Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
Rockville (MD) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Rockville.
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Climate overview of Rockville
Temperatures in Rockville, Maryland, United States of America, vary greatly throughout the year. July is the hottest month at 31°C (88°F), while January is the coldest at 5°C (41°F).
Rain/snowfall is high, totalling around 1161 mm (46 in) per year. October is the wettest month and February the driest. The city also experiences very warm summers and cold winters. Sunshine peaks in June, when the city sees around 9.4 hours of sunshine per day.
Rockville Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Rockville - and find the best time to visit.
Monthly Temperature in Rockville
The climate in Rockville is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a very warm 31°C (88°F) in July, the warmest time of the year, to a chilly 5°C (41°F) during cooler months like January.
At night, you can expect temperatures ranging from 20°C (68°F) in July to around -4°C (25°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Rockville
Rockville has a notably wet climate with abundant precipitation, recording 1161 mm (46 in) of rain/snowfall per year. While rainfall varies throughout the year, each season offers its own charm. October brings wetter days averaging 133 mm (5.2 in) of precipitation, spread over 10 rainy days.
In contrast, the driest month February experiences a drier climate, with about 67 mm (2.6 in) of rainfall spread across 10 rainy days. For more details, please visit our Rockville Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Rockville
Seasonal changes in sunshine hours are quite dramatic in Rockville. 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
Data from: Washington DC, the United States of America (27 KM, 17 Miles).
Daily hours of sunshine
Data from: Washington DC, the United States of America (27 KM, 17 Miles).
Daily percentage of sunshine
Data from: Washington DC, the United States of America (27 KM, 17 Miles).
Humidity in Rockville by Month
The relative humidity is high throughout the year in Rockville.
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
Data from: Washington DC, the United States of America (27 KM, 17 Miles).
Best Time to Visit Rockville
For comfortable weather, consider visiting Rockville in August. Conditions are usually least favourable in January, February and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
cold
Feb
cold
Mar
mixed
Apr
very good
May
very good
Jun
very good
Jul
good
Aug
excellent
Sep
very good
Oct
good
Nov
mixed
Dec
wet
- Best overall: August
- Warmest weather: July and August
- Most sunshine: June and July
- Seasonal pattern: Very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -4°C (25°F).
Frequently asked questions about the climate in Rockville
What is the best time to visit Rockville?
August typically offers the most optimal weather in Rockville. In contrast, January, February and December tend to have less optimal conditions. Rockville has very warm summers and cold winters.
What temperatures can I expect in Rockville?
Daytime highs range from 5°C (41°F) in January to 31°C (88°F) in July. Nighttime lows range from -4°C (25°F) to 20°C (68°F). Temperatures vary considerably through the year.
How much rain does Rockville get?
Annual rainfall is around 1161 mm (46 in). October is the wettest month with 133 mm (5.2 in), while February is the driest with 67 mm (2.6 in).
How sunny is Rockville?
Rockville receives around 2,520 hours of sunshine per year. June is the sunniest month with 282 hours, while December is the cloudiest with just 130 hours. Overall, Rockville enjoys abundant sunshine.
Rockville 3-Day Forecast
Rockville on the map
Rockville is highlighted - select any city to see its climate.
Popular in October
Where to go in October - average daytime high across popular destinations.
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29°C (84°F) Destin26°C (79°F) Los Angeles24°C (75°F) New York City19°C (66°F) Big Bear Lake19°C (66°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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