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 proves to be the coldest month, recording an average maximum temperature of 33.3°F (0.7°C) and a minimum temperature of 20.7°F (-6.3°C).Humidity
In January, the average relative humidity is 78%.Rainfall
January, February and September are months with the least rain when the rain falls for 6.9 days and typically aggregates up to 1.54" (39mm) of rain.Snowfall
January through May, October through December are months with snowfall. In Hewitt, in January, snow falls for 7.8 days, with typically accumulated 3.94" (100mm) of snow. Throughout the year, in Hewitt, there are 32 snowfall days, and 17.05" (433mm) of snow is accumulated.Daylight
In Hewitt, the average length of the day in January is 9h and 37min.On the first day of the month, sunrise is at 7:22 am and sunset at 4:39 pm. On the last day of January, sunrise is at 7:09 am and sunset at 5:12 pm EST.
Sunshine
In January, the average sunshine is 4.9h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability 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:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. A hat with a broad brim is indispensable, filtering out up to half of UV rays. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
How cold is January?
What is the average humidity in January?
What is the driest month?
How many days does it rain in January?
How many days does it snow in January?
How many hours of daylight does Hewitt have in January?
When is the sunrise / sunset in January?
How many hours of sunshine does Hewitt have in January?
When is the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Hewitt, NJ
- Average high temperature in January: 33.3°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in January: 20.7°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in January
Hewitt, NJ
- Average pressure in January: 30.06"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
Hewitt, NJ
- Average wind speed in January: 7.6mph
The windiest months (with the highest average wind speed) are January, February and March (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in January
Hewitt, NJ
- Average humidity in January: 78%
The months with the highest relative humidity are February, October and December (81%).
The month with the lowest relative humidity is April (75%).
Average rainfall in January
Hewitt, NJ
- Average rainfall in January: 1.54"
The wettest month (with the highest rainfall) is July (2.95").
The driest months (with the least rainfall) are January, February and September (1.54").
Average rainfall days in January
Hewitt, NJ
- Average rainfall days in January: 6.9 days
The month with the highest number of rainy days is July (17.5 days).
The month with the least rainy days is January (6.9 days).
Average snowfall in January
Hewitt, NJ
- Average snowfall in January: 3.94"
The month with the highest snowfall is February (4.37").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Hewitt, NJ
- Average snowfall days in January: 7.8 days
The month with the highest number of snowfall days is February (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Hewitt, NJ
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in January
Hewitt, NJ
- Average sunshine days in January: 18.6 days
The months with the most sunshine days are January and November (18.6 days).
The months with the least sunshine days are June and July (11.3 days).
Average UV index in January
Hewitt, 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
Hewitt, NJ
- Average cloud cover in January: 46
The months with the most cloud cover are February and March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in January
Hewitt, NJ
- Average visibility in January: 5mi
The months with the highest visibility are April, August, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, September and October (5mi).
Hewitt, New Jersey, USA
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