Rockville (MD) Climate by Month
Rockville experiences great temperature shifts.
The city's weather can transition from very warm days
to cold weather.
It also has a notably wet climate with much precipitation.
Let’s explore the climate details in depth to provide you with a complete overview.
Average day and night temperature
The climate in Rockville is known for significant temperature differences throughout the year, making the weather dynamic. Average daytime temperatures range from a very warm 31°C in July, the warmest time of the year, to a chilly 5°C during cooler months like January. At night, temperatures typically average around -4°C during these months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Rockville has a notably wet climate with abundant precipitation, recording 1161 mm of rain/snowfall per year. While rainfall varies throughout the year, each season offers its own charm. October brings wetter days averaging 133 mm of precipitation, spread over 10 rainy days. In contrast, February experiences a drier climate, with about 67 mm of rainfall spread across 10 rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
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.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is low throughout the year in Rockville.
Relative humidity over the year
The best time of year to visit Rockville in the United States of America
During the months of May and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The hottest season / summer takes place in June, July, August and September.
July has an average maximum temperature of 31°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 5°C.
October tops the wettest month list with 133 mm of rainfall.
February is the driest month with 67 mm of precipitation.
June is the sunniest month with an average of 282 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
