weather

name	weather
description	Get current weather and forecasts (no API key required). Use when the user asks about the weather, temperature, forecast, wind, humidity, or climate conditions for a city or location. Fetches real-time weather data from free services using curl.
homepage	https://wttr.in/:help
metadata	{"otto":{"emoji":"🌤️","requires":{"bins":["curl"]}}}

Weather

Two free services, no API keys needed.

wttr.in (primary)

Quick one-liner:

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

Compact format:

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

Full forecast:

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 JSON

Free, no key, useful for programmatic weather data:

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