MCP Weather Server for Claude

What is MCP Weather Server for Claude?

An MCP server built with fastmcp that connects to the U.S. National Weather Service (NWS) API to provide real-time weather alerts and forecasts as tools for Claude.

How to use MCP Weather Server for Claude?

The server uses stdio transport and exposes two tools: get_alerts(state) to retrieve active weather alerts for a U.S. state, and get_forecast(latitude, longitude) to fetch a detailed forecast for any latitude/longitude pair.

Key features of MCP Weather Server for Claude

• Get active weather alerts by U.S. state.
• Fetch detailed forecasts by latitude and longitude.
• Asynchronous and fast using httpx and fastmcp.
• Built to serve as a Claude-compatible external tool.
• Uses the public National Weather Service API.

Use cases of MCP Weather Server for Claude

• Ask Claude for current weather alerts in a specific U.S. state.
• Get a detailed weather forecast for any location using coordinates.
• Integrate live weather data into Claude‑powered applications.

FAQ from MCP Weather Server for Claude

What data does this server access?

It accesses the U.S. National Weather Service API (weather.gov) for alerts and forecasts. Data is limited to the United States.

What are the dependencies?

The server requires fastmcp and httpx for async HTTP requests and MCP protocol handling.

What transport does it use?

It uses stdio transport, making it suitable for local or embedded MCP clients like Claude Desktop.

Is authentication required?

No. The NWS API is public and the server does not implement any authentication.

Are there any known limits?

Only U.S. weather data is available. The server relies on the NWS API, which may have rate limits not documented here.