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 sea temperature 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, characterized by an average high temperature of 36.9°F (2.7°C) and a low temperature of 25.9°F (-3.4°C), is generally the coldest month.Humidity
In January, the average relative humidity in Sewaren is 74%.Rainfall
In Sewaren, New Jersey, in January, it is raining for 9.3 days, with typically 2.01" (51mm) of accumulated precipitation. Throughout the year, in Sewaren, there are 157.5 rainfall days, and 31.42" (798mm) of precipitation is accumulated.Snowfall
Months with snowfall in Sewaren are January through April, October through December. In Sewaren, in January, during 5.8 snowfall days, 1.57" (40mm) of snow is typically accumulated. In Sewaren, during the entire year, snow falls for 19.5 days and aggregates up to 8.35" (212mm) of snow.Ocean temperature
In Sewaren, in January, the average water temperature is 41.7°F (5.4°C).Note: Diving into 41.7°F (5.4°C) is practical below 50°F (10°C), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Merely touching waters at 55.4°F (13°C) feels ice-cold.
Daylight
In Sewaren, New Jersey, the average length of the day in January is 9h and 40min.On the first day of January in Sewaren, sunrise is at 7:20 am and sunset at 4:40 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 in Sewaren 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 vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In January, the UV index of 2 transforms into the following advice:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. To cut down UV radiation exposure by about half, sport a wide-brim hat. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest in Sewaren?
How cold is January in Sewaren?
What is the average humidity in January in Sewaren?
How many days does it rain in January in Sewaren?
How many days does it snow in January in Sewaren?
How cold is the water in January in Sewaren?
How many hours of daylight does Sewaren have in January?
When are sunrise and sunset in January in Sewaren?
How long on average sun shines in January in Sewaren?
What is the month with the lowest UV index in Sewaren?
What is the UV index reading in January in Sewaren?
Average temperature in January
Sewaren, NJ
- Average high temperature in January: 36.9°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in January: 25.9°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).
Average pressure in January
Sewaren, 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
Sewaren, NJ
- Average wind speed in January: 10.2mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in January
Sewaren, NJ
- Average humidity in January: 74%
The months with the highest relative humidity are February and May (77%).
The months with the lowest relative humidity are March, April, August and November (73%).
Average rainfall in January
Sewaren, NJ
- Average rainfall in January: 2.01"
The wettest months (with the highest rainfall) are July and December (3.31").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in January
Sewaren, NJ
- Average rainfall days in January: 9.3 days
The month with the highest number of rainy days is July (16.2 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in January
Sewaren, NJ
- Average snowfall in January: 1.57"
The month with the highest snowfall is March (3.39").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Sewaren, NJ
- Average snowfall days in January: 5.8 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in January
Sewaren, NJ
- Average sea temperature in January: 41.7°F
The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).
Average daylight in January /
Average sunshine in January
Sewaren, 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 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in January
Sewaren, NJ
- Average sunshine days in January: 17.3 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is June (12.2 days).
Average UV index in January
Sewaren, 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
Sewaren, NJ
- Average cloud cover in January: 45
The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in January
Sewaren, 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).
Sewaren, New Jersey, USA
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