Monthly Averages

Useful during the early stages of solar site prospecting when a coarse energy estimate is acceptable, or for smaller rooftop systems.

Solcast provides Monthly Averages files through our API Toolkit via an easy to use order form, and through a fast, scalable API service perfect for integrating with your chosen solar project software.

Access up to 5 Monthly Averages files per month, for free, using our Free tier subscription. Paid plans start from $49USD per month with no lock-in contract. For more details, checkout our pricing page.

If you are interested in accessing Monthly Averages files through our API, you can review our API docs here, to see if the service is a fit for your business.

You can access this API based service directly, after you sign-up for your free account in the Solcast API Toolkit.

About Monthly Averages files

We provide averaged monthly values of solar radiation data and other weather parameters.

Monthly averages provide a high-level overview of the solar resource available at a particular site.

They are useful during the early stages of solar site prospecting when a coarse energy estimate is acceptable, or for smaller rooftop systems.

Monthly Averages Data Specifications

CoverageGlobal, except for ocean and polar regions
Spatial resolution of satellite data used1-2 km
Time granularityMonthly
Timespan of database used to generate monthly averagesJanuary 2007 to 7 days ago
Parameters
  • Global Horizontal Irradiance (GHI, W/m2)
  • Direct Normal Irradiance (DNI, W/m2)
  • Diffuse Horizontal Irradiance (DIF, DHI, W/m2)
  • Temperature (TEMP, °C)
  • Wind Speed (WS, m/s)
Database update frequencyDaily (recent months are considered in monthly averages)
Access method
Download wait time
  • API Toolkit Request form: Typically 1 to 9 minutes
  • Synchronous API: less than 100ms

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