January weather forecastDelaware, NJ
January
Weather in January
January, the same as December, is another cold winter month in Delaware, New Jersey, with an average temperature fluctuating between 19.8°F (-6.8°C) and 32.5°F (0.3°C).Temperature
The month of January, characterized by an average high of 32.5°F (0.3°C) and a low of 19.8°F (-6.8°C), is recognized as the coldest.Humidity
In January, the average relative humidity is 79%.Rainfall
In Delaware, New Jersey, in January, it is raining for 9.6 days, with typically 2.24" (57mm) of accumulated precipitation. Throughout the year, in Delaware, there are 165.9 rainfall days, and 31.61" (803mm) of precipitation is accumulated.Snowfall
Months with snowfall in Delaware are January through May, October through December. In January, it is snowing for 11.4 days. Throughout January, 5.28" (134mm) of snow is accumulated. In Delaware, during the entire year, snow falls for 42.7 days and aggregates up to 21.26" (540mm) of snow.Daylight
The average length of the day in January in Delaware is 9h and 38min.On the first day of the month, sunrise is at 7:24 am and sunset at 4:42 pm. On the last day of January, in Delaware, sunrise is at 7:11 am and sunset at 5:15 pm EST.
Sunshine
In Delaware, the average sunshine in January is 4.7h.UV index
In January, the average daily maximum UV index in Delaware is 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: A daily maximum UV index of 2 in January translates into the following instructions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Delaware, NJ
- Average high temperature in January: 32.5°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in January: 19.8°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in January
Delaware, 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
Delaware, NJ
- Average wind speed in January: 7.8mph
The windiest months (with the highest average wind speed) are January, February and March (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in January
Delaware, 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
Delaware, NJ
- Average rainfall in January: 2.24"
The wettest month (with the highest rainfall) is July (3.11").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in January
Delaware, NJ
- Average rainfall days in January: 9.6 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is February (9.5 days).
Average snowfall in January
Delaware, NJ
- Average snowfall in January: 5.28"
The month with the highest snowfall is February (5.67").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Delaware, NJ
- Average snowfall days in January: 11.4 days
The month with the highest number of snowfall days is January (11.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Delaware, NJ
- Average daylight in January: 9h and 36min
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 42min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in January
Delaware, NJ
- Average sunshine days in January: 15 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in January
Delaware, NJ
- Average UV index in January: 2
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Delaware, NJ
- Average cloud cover in January: 49
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in January
Delaware, NJ
- Average visibility in January: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
