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 is the month when Somerville sees the lowest average temperatures, with a high of 35.6°F (2°C) and a low of 23.2°F (-4.9°C).Humidity
In January, the average relative humidity is 76%.Rainfall
In Somerville, during January, the rain falls for 9.2 days and regularly aggregates up to 1.81" (46mm) of precipitation. Throughout the year, there are 157.9 rainfall days, and 28.19" (716mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Somerville, in January, during 6.8 snowfall days, 1.97" (50mm) of snow is typically accumulated. In Somerville, during the entire year, snow falls for 23.8 days and aggregates up to 9.53" (242mm) of snow.Daylight
In January, the average length of the day is 9h and 40min.On the first day of the month, sunrise is at 7:21 am and sunset at 4:41 pm. On the last day of January, in Somerville, sunrise is at 7:09 am and sunset at 5:14 pm EST.
Sunshine
The average sunshine in January is 5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 2 during January translates into these guidelines:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. During bright days, sunglasses that offer UVA and UVB defense are recommended. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest in Somerville?
How cold is January?
What is the average humidity in January?
How many days does it rain in January?
How much does it snow in January?
How many hours of daylight does Somerville have in January?
When are sunrise and sunset in January in Somerville?
How many hours of sunshine does Somerville have in January?
What is the month with the lowest UV index?
How high is the UV index in January in Somerville?
Average temperature in January
Somerville, NJ
- Average high temperature in January: 35.6°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in January: 23.2°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in January
Somerville, NJ
- Average pressure in January: 30.07"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
Somerville, NJ
- Average wind speed in January: 8.3mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in January
Somerville, NJ
- Average humidity in January: 76%
The months with the highest relative humidity are February, October and December (79%).
The month with the lowest relative humidity is April (74%).
Average rainfall in January
Somerville, NJ
- Average rainfall in January: 1.81"
The wettest month (with the highest rainfall) is December (2.91").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in January
Somerville, NJ
- Average rainfall days in January: 9.2 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (9 days).
Average snowfall in January
Somerville, NJ
- Average snowfall in January: 1.97"
The month with the highest snowfall is March (2.83").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Somerville, NJ
- Average snowfall days in January: 6.8 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Somerville, NJ
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in January
Somerville, NJ
- Average sunshine days in January: 18.2 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (11.7 days).
Average UV index in January
Somerville, NJ
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in January
Somerville, NJ
- Average cloud cover in January: 45
The months with the most cloud cover are February and December (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in January
Somerville, NJ
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Somerville, New Jersey, USA
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