Summary

• The US basked in excess sunshine in the March quarter of 2026, with solar insolation levels exceeding the 20-year average by 5.8%.
• Wind was more diversified in terms of average winds in the March quarter.
• Solar radiation is the mean surface downward shortwave radiation flux, measured from the fifth-generation European Centre for Medium-Range Weather Forecasts reanalysis.

The US basked in excess sunshine in the March quarter of 2026, with solar insolation levels exceeding the 20-year average by 5.8%. Average wind speeds for the quarter were near normal, with a negative deviation from the

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