Weather data loader (both history and forecast)

Fetch historical or forecast weather by location or coordinates via Open-Meteo. No API key needed.

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: --lat and --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).

bash

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).

bash

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