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# OpenMeteo

Open Meteo features a lot of data with granularity of up to hourly. We are focusing on primarily irradiance and cloud coverage data, as well as temperature data. 

The website features an easy way to pick what data you want and tweak the parameters. They also provide the relevant url for users to query via REST API. 

~~As of 03/02/2026, we are paying for a license (Professional Tier) as irradiance data is not available for other tiers.~~

Due to the limits being only enforced per month, and it has a high limit (5M calls/month), users are currently fetching directly from OpenMeteo.

NOTE: For hourly data, OpenMeteo pushes a full day of data entry (i.e. from 0000 to 2300) at the start of the day. This means that if you want to fetch the current hourly data, you have to ensure you adjust the index you are accessing (2300 will be the end of the array, 2200 will be at -1...)