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
The month of January, characterized by an average high of 40.6°F and a low of 27.5°F, is recognized as the coldest.Humidity
In Washington, the average relative humidity in January is 72%.Rainfall
January is the month with the least rainfall in Washington, District of Columbia. Rain falls for 9.3 days and accumulates 1.57" of precipitation.Snowfall
January through March and December are months with snowfall in Washington. The month with the most snowfall in Washington, District of Columbia, is January, when snow falls for 3.8 days and typically aggregates up to 2.17" of snow.Daylight
In Washington, the average length of the day in January is 9h and 49min.On the first day of the month, sunrise is at 7:26 am and sunset at 4:56 pm. On the last day of January, in Washington, District of Columbia, sunrise is at 7:15 am and sunset at 5:28 pm EST.
Sunshine
January, February and December, with an average of 5.1h of sunshine, are months with the least sunshine.UV index
January 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 minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: The UV index of 2 in January translates into these instructions:
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. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
FAQ
What part of the year is the coldest in Washington?
How cold is January in Washington?
What is the average humidity in January in Washington?
What is the driest month in Washington?
How many days does it rain in January in Washington?
What is the snowiest month in Washington?
How much does it snow in Washington in January?
How many hours of daylight does Washington have in January?
When is the sunrise / sunset in January in Washington?
What is the month with the least sunshine in Washington?
How long on average sun shines in January in Washington?
What is the month with the lowest UV index in Washington?
What is the UV index reading in January in Washington?
Average temperature in January
Washington, DC
- Average high temperature in January: 40.6°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.6°F).
- Average low temperature in January: 27.5°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 (27.5°F).
Average pressure in January
Washington, DC
- 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
Washington, DC
- Average wind speed in January: 7.6mph
The windiest month (with the highest average wind speed) is March (7.9mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in January
Washington, DC
- Average humidity in January: 72%
The month with the highest relative humidity is May (76%).
The months with the lowest relative humidity are April and July (71%).
Average rainfall in January
Washington, DC
- Average rainfall in January: 1.57"
The wettest month (with the highest rainfall) is August (3.46").
The driest month (with the least rainfall) is January (1.57").
Average rainfall days in January
Washington, DC
- Average rainfall days in January: 9.3 days
The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is November (8.1 days).
Average snowfall in January
Washington, DC
- Average snowfall in January: 2.17"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in January
Washington, DC
- Average snowfall days in January: 3.8 days
The months with the highest number of snowfall days are January and February (3.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Washington, DC
- 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 1min
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 6min).
Average sunshine days in January
Washington, DC
- Average sunshine days in January: 18.2 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (12.8 days).
Average UV index in January
Washington, DC
- Average UV index in January: 2
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in January
Washington, DC
- Average cloud cover in January: 43
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
Washington, DC
- 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).
Washington, District of Columbia, USA
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