Manassas Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Manassas.
Climate overview of Manassas
The climate in Manassas, Virginia, United States of America, is marked by large temperature swings across the seasons, ranging from 31°C (88°F) in July to 6°C (43°F) in January.
The city has a wet climate, receiving around 1153 mm (45 in) of rain/snowfall per year. May is the wettest month. Sunshine peaks in June, when the city sees around 9.4 hours of sunshine per day.
Manassas Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Manassas — and find the best time to visit.
Monthly Temperature in Manassas
In Manassas, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a very warm 31°C (88°F) in July to a chilly 6°C (43°F) in January.
Nighttime temperatures range from 20°C (68°F) in July to -5°C (23°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Manassas
Manassas experiences significant rain/snowfall throughout the year, averaging 1153 mm (45 in) of precipitation annually. The amount of precipitation varies moderately throughout the year. The wettest month, May, sees around 132 mm (5.2 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, February, still receives a respectable 62 mm (2.4 in) of rainfall. For more details, please visit our Manassas 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 Manassas
In Manassas, 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 average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Manassas by Month
The relative humidity is high throughout the year in Manassas.
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
Best Time to Visit Manassas
Frequently asked questions about the climate in Manassas
What is the best time to visit Manassas?
April typically offers the most optimal weather in Manassas. In contrast, January, February and December tend to have less optimal conditions.
What temperatures can I expect in Manassas?
Daytime highs range from 6°C (43°F) in January to 31°C (88°F) in July. Nighttime lows range from -5°C (23°F) to 20°C (68°F). Temperatures vary considerably through the year.
How much rain does Manassas get?
Annual rainfall is around 1153 mm (45 in). May is the wettest month with 132 mm (5.2 in), while February is the driest with 62 mm (2.4 in).
How sunny is Manassas?
Manassas 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, Manassas enjoys abundant sunshine.
Manassas 3-Day Forecast
Manassas 3-Day Forecast
Manassas on the map
Manassas is highlighted — select any city to see its climate.
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