Average Monthly Sunshine hours in Herndon

This graph shows the average number of hours per month that Herndon receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

• On average, June is the sunniest month with 282 hours of sunshine.
• December has on average the lowest amount of sunshine with 130 hours.
• On average, the total annual amount of sun is 2520 hours.

Forecast: is it sunny in Herndon?

Tue   Nov 19

17°C | 8°C

SE 11 km/h

1.1 mm

broken clouds and small chance of slight rain

hourly forecast

Wed   Nov 20

21°C | 9°C

SE 11 km/h

13 mm

partly cloudy and chance of rain

hourly forecast

Thu   Nov 21

11°C | 3°C

W 22 km/h

4.3 mm

broken clouds and chance of slight rain

hourly forecast

5-Day Forecast 10-Day Forecast