January weather forecastGreenbelt, MD
January
Weather in January
The city of Greenbelt awakens to a new year under conditions typical of a Maryland winter. January weather features cold temperatures, with an average high of 39.9°F (4.4°C) and a low of 27.7°F (-2.4°C). Relative humidity and cloud cover are usually at their most during this month, resulting in foggy mornings and cloudy days. Comparing to February, a very minor increase in temperature is expected. However, residents are advised to brace for cold winds when venturing outdoors, winter clothing is a must.Temperature
January is the month when Greenbelt sees the lowest average temperatures, with a high of 39.9°F (4.4°C) and a low of 27.7°F (-2.4°C).Humidity
In Greenbelt, the average relative humidity in January is 72%.Rainfall
The month with the least rainfall is January, when the rain falls for 9.3 days and typically collects 2.01" (51mm) of precipitation.Snowfall
January through April and December are months with snowfall. January is the month with the most snowfall. Snow falls for 4.1 days and accumulates 2.6" (66mm) of snow.Daylight
The average length of the day in January in Greenbelt is 9h and 48min.On the first day of the month, sunrise is at 7:26 am and sunset at 4:55 pm. On the last day of January, sunrise is at 7:14 am and sunset at 5:26 pm EST.
Sunshine
In January, the average sunshine is 5.1h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In January, a daily maximum UV index of 2 leads to the following instructions:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Greenbelt, MD
- Average high temperature in January: 39.9°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 (39.9°F).
- Average low temperature in January: 27.7°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).
Average pressure in January
Greenbelt, 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 (29.94"Hg).
Average wind speed in January
Greenbelt, MD
- Average wind speed in January: 7.9mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in January
Greenbelt, MD
- Average humidity in January: 72%
The months with the highest relative humidity are May, October and December (76%).
The months with the lowest relative humidity are April and July (71%).
Average rainfall in January
Greenbelt, MD
- Average rainfall in January: 2.01"
The wettest month (with the highest rainfall) is August (3.58").
The driest month (with the least rainfall) is January (2.01").
Average rainfall days in January
Greenbelt, MD
- Average rainfall days in January: 9.3 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is November (9 days).
Average snowfall in January
Greenbelt, MD
- Average snowfall in January: 2.6"
The month with the highest snowfall is January (2.6").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days in January
Greenbelt, MD
- Average snowfall days in January: 4.1 days
The month with the highest number of snowfall days is January (4.1 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
Greenbelt, MD
- 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 6min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in January
Greenbelt, MD
- Average sunshine days in January: 18.6 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in January
Greenbelt, 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 and December (UV index 2).
Average cloud cover in January
Greenbelt, 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 29).
Average visibility in January
Greenbelt, MD
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
