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 32.7°F (0.4°C) and a minimum temperature of 19.8°F (-6.8°C).Humidity
In January, the average relative humidity is 79%.Rainfall
In January, the rain falls for 8.7 days. Throughout January, 2.09" (53mm) of precipitation is accumulated. Throughout the year, there are 164.9 rainfall days, and 31.89" (810mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Sussex, in January, during 9.8 snowfall days, 4.45" (113mm) of snow is typically accumulated. Throughout the year, there are 36.9 snowfall days, and 19.84" (504mm) of snow is accumulated.Daylight
In January, the average length of the day is 9h and 37min.On the first day of January, sunrise is at 7:23 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:13 pm EST.
Sunshine
In Sussex, the average sunshine in January is 4.7h.UV index
In January, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 2 in January interprets into the following recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
How cold is it in January?
What is the average humidity in January?
How much does it rain in January?
How much does it snow in Sussex in January?
How many hours of daylight does Sussex have in January?
What time are sunrise and sunset in January?
How many hours of sunshine does Sussex have in January?
What is the UV index intensity in January?
Average temperature in January
Sussex, NJ
- Average high temperature in January: 32.7°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (32.7°F).
- Average low temperature in January: 19.8°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in January
Sussex, 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
Sussex, NJ
- Average wind speed in January: 7.6mph
The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in January
Sussex, NJ
- Average humidity in January: 79%
The months with the highest relative humidity are February, October and December (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall in January
Sussex, NJ
- Average rainfall in January: 2.09"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in January
Sussex, NJ
- Average rainfall days in January: 8.7 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is January (8.7 days).
Average snowfall in January
Sussex, NJ
- Average snowfall in January: 4.45"
The month with the highest snowfall is February (5.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Sussex, NJ
- Average snowfall days in January: 9.8 days
The months with the highest number of snowfall days are January and February (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Sussex, 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in January
Sussex, NJ
- Average sunshine days in January: 16.8 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is April (10.4 days).
Average UV index in January
Sussex, NJ
- Average UV index in January: 2
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Sussex, NJ
- Average cloud cover in January: 48
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in January
Sussex, NJ
- Average visibility in January: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Sussex, New Jersey, USA
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