Average Monthly Sunshine in Herndon

The graphs on this page shows the average number of hours per month and per day that Herndon receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

Monthly hours of sunshine

Seasonal sunshine in Herndon varies. It peaks at 282 hours in June and drops to 130 hours in December. The total annual amount of sun is 2520 hours.

Daily hours of sunshine

This means the city can be enjoyed more throughout the sunniest month of June under a blue sky, with approximately 9.4 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 4.3 hours of sunlight per day.

Herndon’s total hours of sunshine compared to other major cities

Herndon enjoys an average of 2520 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

Athens, Greece, enjoys 2769 hours of sunshine each year, making it one of the sunniest destinations in the Mediterranean region.

In Chicago, USA, the annual sunshine averages 2520 hours, contributing to its humid continental climate.

Vancouver, Canada, receives approximately 1940 hours of sunshine annually.

Perth, Australia, enjoys 3180 hours of sunshine annually, the highest among major Australian cities.

Other climate information

October, Herndon’s wettest month, receives 89 mm of rainfall and has a maximum daytime temperature of 20°C. During the driest month February you can expect a temperature of 6°C.

For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Herndon Precipitation page.