Guide · Agent skill
How to use the Weather Lookup agent skill (weather)
Updated · written with AI from the project's own documentation and checked against our catalogue data
The weather agent skill lets an AI agent answer everyday weather questions for any location, such as current conditions, whether it will rain, or a short forecast. It works by running curl commands against wttr.in, a public weather site, so no API key is needed. This guide explains what agent skills are, how to install this one, how to ask for weather in natural language, and what the skill does not cover.
Weather Lookupspinabot/brigade · MIT Download the skill Quick start
- 1Download the ZIP. Download the weather skill ZIP from this page.
- 2Unzip the skill. Unzip the file so you have a weather folder containing SKILL.md.
- 3Place it in the skills folder. Move the folder to ~/.claude/skills/ for personal use, or to .claude/skills/ inside a project.
- 4Or upload it in the Claude apps. In the Claude apps, go to Settings → Capabilities → Skills and upload the skill.
- 5Check curl is installed. The skill requires the curl command-line tool. Confirm it is available on your machine.
- 6Ask a weather question. Ask your agent something like 'What's the weather in London?', including a city, region, or airport code.
What an agent skill is and what this one does
An agent skill is a folder containing a SKILL.md file with instructions that an AI agent can load when a task matches the skill's description. The agent reads those instructions and follows them, which can include running commands on your computer.
Once installed, this weather skill lets the agent check current conditions, a one-line summary, a 1 to 3 day forecast, or a week forecast for a city, region, or airport code. It reads back the result in plain language.
- Current conditions and a one-line summary
- Forecasts for today, tomorrow, the day after, or a 3-day view
- A week forecast view
- Temperature, feels-like temperature, wind, humidity and precipitation
Install the weather skill
Download the weather skill ZIP from this page and unzip it. For a personal install, place the resulting weather folder in ~/.claude/skills/. For a single project, place it in that project's .claude/skills/ folder.
You can also upload the skill in the Claude apps under Settings → Capabilities → Skills.
The skill's files are listed as SKILL.md. The skill metadata lists curl as a required command-line tool. If curl is not installed, the skill's metadata includes an install entry using brew with the formula curl.
- Personal install: ~/.claude/skills/weather/
- Project install: .claude/skills/weather/ inside your project
- Claude apps: Settings → Capabilities → Skills, then upload
Ask for weather in natural language
You do not need to type commands. The skill is triggered when you ask about weather, temperature, or forecasts for a place. Always name a city, region, or airport code, because the skill's instructions say to include one in every query.
Examples of requests that match the skill's described use cases:
- What's the weather in London?
- Will it rain today or tomorrow in Lisbon?
- Temperature in New York right now
- Weather forecast for the week in Chicago
- Check the weather at ORD airport code
What the agent runs behind the scenes
The skill's instructions tell the agent to call wttr.in with curl. For example, a one-line summary for London uses the format=3 option. The agent picks the right command for your request: a quick summary for 'What's the weather?', a precipitation-only query for 'Will it rain?', or the v2 format for a weekend or week forecast.
Format codes available in the skill include %c for condition emoji, %t for temperature, %f for feels-like, %w for wind, %h for humidity, %p for precipitation and %l for location. The skill also documents a JSON output option (format=j1) and a PNG image option.
curl -s "wttr.in/London?format=%l:+%c+%t+(feels+like+%f),+%w+wind,+%h+humidity"Safety notes: scripts and network access
This skill runs scripts and uses the network. Its only network target in the source is wttr.in, and its commands are curl requests to that site. Read SKILL.md before installing any skill, so you know exactly what commands it can run.
The skill's notes say the service is rate limited, so the agent should not send repeated requests. Do not rely on this skill for safety decisions. The skill's own guidance says to check official NWS sources for severe weather alerts.
- Requires the curl command-line tool and Internet access to wttr.in
- Runs scripts and uses the network
- Rate limited: avoid spamming requests
Limits: what this skill does not cover
The skill is for everyday weather. It is not for historical weather data, climate analysis, hyper-local microclimate readings, official severe weather alerts, or aviation and marine weather. For those, the skill's guidance points to weather archives and APIs, local sensors, the NWS, and specialised services such as METAR.
- Historical weather data: use weather archives or APIs
- Climate trends: use specialised data sources
- Severe weather alerts: check official NWS sources
- Aviation or marine weather: use specialised services such as METAR
What people use it for
- Checking the forecast for a trip destination before you pack
- Getting a daily weather summary when you ask your agent for your morning update
- Asking whether it will rain tomorrow in a given city
- Quick temperature and wind checks for a city without opening a weather site
- Looking up the weather at an airport by its code, such as ORD
Frequently asked questions
How do I install the weather agent skill?
Download the ZIP from this page and unzip it. Place the weather folder in ~/.claude/skills/ for personal use, or in a project's .claude/skills/ folder. You can also upload it in the Claude apps under Settings → Capabilities → Skills.
Does the weather skill need an API key?
No. The skill's description says no API key is needed, and its notes say it uses wttr.in. It does require the curl command-line tool and Internet access.
Is the weather agent skill free?
The source is licensed under MIT. The source does not state any pricing, so check the listing on this page for licence details.
What data does the weather skill use?
The skill uses wttr.in to fetch current conditions and forecasts. Its description also mentions Open-Meteo as a source, but the commands in SKILL.md use wttr.in.
Can the weather skill give severe weather warnings?
No. The skill is not for severe weather alerts. Its guidance says to check official NWS sources for alerts, and you should do the same before making safety decisions.
Why does my weather query fail or return nothing?
The skill's notes say to always include a city, region, or airport code, and that the service is rate limited, so avoid repeated requests. Also confirm curl is installed and that the machine has Internet access to wttr.in.
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Our verdict
This skill suits people who want quick, no-signup weather checks for trip planning or daily summaries through their agent. It is not suitable for severe weather warnings, safety decisions, aviation or marine navigation, or historical and climate research, so pick a specialised service for those.
Download the skill