January weather forecastVienna, VA
January
Weather in January
January, like December, in Vienna, Virginia, is an icy winter month, with an average temperature fluctuating between 40.5°F (4.7°C) and 26.4°F (-3.1°C).Temperature
Vienna experiences its lowest temperatures in January, with an average peak of 40.5°F (4.7°C) and a low of 26.4°F (-3.1°C).Humidity
In January, the average relative humidity is 73%.Rainfall
In Vienna, in January, it is raining for 10.4 days, with typically 2.09" (53mm) of accumulated precipitation. In Vienna, during the entire year, the rain falls for 162 days and collects up to 31.65" (804mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. The month with the most snowfall is January, when snow falls for 5.6 days and typically aggregates up to 3.54" (90mm) of snow.Daylight
The average length of the day in January is 9h and 49min.On the first day of the month, sunrise is at 7:27 am and sunset at 4:57 pm. On the last day of January, sunrise is at 7:16 am and sunset at 5:28 pm EST.
Sunshine
January, February and December, with an average of 5.2h of sunshine, are months with the least sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for average individuals.Note: A typical high UV index of 2 in January suggests the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Vienna, VA
- Average high temperature in January: 40.5°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.5°F).
- Average low temperature in January: 26.4°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).
Average pressure in January
Vienna, 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
Vienna, VA
- Average wind speed in January: 7.1mph
The windiest month (with the highest average wind speed) is March (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in January
Vienna, VA
- Average humidity in January: 73%
The months with the highest relative humidity are October and December (77%).
The month with the lowest relative humidity is July (71%).
Average rainfall in January
Vienna, VA
- Average rainfall in January: 2.09"
The wettest month (with the highest rainfall) is August (3.78").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in January
Vienna, VA
- Average rainfall days in January: 10.4 days
The months with the highest number of rainy days are May and August (17.3 days).
The month with the least rainy days is November (9.1 days).
Average snowfall in January
Vienna, 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
Vienna, VA
- Average snowfall days in January: 5.6 days
The month with the highest number of snowfall days is January (5.6 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
Vienna, VA
- Average daylight in January: 9h and 48min
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 12min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 12min).
Average sunshine days in January
Vienna, VA
- Average sunshine days in January: 17.4 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in January
Vienna, 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
Vienna, VA
- Average cloud cover in January: 44
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 in January
Vienna, 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).
