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 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, noted for its average high-temperature of 39.7°F (4.3°C) and an average low-temperature of 25.9°F (-3.4°C), is considered the coldest month in Ashburn.Humidity
In January, the average relative humidity in Ashburn, Virginia, is 74%.Rainfall
In Ashburn, in January, during 9.3 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. In Ashburn, during the entire year, the rain falls for 158.1 days and collects up to 31.46" (799mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. January is the month with the most snowfall in Ashburn. Snow falls for 5.1 days and accumulates 3.54" (90mm) of snow.Daylight
In January, the average length of the day in Ashburn is 9h and 48min.On the first day of the month, sunrise is at 7:28 am and sunset at 4:57 pm. On the last day of January, sunrise is at 7:17 am and sunset at 5:29 pm EST.
Sunshine
The months with the least sunshine are January, February and December, with an average of 5h of sunshine.UV index
The months with the lowest UV index in Ashburn are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 2 during January translates into the following guidance:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
What month is the coldest in Ashburn?
How cold is January in Ashburn?
What is the average humidity in January in Ashburn?
How much does it rain in Ashburn in January?
What is the snowiest month in Ashburn?
How much does it snow in Ashburn in January?
How many hours of daylight does Ashburn have in January?
What time are sunrise and sunset in January in Ashburn?
What are the months with the least sunshine in Ashburn?
How many hours of sunshine does Ashburn have in January?
What is the month with the lowest UV index in Ashburn?
How high is the UV index in January in Ashburn?
Average temperature in January
Ashburn, VA
- Average high temperature in January: 39.7°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in January: 25.9°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).
Average pressure in January
Ashburn, 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
Ashburn, VA
- Average wind speed in January: 7.2mph
The windiest month (with the highest average wind speed) is March (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in January
Ashburn, VA
- Average humidity in January: 74%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (70%).
Average rainfall in January
Ashburn, VA
- Average rainfall in January: 2.13"
The wettest month (with the highest rainfall) is August (3.78").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in January
Ashburn, VA
- Average rainfall days in January: 9.3 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in January
Ashburn, VA
- Average snowfall in January: 3.54"
The month with the highest snowfall is January (3.54").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Ashburn, VA
- Average snowfall days in January: 5.1 days
The months with the highest number of snowfall days are January and February (5.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Ashburn, VA
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 0min).
Average sunshine days in January
Ashburn, VA
- Average sunshine days in January: 17.2 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (11.8 days).
Average UV index in January
Ashburn, 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, November and December (UV index 2).
Average cloud cover in January
Ashburn, VA
- Average cloud cover in January: 46
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in January
Ashburn, 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).
Ashburn, Virginia, USA
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