Weather Forecast API

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What it does

Fetches current weather conditions and multi-day forecasts for any location worldwide using the free Open-Meteo API. No API key required.

Features

• Current conditions: Temperature, humidity, wind speed/direction/gusts, pressure, cloud cover, precipitation, weather description
• Daily forecasts: Up to 16 days with high/low temps, precipitation probability, UV index, sunrise/sunset, wind data
• Flexible input: City names (auto-geocoded) or latitude/longitude coordinates
• Multiple locations: Process many locations in a single run
• Temperature units: Celsius or Fahrenheit output
• WMO weather codes: Decoded into human-readable descriptions

How to use

1. Set locations: Enter city names or coordinates separated by semicolons

   • City names: New York; Tokyo; London
   • Coordinates: 37.7749,-122.4194; 35.6762,139.6503
   • Mixed: New York; 48.8566,2.3522; Sydney

2. Choose forecast length: Select 1-16 days of forecast data

3. Pick temperature unit: Celsius (default) or Fahrenheit

4. Run the Actor and download results from the dataset

Input example

{
"locations":"New York; Tokyo; London; Paris; Sydney",
"forecast_days":7,
"temperature_unit":"celsius"
}

Output example

{
"location":"New York, New York, United States",
"latitude":40.7143,
"longitude":-74.006,
"elevation_m":10.0,
"timezone":"America/New_York",
"timezone_abbreviation":"EDT",
"current_temperature_c":22.5,
"current_apparent_temperature_c":23.1,
"current_humidity_pct":65,
"current_weather_code":1,
"current_weather_description":"Mainly clear",
"current_is_day":true,
"current_precipitation_mm":0.0,
"current_cloud_cover_pct":25,
"current_pressure_msl_hpa":1015.2,
"current_wind_speed_kmh":12.3,
"current_wind_direction_deg":220,
"current_wind_gusts_kmh":25.1,
"forecast_days":[
{
"date":"2025-03-18",
"weather_code":2,
"weather_description":"Partly cloudy",
"temp_max_c":24.5,
"temp_min_c":15.2,
"sunrise":"2025-03-18T07:05",
"sunset":"2025-03-18T19:12",
"uv_index_max":6.5,
"precipitation_sum_mm":0.0,
"precipitation_probability_max":10,
"wind_speed_max_kmh":18.5,
"wind_gusts_max_kmh":35.0,
"wind_direction_dominant":210
}
],
"forecast_count":7,
"fetched_at":"2025-03-18T10:30:00.000000"
}

Notes

• Free API: Open-Meteo is completely free for non-commercial use. No API key needed.
• Rate limits: The API is generous but avoid excessive concurrent requests. The Actor processes locations sequentially.
• Geocoding: City names are automatically resolved to coordinates using Open-Meteo's geocoding service. If a city name is ambiguous, the most relevant result is used.
• Data freshness: Weather data is updated every 15 minutes by Open-Meteo.
• Coordinates: Use decimal degrees format (e.g., 37.7749,-122.4194). Latitude range: -90 to 90. Longitude range: -180 to 180.