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 River's coldest month, January, registers temperatures that range from a high of 36.9°F (2.7°C) to a low of 25.7°F (-3.5°C).Humidity
The average relative humidity in January is 75%.Rainfall
In South River, during January, the rain falls for 8.5 days and regularly aggregates up to 1.85" (47mm) of precipitation. Throughout the year, there are 154 rainfall days, and 30.75" (781mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In January, it is snowing for 5 days. Throughout January, 1.69" (43mm) of snow is accumulated. In South River, during the entire year, snow falls for 18.1 days and aggregates up to 8.35" (212mm) of snow.Daylight
In January, the average length of the day is 9h and 41min.On the first day of January, sunrise is at 7:20 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:07 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 in South River. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In January, an average UV index of 2 transforms into the following instructions:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
How cold is it in South River in January?
What is the average humidity in January?
How much does it rain in January?
How many days does it snow in January?
How many hours of daylight does South River have in January?
When is the sunrise / sunset in January?
How long on average sun shines in January?
What are the months with the lowest UV index?
How high is the UV index in January?
Average temperature in January
South River, NJ
- Average high temperature in January: 36.9°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in January: 25.7°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in January
South River, 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 River, NJ
- Average wind speed in January: 9.6mph
The windiest months (with the highest average wind speed) are January and March (9.6mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in January
South River, NJ
- Average humidity in January: 75%
The months with the highest relative humidity are February, May, October and December (77%).
The months with the lowest relative humidity are April and August (73%).
Average rainfall in January
South River, NJ
- Average rainfall in January: 1.85"
The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in January
South River, NJ
- Average rainfall days in January: 8.5 days
The month with the highest number of rainy days is July (17.4 days).
The months with the least rainy days are January and November (8.5 days).
Average snowfall in January
South River, NJ
- Average snowfall in January: 1.69"
The month with the highest snowfall is March (3.82").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
South River, NJ
- Average snowfall days in January: 5 days
The month with the highest number of snowfall days is February (5.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
South River, 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 42min).
Average sunshine days in January
South River, NJ
- Average sunshine days in January: 18.6 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is July (10.5 days).
Average UV index in January
South River, NJ
- 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, February, March, November and December (UV index 2).
Average cloud cover in January
South River, NJ
- Average cloud cover in January: 44
The months with the most cloud cover are February and December (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in January
South River, NJ
- 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).
South River, New Jersey, USA
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