Average Monthly Sunshine in Rockville (MD)

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

Monthly hours of sunshine

Seasonal sunshine in Rockville 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.

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

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

In Lisbon, Portugal, there are approximately 2801 hours of sunshine annually, highlighting its warm and sunny Mediterranean climate.

In contrast, London, UK, receives only about 1659 hours of sunshine per year, known for its frequently overcast and rainy skies.

Oslo, Norway, receives approximately 1690 hours of sunshine annually.

Adelaide, Australia, enjoys 2770 hours of sunshine annually, with long, sunny summers.

Other climate information

October, Rockville’s wettest month, receives 88 mm of rainfall and has a maximum daytime temperature of 19°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 Rockville Precipitation page.