--- url: "https://polytoolhub.com/tools/nws-weather-api/" publisher: "Polytoolhub" dateModified: "2026-10-26" --- [← Weather research]() ![National Weather Service API logo]() Data API # National Weather Service API Access official U.S. weather forecasts, observations and alerts for weather-market research. [**4.0**/ 5Editorial rating]() [0 user reviews]() [Open documentation]() www.weather.gov **Available on:** API **Pricing:** The official API documentation states that access is free, subject to reasonable unpublished rate limits. [Screenshots]() [Explore alternatives]() **Availability: public** · A descriptive User-Agent is required. Follow the current documentation for authentication and content negotiation. [Weather research]() [Data APIs]() ## Screenshots and interface Product preview1 / 1 Official National Weather Service API documentation with access and specification sections. ## What is National Weather Service API? The National Weather Service API exposes forecasts, observations and alerts through documented machine-readable endpoints. It is an external research input for U.S. weather questions, not a prediction-market trading service. The distinction between forecast and observation is crucial. A daily maximum contract may depend on a named station, local reporting day and specific settlement publication, which a nearby forecast grid does not automatically reproduce. ### Who it is for - Developers building U.S. weather research tools - Researchers checking forecasts against observations ## Features and coverage **Available on:** API - **Weather endpoints** Retrieve documented forecast, alert and observation data. - **Machine-readable formats** Use GeoJSON and other documented representations. - **Operational guidance** Read caching, rate-limit, feature-flag and outage information. ## Workflows with National Weather Service API ### Build a location feed Follow the official examples to map the intended location to the appropriate forecast or station data. ### Check settlement relevance Compare station, unit and reporting period with the contract’s specified source before interpreting a reading. ## Pricing and total cost The official API documentation states that access is free, subject to reasonable unpublished rate limits. **Access:** A descriptive User-Agent is required. Follow the current documentation for authentication and content negotiation. ## Getting started 1. Read the official API examples and specification. 2. Identify the required location, station and data type. 3. Use the documented headers and caching behaviour, then validate timestamps and units. ## Useful links ### What to check - The API’s forecast is not a final observed settlement value. Geographic coverage, station choice, missing observations and update timing matter. A closer look ## Ratings & reviews [Write a review]() Editorial rating **4.0**/ 5 0 user reviews Polytoolhub editorial ### Our take on National Weather Service API An authoritative, well-documented U.S. weather input. Its relevance to a particular contract depends on selecting the correct station, measure and reporting window. Based on documented features, setup and access terms. [How we rate]() ### User reviews 0 The main score switches to user ratings after 5 published reviews. **Be the first to share your experience** A specific example helps the next person choose the right tool. Write a review ### How was your experience with National Weather Service API? Share what you used, what worked and what could be better. We confirm your email and review the submission before publishing. To submit a review, email [info@polytoolhub.com]() with the tool name, your rating and your experience. Enable JavaScript to prepare a draft here. ## Related tools [Browse category]() ![FRED Economic Data: Official FRED public homepage with data search, tags and chart access.]() ![FRED Economic Data logo]()[FRED Economic Data]() Research tool**4.0**Editorial Research inflation, employment, GDP and other economic series with FRED’s charts and release calendar. - Access Web Combine separately defined weather and economic datasets for broader event research. ![Climate Sight: Station weather report, settlement references and market summary.]() ![Climate Sight logo]()[Climate Sight]() Research tool**3.5**Editorial Research weather contracts using station-specific observations, forecasts, official weather reports and market coverage by city. - Access Web Also in Weather Research and Data for Prediction Markets. ![FactsAI: Official research API presentation. No authenticated request was submitted.]() ![FactsAI logo]()[FactsAI]() Data API**3.5**Editorial Retrieve cited research answers through a JSON API for forecasting and event-analysis workflows. - Access API Find contextual sources while retaining official weather observations as the primary data. ## Frequently asked questions about National Weather Service API ### Is an hourly forecast the same as the final daily maximum? No. A forecast is an estimate; the contract may require a specific observed station statistic. ### Does the API charge per request? The official documentation describes free access with rate limits rather than a per-request price. ### What does National Weather Service API cost? The official API documentation states that access is free, subject to reasonable unpublished rate limits. ### What access does National Weather Service API require? A descriptive User-Agent is required. Follow the current documentation for authentication and content negotiation. 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