) =>
      t + ': ' + d.hourly.temperature_2m[i] + '°C'));
  });

4. Python — Daily Aggregates for London

import requests

params = {
    'latitude': 51.51,
    'longitude': -0.13,
    'daily': 'temperature_2m_max,temperature_2m_min,sunrise,sunset,uv_index_max',
    'timezone': 'Europe/London'
}
resp = requests.get('https://api.open-meteo.com/v1/forecast', params=params)
data = resp.json()

for day in range(len(data['daily']['time'])):
    print(f"{data['daily']['time'][day]}: "
          f"{data['daily']['temperature_2m_min'][day]}–{data['daily']['temperature_2m_max'][day]}°C, "
          f"UV {data['daily']['uv_index_max'][day]}")