Climate and monthly weather forecast
Manassas, VA

Weather in January

January, the same as December, is another cold winter month in Manassas, Virginia, with average temperature ranging between min 26.4°F (-3.1°C) and max 40.6°F (4.8°C). The coldest month is January, with an average high-temperature of 40.6°F (4.8°C) and an average low-temperature of 26.4°F (-3.1°C). Weather in January »

Weather in February

The last month of the winter, February, is a frosty month in Manassas, Virginia, with average temperature ranging between max 45.1°F (7.3°C) and min 28.8°F (-1.8°C). In February, the average high-temperature is practically the same as in January - a chilly 45.1°F (7.3°C). Weather in February »

Weather in March

March, the first month of the spring, in Manassas, is a cool month, with temperature in the range of an average low of 36°F (2.2°C) and an average high of 53.2°F (11.8°C). In Manassas, the average high-temperature slightly increases, from a chilly 45.1°F (7.3°C) in February, to a cool 53.2°F (11.8°C). Weather in March »

Weather in April

April is an enjoyable spring month in Manassas, Virginia, with average temperature varying between 45.9°F (7.7°C) and 65.7°F (18.7°C). In Manassas, Virginia, the average high-temperature in April rises, from a fresh 53.2°F (11.8°C) in March, to an enjoyable 65.7°F (18.7°C). Weather in April »

Weather in May

The last month of the spring, May, is a warm month in Manassas, Virginia, with average temperature varying between 55.2°F (12.9°C) and 75.4°F (24.1°C). In May, the average high-temperature rises, from an enjoyable 65.7°F (18.7°C) in April, to a moderately hot 75.4°F (24.1°C). Weather in May »

Weather in June

The first month of the summer, June, is still a warm month in Manassas, Virginia, with average temperature ranging between min 62.8°F (17.1°C) and max 83.7°F (28.7°C). In Manassas, the average high-temperature in June marginally rises, from a moderately hot 75.4°F (24.1°C) in May, to a still warm 83.7°F (28.7°C). Weather in June »

Weather in July

July is a tropical summer month in Manassas, Virginia, with average temperature ranging between max 88.3°F (31.3°C) and min 67.1°F (19.5°C). With an average high-temperature of 88.3°F (31.3°C) and an average low-temperature of 67.1°F (19.5°C), July is the warmest month. In July, the average heat index is estimated at a torrid 102.4°F (39.1°C). Weather in July »

Weather in August

August, the last month of the summer, in Manassas, is another warm month, with temperature in the range of an average high of 85.8°F (29.9°C) and an average low of 65.8°F (18.8°C). In Manassas, the average high-temperature is relatively the same as in July - a moderately hot 85.8°F (29.9°C). Weather in August »

Weather in September

September, the first month of the autumn, in Manassas, is also a moderately hot month, with average temperature ranging between max 79°F (26.1°C) and min 59.7°F (15.4°C). In September, the average high-temperature slightly decreases, from 85.8°F (29.9°C) in August, to a still moderately hot 79°F (26.1°C). Weather in September »

Weather in October

October, the same as September, is another enjoyable autumn month in Manassas, Virginia, with average temperature fluctuating between 49.1°F (9.5°C) and 67.1°F (19.5°C). In Manassas, the average high-temperature drops, from a warm 79°F (26.1°C) in September, to an enjoyable 67.1°F (19.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cool month in Manassas, Virginia, with average temperature ranging between min 38.1°F (3.4°C) and max 54.5°F (12.5°C). In Manassas, the average high-temperature decreases, from an enjoyable 67.1°F (19.5°C) in October, to a fresh 54.5°F (12.5°C). Weather in November »

Weather in December

December, the first month of the winter, in Manassas, is still a chilly month, with average temperature varying between 32.4°F (0.2°C) and 45.7°F (7.6°C). In December, the average high-temperature slightly decreases, from a cool 54.5°F (12.5°C) in November, to a frosty 45.7°F (7.6°C). Weather in December »
[Resources]

FAQ

What is the coldest month in Manassas?

January is the coldest month, with an average high-temperature of 40.6°F (4.8°C) and an average low-temperature of 26.4°F (-3.1°C).

How much does it rain in Manassas?

Throughout the year, in Manassas, there are 157.5 rainfall days, and 30.35" (771mm) of precipitation is accumulated.

When does it snow in Manassas?

January through April, November and December are months with snowfall.

When does it snow the most in Manassas?

The month with the most snowfall in Manassas is January when snow falls for 4.9 days and typically aggregates up to 3.7" (94mm) of snow.

How many days does it snow in Manassas?

In Manassas, during the entire year, snow falls for 15.8 days, and aggregates up to 11.5" (292mm) of snow.

What is the month with the least sunshine in Manassas?

Months with the least sunshine in Manassas are January, February and December, with an average of 5.2h of sunshine.

What are the months with the lowest UV index in Manassas?

Months with the lowest UV index in Manassas, Virginia, are January, February, November and December, with an average maximum UV index of 2.

When it does not snow in Manassas?

In Manassas snow does not fall in May through October.

What is the month with the highest UV index in Manassas?

May through August, with an average maximum UV index of 6, are months with the highest UV index in Manassas, Virginia.

When are the longest days in Manassas?

June has the longest days of the year in Manassas, with an average of 14.8h of daylight.

What is the warmest month in Manassas?

With an average high-temperature of 88.3°F (31.3°C) and an average low-temperature of 67.1°F (19.5°C), July is the warmest month in Manassas.

What is the least humid month in Manassas?

The least humid month in Manassas, Virginia, is July, with an average relative humidity of 72%.

What month has the most sunshine in Manassas?

July has the most sunshine of the year in Manassas, Virginia, with an average of 10.7h of sunshine.

What is the rainiest month in Manassas?

The month with the most rainfall in Manassas, Virginia, is August when the rain falls for 16.3 days and typically aggregates up to 3.43" (87mm) of precipitation.

What is the driest month in Manassas?

September is the month with the least rainfall in Manassas, Virginia. Rain falls for 12.7 days and accumulates 1.93" (49mm) of precipitation.

What is the most humid month in Manassas?

The most humid month in Manassas, Virginia, is December, with an average relative humidity of 78%.

What is the month with the shortest days in Manassas?

With an average of 9.5h of daylight, December has the shortest days of the year.

Average temperature
Manassas, VA

Average temperature - Manassas, VA

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (40.6°F).

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).

[Resources]

Average pressure
Manassas, VA

Average pressure - Manassas, VA

The month with the highest atmospheric pressure is November (30.14").
The month with the lowest atmospheric pressure is June (29.95").

[Resources]

Average wind speed
Manassas, VA

Average wind speed - Manassas, VA

The windiest months (with the highest average wind speed) are March and April (7mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).

[Resources]

Average rainfall
Manassas, VA

Average rainfall - Manassas, VA

The wettest month (with the highest rainfall) is August (3.43").
The driest month (with the least rainfall) is September (1.93").

[Resources]

Average rainfall days
Manassas, VA

Average rainfall days - Manassas, VA

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is November (9.3 days).

[Resources]

Average snowfall
Manassas, VA

Average snowfall - Manassas, VA

The month with the highest snowfall is January (3.7").
Months with the least snowfall are May, June, July, August, September and October (0").

[Resources]

Average snowfall days
Manassas, VA

Average snowfall days - Manassas, VA

The month with the highest number of snowfall days is February (5.2 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

[Resources]

Average daylight / Average sunshine
Manassas, VA

Average daylight / Average sunshine - Manassas, VA

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

The month with the most sunshine is July (Average sunshine: 10.7h).
Months with the least sunshine are January, February and December (Average sunshine: 5.2).

[Resources]

Average sunshine days
Manassas, VA

Average sunshine days - Manassas, VA

The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is May (11.7 days).

[Resources]

Average UV index
Manassas, VA

Average UV index - Manassas, VA

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

[Resources]

Average visibility
Manassas, VA

Average visibility - Manassas, VA

Months with the highest visibility are January, February, March, April, June, July, August and November (6mi).
Months with the lowest visibility are May, September, October and December (5mi).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location