Climate and monthly weather forecastDahlgren, VA
Climate and monthly weather forecast
Weather in January
January, like December, in Dahlgren, Virginia, is a wintry winter month, with an average temperature fluctuating between 42.3°F (5.7°C) and 28.8°F (-1.8°C). January brings the lowest temperatures, with an average high of 42.3°F (5.7°C) and an average low of 28.8°F (-1.8°C). Weather in January »Weather in February
February, the last month of the winter in Dahlgren, is a chilly month, with an average temperature ranging between max 46.9°F (8.3°C) and min 31.3°F (-0.4°C). February's onset brings an average high-temperature of a frosty 46.9°F (8.3°C), showing a minute difference from January's 42.3°F (5.7°C). Weather in February »Weather in March
The first month of the spring, March, is a fresh month in Dahlgren, Virginia, with an average temperature fluctuating between 38.5°F (3.6°C) and 53.8°F (12.1°C). March witnesses a subtle temperature ascent, adjusting from a chilly 46.9°F (8.3°C) in February to a fresh 53.8°F (12.1°C). Weather in March »Weather in April
April in Dahlgren, Virginia, is a refreshing spring month, with an average temperature ranging between min 48.4°F (9.1°C) and max 66.4°F (19.1°C). April brings a rise in the average high-temperature, transitioning from March's cool 53.8°F (12.1°C) to a comfortable 66.4°F (19.1°C). Weather in April »Weather in May
May, the last month of the spring in Dahlgren, is a moderately hot month, with temperature in the range of an average low of 57.2°F (14°C) and an average high of 75°F (23.9°C). Dahlgren observes a slight uplift in the average high-temperature with the onset of May, adjusting from April's comfortable 66.4°F (19.1°C) to a warm 75°F (23.9°C). Weather in May »Weather in June
June, the first month of the summer in Dahlgren, is still a warm month, with temperature in the range of an average low of 64.8°F (18.2°C) and an average high of 82.8°F (28.2°C). Dahlgren's weather in June shows a minor rise in the average high-temperature, moving slightly up from May's moderately hot 75°F (23.9°C) to a still warm 82.8°F (28.2°C). Weather in June »Weather in July
July is a hot summer month in Dahlgren, Virginia, with an average temperature varying between 69.4°F (20.8°C) and 87.4°F (30.8°C). Dahlgren notes the warmest temperatures in July, with a high average of 87.4°F (30.8°C) and a low of 69.4°F (20.8°C). For most parts of July, the heat index is evaluated at a sweltering 100.4°F (38°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Dahlgren, Virginia, with an average temperature ranging between min 67.8°F (19.9°C) and max 85.5°F (29.7°C). As Dahlgren, Virginia, steps into August, the average high-temperature is measured at a moderately hot 85.5°F (29.7°C), displaying minor differences from July's 87.4°F (30.8°C). Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Dahlgren, Virginia, with an average temperature varying between 79°F (26.1°C) and 62.2°F (16.8°C). The advent of September brings a slight shift in average high-temperature, moving from a warm 85.5°F (29.7°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 refreshing autumn month in Dahlgren, Virginia, with temperature in the range of an average high of 67.5°F (19.7°C) and an average low of 52°F (11.1°C). October's onset brings a slight change in high-temperatures, falling from a moderately hot 79°F (26.1°C) in September to a comfortable 67.5°F (19.7°C). Weather in October »Weather in November
November, the last month of the autumn in Dahlgren, is also a moderate month, with temperature in the range of an average low of 41°F (5°C) and an average high of 55.8°F (13.2°C). November ushers in a slight temperature change, with average high-temperatures reducing from October's comfortable 67.5°F (19.7°C) to a still refreshing 55.8°F (13.2°C). Weather in November »Weather in December
The first month of the winter, December, is still a chilly month in Dahlgren, Virginia, with an average temperature ranging between min 35.1°F (1.7°C) and max 47.5°F (8.6°C). A mild drop in Dahlgren's average high-temperature is observed in December, transitioning from a moderate 55.8°F (13.2°C) in November to a chilly 47.5°F (8.6°C). Weather in December »Updated: Feb 14, 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
The coldest period in Dahlgren is January, when temperatures fluctuate between an average high of 42.3°F (5.7°C) and a low of 28.8°F (-1.8°C).
In Dahlgren, during the entire year, the rain falls for 158.1 days and collects up to 30.47" (774mm) of precipitation.
January through April, November and December are months with snowfall in Dahlgren, Virginia.
January is the month with the most snowfall. Snow falls for 4 days and accumulates 1.85" (47mm) of snow.
Throughout the year, in Dahlgren, Virginia, there are 12 snowfall days, and 6.73" (171mm) of snow is accumulated.
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Dahlgren, Virginia.
With an average ocean temperature of 46.8°F (8.2°C), February is the month with the coldest seawater in Dahlgren.
The months with the least sunshine are February and December, with an average of 5.1h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Dahlgren, 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.
April is the least humid month in Dahlgren, with an average relative humidity of 73%.
May and December, with an average relative humidity of 78%, are most humid months in Dahlgren.
In Dahlgren, 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.
July, known for its average high temperature of 87.4°F (30.8°C) and an average low temperature of 69.4°F (20.8°C), is the warmest month in Dahlgren, Virginia.
The months with the most rainfall in Dahlgren, Virginia, are July and August, with an average 3.19" (81mm) of precipitation.
The month with the most sunshine in Dahlgren is July, with an average of 10.6h of sunshine.
With an average ocean temperature of 78.4°F (25.8°C), August is the month with the warmest seawater in Dahlgren, Virginia.
September is the month with the least rainfall. Rain falls for 13.3 days and accumulates 1.97" (50mm) of precipitation.
With an average of 9h and 30min of daylight, December has the shortest days of the year.
Average temperature
Dahlgren, VA
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (42.3°F).
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).
Average pressure
Dahlgren, VA
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
30"Hg - Average pressure in May:
30.02"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
Dahlgren, VA
- Average wind speed in January:
7.4mph - Average wind speed in February:
7.6mph - Average wind speed in March:
7.8mph - Average wind speed in April:
8mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.5mph - Average wind speed in September:
6mph - Average wind speed in October:
6.9mph - Average wind speed in November:
6.9mph - Average wind speed in December:
6.6mph
The windiest month (with the highest average wind speed) is April (8mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity
Dahlgren, VA
The months with the highest relative humidity are May and December (78%).
The month with the lowest relative humidity is April (73%).
Average rainfall
Dahlgren, VA
- Average rainfall in January:
2.05" - Average rainfall in February:
2.28" - Average rainfall in March:
2.52" - Average rainfall in April:
2.8" - Average rainfall in May:
2.72" - Average rainfall in June:
2.68"
- Average rainfall in July:
3.19" - Average rainfall in August:
3.19" - Average rainfall in September:
1.97" - Average rainfall in October:
2.56" - Average rainfall in November:
2.09" - Average rainfall in December:
2.44"
The wettest months (with the highest rainfall) are July and August (3.19").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days
Dahlgren, VA
- Average rainfall days in January:
9.4 days - Average rainfall days in February:
10.7 days - Average rainfall days in March:
14.6 days - Average rainfall days in April:
15.7 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
14.2 days
- Average rainfall days in July:
16 days - Average rainfall days in August:
15.3 days - Average rainfall days in September:
13.3 days - Average rainfall days in October:
11.4 days - Average rainfall days in November:
9.5 days - Average rainfall days in December:
10.7 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (9.4 days).
Average snowfall
Dahlgren, VA
The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Dahlgren, VA
- Average snowfall days in January:
4 days - Average snowfall days in February:
3.6 days - Average snowfall days in March:
1.9 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 days
The month with the highest number of snowfall days is January (4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature
Dahlgren, VA
The best month for swimming (with the highest average sea temperature) is August (78.4°F).
The coldest month (with the lowest average sea temperature) is February (46.7°F).
Average daylight / Average sunshine
Dahlgren, VA
- Average daylight in January:
9h and 54min - 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 30min - 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 24min - Average sunshine in February:
5h and 6min - Average sunshine in March:
6h and 48min - Average sunshine in April:
9h and 0min - Average sunshine in May:
9h and 12min - Average sunshine in June:
10h and 18min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
10h and 6min - Average sunshine in September:
8h and 48min - Average sunshine in October:
5h and 36min - Average sunshine in November:
5h and 54min - Average sunshine in December:
5h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).
Average sunshine days
Dahlgren, VA
- Average sunshine days in January:
18.1 days - Average sunshine days in February:
14.7 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
12.8 days - Average sunshine days in May:
11.9 days - Average sunshine days in June:
13.7 days
- Average sunshine days in July:
12.6 days - Average sunshine days in August:
14.1 days - Average sunshine days in September:
15.5 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
19.4 days - Average sunshine days in December:
18.1 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.9 days).
Average UV index
Dahlgren, 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, February and December (UV index 2).
Average cloud cover
Dahlgren, VA
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility
Dahlgren, 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).
