Base URL: Open-Meteo
Endpoint: https://api.open-meteo.com/v1/forecast
Description: Provides weather forecasts, including hourly temperature, precipitation, wind speed, etc.
No Auth Required: You can query the API without an API key.
Sample Query:

Latitude/Longitude: The example below uses 37.7749 (lat) and -122.4194 (lon) for San Francisco, CA.
Hourly Parameter: temperature_2m to retrieve hourly temperature data.
GET https://api.open-meteo.com/v1/forecast?latitude=37.7749&longitude=-122.4194&hourly=temperature_2m
This returns JSON like:

{
  "latitude": 37.7749,
  "longitude": -122.4194,
  "generationtime_ms": 0.266075,
  "utc_offset_seconds": 0,
  "timezone": "GMT",
  "hourly_units": {
    "time": "iso8601",
    "temperature_2m": "°C"
  },
  "hourly": {
    "time": ["2023-03-28T00:00","2023-03-28T01:00",...],
    "temperature_2m": [11.2, 10.9, ...]
  }
}