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weather

This skill retrieves current weather conditions and forecasts using two free APIs that require no authentication. It uses wttr.in for quick, human-readable weather summaries in various formats and Open-Meteo as a programmatic alternative for JSON-structured weather data. Use it when building chatbots or applications that need real-time temperature, conditions, humidity, wind, or forecast information without managing API keys.

View source Repository: nanobot

Install in Claude Code

Copy

git clone --depth 1 https://github.com/HKUDS/nanobot /tmp/weather && cp -r /tmp/weather/nanobot/skills/weather ~/.claude/skills/weather

Then start a new Claude Code session; the skill loads automatically.

Definition

SKILL.md

# Weather

Two free services, no API keys needed.

## wttr.in (primary)

Quick one-liner:
```bash
curl -s "wttr.in/London?format=3"
# Output: London: ⛅️ +8°C
```

Compact format:
```bash
curl -s "wttr.in/London?format=%l:+%c+%t+%h+%w"
# Output: London: ⛅️ +8°C 71% ↙5km/h
```

Full forecast:
```bash
curl -s "wttr.in/London?T"
```

Format codes: `%c` condition · `%t` temp · `%h` humidity · `%w` wind · `%l` location · `%m` moon

Tips:
- URL-encode spaces: `wttr.in/New+York`
- Airport codes: `wttr.in/JFK`
- Units: `?m` (metric) `?u` (USCS)
- Today only: `?1` · Current only: `?0`
- PNG: `curl -s "wttr.in/Berlin.png" -o /tmp/weather.png`

## Open-Meteo (fallback, JSON)

Free, no key, good for programmatic use:
```bash
curl -s "https://api.open-meteo.com/v1/forecast?latitude=51.5&longitude=-0.12&current_weather=true"
```

Find coordinates for a city, then query. Returns JSON with temp, windspeed, weathercode.

Docs: https://open-meteo.com/en/docs