Annapolis Junction (MD) Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from very warm to chilly in Annapolis Junction. Average maximum daytime temperatures range from a very warm 31°C (88°F) in July, the warmest time of the year, to a chilly 6°C (43°F) during cooler months like January.

At night, you can expect temperatures ranging from 20°C (68°F) in July to around -5°C (23°F) during January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Annapolis Junction has a relatively rain/snowy climate with high precipitation levels, averaging 1207 mm (48 in) of rain/snowfall annually. While rainfall varies throughout the year, each season offers its own charm. October brings wetter days averaging 138 mm (5.4 in) of precipitation, spread over 10 rainy days.

In contrast, the driest month November experiences a drier climate, with about 72 mm (2.8 in) of rainfall spread across 9 rainy days. For more details, please visit our Annapolis Junction Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in Annapolis Junction. While June receives considerable daily sunshine with up to 9.4 hours, December marks the darkest time of the year, where sunshine is scarce with only 4.3 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Annapolis Junction.

The city experiences its highest humidity in August, reaching 69%. In March, the humidity drops to its lowest level at 58%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year