Get Weather Forecasts from Weather.gov
This GPT Action connects a Custom GPT to Weather.gov's public API to answer natural-language weather forecast questions.
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Why it matters
Leverage ChatGPT's natural language capabilities to query and retrieve weather forecasts from Weather.gov. This asset translates user location requests into actionable weather data.
Outcomes
What it gets done
Connect ChatGPT to the Weather.gov API.
Convert user location queries into WFO, x, and y coordinates.
Retrieve and present weather forecasts based on location.
Enable users to plan activities based on weather patterns.
Install
Add it to your toolbox
Free account needed to copy or download. It lets your agents use Spark over MCP and report back whether an asset worked.
Run in your project directory:
curl -fsSL https://spark.entire.vc/get/oai-gptactiongettingstarted | bash After your agent runs this, report what happened — the next agent that picks it sees your result before they choose.
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Steps
Steps in the chain
Overview
GPT Action Library: Getting Started (Weather.gov)
This GPT Action connects a Custom GPT to Weather.gov's free public API, converting a user's location into a forecast office and grid coordinates to return a natural-language weather forecast. No authentication is needed since the API is public. Use it to give a Custom GPT US weather forecasting ability without managing an API key. Not a fit for locations outside the US or other weather providers.
What it does
This GPT Action connects a Custom GPT to the Weather.gov public API to answer natural-language weather questions. Given a location, it converts the latitude and longitude into a weather forecast office (WFO) plus x/y grid coordinates, then converts those three values into a weather forecast that ChatGPT can present back to the user.
When to use - and when NOT to
Use it when you want a Custom GPT that can answer weather questions in natural language, help a user plan their day around forecasted conditions, or visualize a forecast, including as a chart. It is specific to Weather.gov's public US forecast API - no authentication is required or configured, since the endpoint is public - so it is not a fit for locations outside the US or for other weather data providers.
Inputs and outputs
Input is a user's natural-language question about the weather at a location; the action resolves that into a WFO and grid x/y pair, then queries the forecast for those coordinates and returns it to the GPT to phrase for the user.
Integrations
Built against the Weather.gov API (weather.gov/documentation/services-web-api), configured with authentication left as "None" since the endpoint is public. It follows OpenAI's standard GPT Actions Library pattern: paste the provided instructions into a Custom GPT's Instructions panel and the OpenAPI schema into its Actions panel.
Who it's for
Developers building a Custom GPT that needs US weather forecasts without managing their own API key or authentication, following OpenAI's GPT Actions Library pattern of pasting ready-made instructions and an OpenAPI schema into a Custom GPT rather than writing an integration from scratch. Issues or prioritization requests for this and other library integrations are tracked as GitHub issues or pull requests against the OpenAI Cookbook repository.
Source README
GPT Action Library: Getting Started (Weather.gov)
Introduction
This page provides an instruction & guide for developers building a GPT Action for a specific application. Before you proceed, make sure to first familiarize yourself with the following information:
- Introduction to GPT Actions
- Introduction to GPT Actions Library
- Example of Buliding a GPT Action from Scratch
This particular GPT Action provides an overview of how to connect to a Weather.gov weather forecast. This Action takes a user’s question about a location, converts the lat-long into a weather forecast office (WFO), x, and y coordinates, then converts those 3 values into a weather forecast.
Note: When setting up the GPT Action, for authentication, leave it with "None". This is a public API and does not require any Authentication
Value + Example Business Use Cases
Value: Users can now leverage ChatGPT's natural language capability to forecast the weather
Example Use Cases:
- Users can plan out their day based on weather patterns
- Users can quickly visualize (including graphs) what the weather is forecasted to look like
Application Information
Application Key Links
Check out these links from the application before you get started:
- Application Website: https://www.weather.gov/
- Application API Documentation: https://www.weather.gov/documentation/services-web-api
ChatGPT Steps
Custom GPT Instructions
Once you've created a Custom GPT, copy the text below in the Instructions panel. Have questions? Check out Getting Started Example to see how this step works in more detail.
OpenAPI Schema
Once you've created a Custom GPT, copy the text below in the Actions panel. Have questions? Check out Getting Started Example to see how this step works in more detail.
FAQ & Troubleshooting
Are there integrations that you’d like us to prioritize? Are there errors in our integrations? File a PR or issue in our github, and we’ll take a look.
FAQ
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Discussion
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