Climate and monthly weather forecastMount Vernon, VA
Climate and monthly weather forecast
Weather in January
January, the same as December, is a wintry winter month in Mount Vernon, Virginia, with an average temperature fluctuating between 40.6°F (4.8°C) and 27.7°F (-2.4°C). Mount Vernon records the coldest temperatures in January, averaging a high of 40.6°F (4.8°C) and a low of 27.7°F (-2.4°C). Weather in January »Weather in February
The last month of the winter, February, is a chilly month in Mount Vernon, Virginia, with temperature in the range of an average high of 45.1°F (7.3°C) and an average low of 30.2°F (-1°C). A minimal variation is noted in Mount Vernon's average high-temperature at the onset of February, reaching a frosty 45.1°F (7.3°C) from January's 40.6°F (4.8°C). Weather in February »Weather in March
March, the first month of the spring in Mount Vernon, is a cool month, with an average temperature varying between 53.2°F (11.8°C) and 37.4°F (3°C). March introduces a minor temperature shift, with average high-temperatures adjusting from February's chilly 45.1°F (7.3°C) to a cool 53.2°F (11.8°C). Weather in March »Weather in April
April is a comfortable spring month in Mount Vernon, Virginia, with an average temperature varying between 47.3°F (8.5°C) and 65.1°F (18.4°C). Mount Vernon's transition into April is marked by a temperature shift, moving from a cool 53.2°F (11.8°C) in March to an enjoyable 65.1°F (18.4°C). Weather in April »Weather in May
May, the last month of the spring in Mount Vernon, is a moderately hot month, with temperature in the range of an average low of 56.8°F (13.8°C) and an average high of 74.7°F (23.7°C). In Mount Vernon, the average high-temperature in May increases from a refreshing 65.1°F (18.4°C) in April to a warm 74.7°F (23.7°C). Weather in May »Weather in June
The first month of the summer, June, is also a moderately hot month in Mount Vernon, Virginia, with an average temperature ranging between min 64.2°F (17.9°C) and max 82.8°F (28.2°C). The commencement of June sees a minor shift in the average high-temperature, moving from a moderately hot 74.7°F (23.7°C) in May to a still warm 82.8°F (28.2°C). Weather in June »Weather in July
July in Mount Vernon, Virginia, is a tropical summer month, with temperature in the range of an average high of 87.8°F (31°C) and an average low of 69.1°F (20.6°C). Mount Vernon's July weather, with an average high temperature of 87.8°F (31°C) and an average low temperature of 69.1°F (20.6°C), tends to be the warmest of the year. During July, the heat index is estimated at a sweltering 100.4°F (38°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Mount Vernon, Virginia, with an average temperature ranging between min 67.6°F (19.8°C) and max 85.6°F (29.8°C). August's onset brings an average high-temperature of a moderately hot 85.6°F (29.8°C), showing a minute difference from July's 87.8°F (31°C). Weather in August »Weather in September
September, the first month of the autumn in Mount Vernon, is also a moderately hot month, with an average temperature fluctuating between 78.6°F (25.9°C) and 61.7°F (16.5°C). In September, the average high-temperature marginally decreases from a moderately hot 85.6°F (29.8°C) in August to a still warm 78.6°F (25.9°C). Weather in September »Weather in October
October, the same as September, is another comfortable autumn month in Mount Vernon, Virginia, with an average temperature fluctuating between 67.1°F (19.5°C) and 51.3°F (10.7°C). Mount Vernon in October demonstrates a small temperature transition, adjusting from an average high of a moderately hot 78.6°F (25.9°C) in September to a refreshing 67.1°F (19.5°C). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Mount Vernon, Virginia, with an average temperature ranging between min 39.9°F (4.4°C) and max 55°F (12.8°C). The start of November involves a temperature drop, moving from a refreshing 67.1°F (19.5°C) in October to a fresh 55°F (12.8°C). Weather in November »Weather in December
The first month of the winter, December, is also a frosty month in Mount Vernon, Virginia, with an average temperature ranging between max 46.2°F (7.9°C) and min 34°F (1.1°C). December marks a gentle change in average high-temperature, declining from November's fresh 55°F (12.8°C) to a frosty 46.2°F (7.9°C). Weather in December »Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January, noted for its average high-temperature of 40.6°F (4.8°C) and an average low-temperature of 27.7°F (-2.4°C), is considered the coldest month.
Throughout the year, there are 158.2 rainfall days, and 30.67" (779mm) of precipitation is accumulated.
January through April, November and December are months with snowfall in Mount Vernon.
January is the month with the most snowfall. Snow falls for 4.5 days and accumulates 2.48" (63mm) of snow.
In Mount Vernon, during the entire year, snow falls for 14.4 days and aggregates up to 7.56" (192mm) of snow.
The months with the lowest UV index are January and December, with an average maximum UV index of 2.
February has the least sunshine of the year, with an average of 5.1h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
The months with the lowest humidity are April and July, with an average relative humidity of 71%.
May, October and December, with an average relative humidity of 76%, are most humid months.
In Mount Vernon, snow does not fall in May through October.
The months with the highest UV index are May through August, with an average maximum UV index of 6.
With an average of 14h and 48min of daylight, June has the longest days of the year.
Mount Vernon's warmest weather arrives in July, when temperatures average a high of 87.8°F (31°C) and a low of 69.1°F (20.6°C).
The month with the most sunshine is July, with an average of 10.8h of sunshine.
August is the month with the most rainfall in Mount Vernon, Virginia. Rain falls for 15.9 days and accumulates 3.43" (87mm) of precipitation.
The month with the least rainfall is September, when the rain falls for 11.9 days and typically collects 1.93" (49mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 30min of daylight.
Average temperature
Mount Vernon, VA
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (40.6°F).
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).
Average pressure
Mount Vernon, VA
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed
Mount Vernon, VA
- Average wind speed in January:
7.5mph - Average wind speed in February:
7.6mph - Average wind speed in March:
7.8mph - Average wind speed in April:
7.7mph - Average wind speed in May:
6.3mph - Average wind speed in June:
5.8mph
- Average wind speed in July:
5.1mph - Average wind speed in August:
5mph - Average wind speed in September:
5.6mph - Average wind speed in October:
6.6mph - Average wind speed in November:
6.8mph - Average wind speed in December:
6.8mph
The windiest month (with the highest average wind speed) is March (7.8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity
Mount Vernon, VA
The months with the highest relative humidity are May, October and December (76%).
The months with the lowest relative humidity are April and July (71%).
Average rainfall
Mount Vernon, VA
- Average rainfall in January:
2.05" - Average rainfall in February:
2.17" - Average rainfall in March:
2.44" - Average rainfall in April:
2.76" - Average rainfall in May:
2.95" - Average rainfall in June:
2.6"
- Average rainfall in July:
2.95" - Average rainfall in August:
3.43" - Average rainfall in September:
1.93" - Average rainfall in October:
2.56" - Average rainfall in November:
2.17" - Average rainfall in December:
2.68"
The wettest month (with the highest rainfall) is August (3.43").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days
Mount Vernon, VA
- Average rainfall days in January:
9.9 days - Average rainfall days in February:
10.6 days - Average rainfall days in March:
14.4 days - Average rainfall days in April:
15.7 days - Average rainfall days in May:
17.7 days - Average rainfall days in June:
14.5 days
- Average rainfall days in July:
16.5 days - Average rainfall days in August:
15.9 days - Average rainfall days in September:
11.9 days - Average rainfall days in October:
12 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
10.6 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is November (8.5 days).
Average snowfall
Mount Vernon, VA
The month with the highest snowfall is January (2.48").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Mount Vernon, VA
- Average snowfall days in January:
4.5 days - Average snowfall days in February:
4.3 days - Average snowfall days in March:
2.6 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.4 days - Average snowfall days in December:
2.5 days
The month with the highest number of snowfall days is January (4.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Mount Vernon, VA
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 48min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
5h and 12min - Average sunshine in February:
5h and 6min - Average sunshine in March:
6h and 54min - Average sunshine in April:
8h and 54min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 18min
- Average sunshine in July:
10h and 48min - Average sunshine in August:
10h and 12min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 48min - Average sunshine in December:
5h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days
Mount Vernon, VA
- Average sunshine days in January:
17.6 days - Average sunshine days in February:
14.3 days - Average sunshine days in March:
13.9 days - Average sunshine days in April:
12.4 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
13.7 days
- Average sunshine days in July:
12.7 days - Average sunshine days in August:
13.7 days - Average sunshine days in September:
16.5 days - Average sunshine days in October:
17.7 days - Average sunshine days in November:
19.8 days - Average sunshine days in December:
17.4 days
The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is May (11.5 days).
Average UV index
Mount Vernon, VA
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover
Mount Vernon, VA
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility
Mount Vernon, VA
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
