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
South Plainfield witnesses the coldest weather in January, with temperatures averaging a high of 36°F (2.2°C) and a low of 23.9°F (-4.5°C).Humidity
In January, the average relative humidity is 75%.Rainfall
In January, the rain falls for 9.5 days. Throughout January, 1.97" (50mm) of precipitation is accumulated. Throughout the year, there are 160.7 rainfall days, and 30.12" (765mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In January, it is snowing for 7.3 days. Throughout January, 2.09" (53mm) of snow is accumulated. In South Plainfield, during the entire year, snow falls for 25.4 days and aggregates up to 10.31" (262mm) of snow.Daylight
In South Plainfield, the average length of the day in January is 9h and 40min.On the first day of January, sunrise is at 7:21 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:13 pm EST.
Sunshine
In January, the average sunshine is 5.1h.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 reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index, 2 in January, converts into the following recommendations:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
How cold is January?
What is the average humidity in January?
How many days does it rain in January in South Plainfield?
How many days does it snow in January?
How many hours of daylight does South Plainfield have in January?
When is the sunrise / sunset in January?
How long on average sun shines in January?
What is the month with the lowest UV index?
How high is the UV index in January?
Average temperature in January
South Plainfield, NJ
- Average high temperature in January: 36°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 (36°F).
- Average low temperature in January: 23.9°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).
Average pressure in January
South Plainfield, 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
South Plainfield, NJ
- Average wind speed in January: 8.8mph
The windiest month (with the highest average wind speed) is March (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in January
South Plainfield, NJ
- Average humidity in January: 75%
The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April and August (73%).
Average rainfall in January
South Plainfield, NJ
- Average rainfall in January: 1.97"
The wettest month (with the highest rainfall) is December (3.19").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in January
South Plainfield, NJ
- Average rainfall days in January: 9.5 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (9.5 days).
Average snowfall in January
South Plainfield, NJ
- Average snowfall in January: 2.09"
The month with the highest snowfall is March (3.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
South Plainfield, NJ
- Average snowfall days in January: 7.3 days
The months with the highest number of snowfall days are January and February (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
South Plainfield, 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in January
South Plainfield, NJ
- Average sunshine days in January: 17.3 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in January
South Plainfield, 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
South Plainfield, NJ
- Average cloud cover in January: 45
The months with the most cloud cover are February, March and December (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in January
South Plainfield, NJ
- 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).
South Plainfield, New Jersey, USA
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