National Harbor (MD) Sunshine Hours by Month

When exploring climate, sunlight hours tell an important story. This page shows the total number of hours of direct sunlight per month and the average hours per day in National Harbor, Maryland, United States of America. These averages rely on historical data collected over 30 years, from 1990 to 2020.

Monthly hours of sunshine

Sunshine in National Harbor varies greatly throughout the year. The sunniest month, June, reaches an impressive 282 hours, while December, the darkest month, offers only 130 hours. The total annual amount of sun is 2520 hours.

Daily hours of sunshine

In National Harbor, summer days are longer and more sunny, with daily sunshine hours peaking at 9.4 hours in June. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 4.3 hours per day.

Average percent of sunshine

On average the sun shines 64% of the time during the day in June, the highest percentage of any month. December has the lowest percentage at 45%.

National Harbor 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.

Manchester, UK, experiences just around 1420 hours of sunshine annually.

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

In Brisbane, Australia, the annual sunshine averages 2999 hours, making it one of Australia’s sunniest cities.

June, National Harbor’s wettest month, receives 94 mm (3.7 in) of rainfall and has a maximum daytime temperature of 30°C (86°F). During the driest month February you can expect a temperature of 8°C (46°F).

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