Synoptic’s Mesonet API is an expansive geophysical database of both historical and real-time surface-based weather observations from over 75,000 public and private observing stations, creating upwards of 34 million observations available to you, the user. This REST API is a request-based data delivery service using a simple HTTP call that can extract minutes or years of data in seconds for locations across the globe. The API allows for complete customization via the API call. A user can request specific variables at any time for an exact location anywhere on the globe. Need to find all stations within a certain radius? The API can do that too!

There are a multitude of API services. Below is a quick introduction to those that are most widely used. To learn more and get access to the API, click on the Get Started button below.


Time Series: Returns data for a station or set of stations based on a user-defined time span.

Latest: Returns the most recent observation from a station or set of stations.

Nearest Time: Returns the observation closest to the time requested.


Metadata: Returns station metadata including location, elevation, and parameters observed.


  • improved licensing, data rights management,
    and quality control

  • improved data and metadata uploading,
    editing, and viewing

  • sensor network management services

  • collection and management of data user fees

  • support for customized alerting and reporting algorithms

  • observation and sensor assessment

Due to the nature of our company as a Public Benefit Corporation, use of the Mesonet API (up to a certain number of requests) is free. This can be accomplished either through the use of an API call or via the Download tool. If you need more support or a more advanced service, we offer pay-as-you-go plans and enterprise contracts for industry partners. See our Pricing page for more information.

Ready to get started? Click Get Started below to receive your free API key. Have questions? Contact Us!

Get Your API Key Today.