Free API Plan Rate Limits

The Tomorrow.io Free API plan offers developers flexible access to core weather data while maintaining fair usage across all users. To ensure consistent performance and availability, the plan includes rate limits based on daily, hourly, and per-second usage.

Rate Limit Overview

There are no weekly or monthly caps beyond these limits. As long as your usage remains within the daily, hourly, and per-second thresholds, you can continue accessing weather data without interruption.

What Counts as an API Call?

Each API request—whether for weather data or a visual map tile—counts toward your usage. For more details on how API calls are calculated, see How API Calls Are Counted.

Included Weather Parameters

The Free plan grants access to core weather parameters such as temperature, wind speed, precipitation, and humidity. For a complete list of available data, visit our API documentation.

Helpful Tools for API Users

Validate Your API Queries

Use the QA tool in our API documentation to test your queries before deploying. This helps ensure your requests are properly structured and return the expected results.

Note: You must create an account and be logged in to use this feature.

Smart Search and API Assistant

Not sure where to start? Use our AI-powered Smart Search in the API Docs to quickly find parameters, endpoints, or guidance by typing natural-language queries.
For example:

• “How do I get hourly forecasts?”

• “What parameters are in the free tier?”

Our customized API assistant can also help walk you through building tailored API calls and understanding available data fields.

Need More?

If you’re building a commercial solution, scaling your usage, or need access to premium parameters (like pollen, lightning, or air quality), contact our team at sales@tomorrow.io to learn more about available plans.