Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average sea temperature in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
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).Humidity
In Dahlgren, Virginia, the average relative humidity in January is 74%.Rainfall
In Dahlgren, in January, during 9.4 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. Throughout the year, in Dahlgren, there are 158.1 rainfall days, and 30.47" (774mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. January is the month with the most snowfall in Dahlgren, Virginia. Snow falls for 4 days and accumulates 1.85" (47mm) of snow.Ocean temperature
In Dahlgren, Virginia, the average seawater temperature in January is 48.7°F (9.3°C).Note: In 48.7°F (9.3°C), even brief exposure to 55.4°F (13°C) feels biting, and anything less than 50°F (10°C) risks cold shock and impaired breathing, considering one's health.
Daylight
In January, the average length of the day is 9h and 52min.On the first day of January in Dahlgren, sunrise is at 7:25 am and sunset at 4:58 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 5:28 pm EST.
Sunshine
In January, the average sunshine is 5.4h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Dahlgren, Virginia. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 2 during January leads to these advisories:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest in Dahlgren?
How cold is it in Dahlgren in January?
What is the average humidity in January in Dahlgren?
How much does it rain in Dahlgren in January?
When does it snow the most in Dahlgren?
How much does it snow in Dahlgren in January?
What is the water temperature in January in Dahlgren?
How many hours of daylight does Dahlgren have in January?
What time are sunrise and sunset in January in Dahlgren?
How many hours of sunshine does Dahlgren have in January?
What are the months with the lowest UV index in Dahlgren?
What is the UV index reading in January in Dahlgren?
Average temperature in January
Dahlgren, VA
- Average high temperature in January: 42.3°F
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).
- Average low temperature in January: 28.8°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 in January
Dahlgren, VA
- Average pressure in January: 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 in January
Dahlgren, VA
- Average wind speed in January: 7.4mph
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 in January
Dahlgren, VA
- Average humidity in January: 74%
The months with the highest relative humidity are May and December (78%).
The month with the lowest relative humidity is April (73%).
Average rainfall in January
Dahlgren, VA
- Average rainfall in January: 2.05"
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 in January
Dahlgren, VA
- Average rainfall days in January: 9.4 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 in January
Dahlgren, VA
- Average snowfall in January: 1.85"
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 in January
Dahlgren, VA
- Average snowfall days in January: 4 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 in January
Dahlgren, VA
- Average sea temperature in January: 48.7°F
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 in January /
Average sunshine in January
Dahlgren, VA
- Average daylight in January: 9h and 5min
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 2min
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 in January
Dahlgren, VA
- Average sunshine days in January: 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 in January
Dahlgren, VA
- Average UV index in January: 2
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 in January
Dahlgren, VA
- Average cloud cover in January: 42
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 in January
Dahlgren, VA
- Average visibility in January: 6mi
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).
Dahlgren, Virginia, USA
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