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 stands out as Jefferson's coldest month, with temperatures ranging between an average high of 40.5°F (4.7°C) and a low of 27.1°F (-2.7°C).Humidity
The average relative humidity in January is 72%.Rainfall
January is the month with the least rainfall in Jefferson. Rain falls for 9.8 days and accumulates 2.05" (52mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Jefferson. January is the month with the most snowfall in Jefferson. Snow falls for 4.9 days and accumulates 3.31" (84mm) of snow.Daylight
The average length of the day in January in Jefferson is 9h and 46min.On the first day of the month, sunrise is at 7:29 am and sunset at 4:57 pm. On the last day of January, sunrise is at 7:18 am and sunset at 5:28 pm EST.
Sunshine
The months with the least sunshine are January, February and December, with an average of 5.2h of sunshine.UV index
The months with the lowest UV index in Jefferson are January, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In January, the maximum UV index of 2 suggests these recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Frequently asked questions
What is the coldest month in Jefferson?
Is January cold in Jefferson?
What is the average humidity in January in Jefferson?
What is the driest month in Jefferson?
How many days does it rain in January in Jefferson?
What is the snowiest month in Jefferson?
How much does it snow in Jefferson in January?
What is the average length of the day in January in Jefferson?
When are sunrise and sunset in January in Jefferson?
What is the month with the least sunshine in Jefferson?
How many hours of sunshine does Jefferson have in January?
When is the lowest UV index in Jefferson?
How high is the UV index in January in Jefferson?
Average temperature in January
Jefferson, MD
- Average high temperature in January: 40.5°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (40.5°F).
- Average low temperature in January: 27.1°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 (27.1°F).
Average pressure in January
Jefferson, MD
- 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
Jefferson, MD
- Average wind speed in January: 7.2mph
The windiest month (with the highest average wind speed) is March (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in January
Jefferson, MD
- Average humidity in January: 72%
The month with the highest relative humidity is October (77%).
The months with the lowest relative humidity are April and July (71%).
Average rainfall in January
Jefferson, MD
- Average rainfall in January: 2.05"
The wettest month (with the highest rainfall) is August (3.78").
The driest month (with the least rainfall) is January (2.05").
Average rainfall days in January
Jefferson, MD
- Average rainfall days in January: 9.8 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (8.9 days).
Average snowfall in January
Jefferson, MD
- Average snowfall in January: 3.31"
The month with the highest snowfall is January (3.31").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Jefferson, MD
- Average snowfall days in January: 4.9 days
The month with the highest number of snowfall days is January (4.9 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
Jefferson, MD
- 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 24min).
- Average sunshine in January: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 12min).
Average sunshine days in January
Jefferson, MD
- Average sunshine days in January: 17.9 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is July (10.9 days).
Average UV index in January
Jefferson, MD
- 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, November and December (UV index 2).
Average cloud cover in January
Jefferson, MD
- 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
Jefferson, MD
- 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).
Jefferson, Maryland, USA
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