Weather Data Fetcher
Fetch daily weather (historical and forecast) by location name or coordinates via Open-Meteo. No API key needed. Scripts: fetch_historical.py (historical), fetch_forecast.py (forecast).
When to invoke
Use this skill when the user asks for:
- Historical weather data for a location or coordinates
- Weather forecast for the next days
- Precipitation or evapotranspiration data for garden planning
Location vs coordinates
Provide either:
- Location: positional or
--location/-l(e.g."Oslo, Norway") — geocoded via Open-Meteo - Coordinates:
--latand--lon(both required)
Days: --days N — history default 10 (max 30), forecast default 7 (max 15).
weather_fetch_historical
Run scripts/fetch_historical.py. Observed weather (Open-Meteo archive API). Default 10 days, max 30 (--days N).
python scripts/fetch_historical.py "Oslo, Norway"
python scripts/fetch_historical.py "Oslo, Norway" --days 20 --format json --kc 1.05
python scripts/fetch_historical.py --location "London, UK" --format csv
python scripts/fetch_historical.py --lat 59.91 --lon 10.75 --days 30
weather_fetch_forecast
Run scripts/fetch_forecast.py. Forecast weather. Default 7 days, max 15 (--days N).
python scripts/fetch_forecast.py "Oslo, Norway"
python scripts/fetch_forecast.py "Paris, France" --days 15 --format json --kc 1.0
python scripts/fetch_forecast.py --lat 59.91 --lon 10.75 --days 14 --format csv
Output columns
| Column | Description |
|---|---|
date |
YYYY-MM-DD |
temp |
Mean daily temperature (°C) |
precip |
Total daily precipitation (mm) |
et0_fao |
FAO-56 reference evapotranspiration (mm/day), after kc |
evaporation |
Estimated crop evaporation (mm) |
agg_precip |
Cumulative precipitation |
agg_evaporation |
Cumulative evapotranspiration |
kc (crop coefficient): multiplier applied to ET₀. Default 1.0.
Technical notes
- Historical: Open-Meteo archive API (observation/reanalysis); hourly → daily (temp = mean, precip/ET = sum).
- Forecast: Open-Meteo forecast API; same daily aggregation.
- Geocoding: location names resolved via Open-Meteo Geocoding API when not using
--lat/--lon.
Troubleshooting
| Symptom | Fix |
|---|---|
| Location not found | Try a simpler string (e.g. "Oslo") or use --lat and --lon |
| Provide either location or both --lat and --lon | Give a location (positional or --location) or both --lat and --lon |
| API failure | Check internet access; retry — Open-Meteo is free and usually reliable |