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
With average high temperatures of 34.9°F (1.6°C) and lows of 22.5°F (-5.3°C), January is the coldest month.Humidity
The average relative humidity in January is 77%.Rainfall
The months with the least rainfall are January, February and September Rain falls for 8.3 days and accumulates 1.57" (40mm) of rain.Snowfall
January through May, November and December are months with snowfall. In Cedar Knolls, New Jersey, in January, snow falls for 6.6 days, with typically accumulated 1.77" (45mm) of snow. Throughout the year, there are 24 snowfall days, and 9.72" (247mm) of snow is accumulated.Daylight
In Cedar Knolls, the average length of the day in January is 9h and 38min.On the first day of January, sunrise is at 7:22 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 5:13 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 reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 2 during January morphs into the following directions:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Stay sun-safe with clothing that is both closely woven and worn loosely. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
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?
What is the average length of the day in January?
What time are sunrise and sunset in January?
How many hours of sunshine does Cedar Knolls have in January?
When is the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Cedar Knolls, NJ
- Average high temperature in January: 34.9°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 (34.9°F).
- Average low temperature in January: 22.5°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in January
Cedar Knolls, 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
Cedar Knolls, NJ
- Average wind speed in January: 8.3mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in January
Cedar Knolls, NJ
- Average humidity in January: 77%
The months with the highest relative humidity are February, October and December (80%).
The month with the lowest relative humidity is April (74%).
Average rainfall in January
Cedar Knolls, NJ
- Average rainfall in January: 1.57"
The wettest month (with the highest rainfall) is July (3.19").
The driest months (with the least rainfall) are January, February and September (1.57").
Average rainfall days in January
Cedar Knolls, NJ
- Average rainfall days in January: 8.3 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in January
Cedar Knolls, NJ
- Average snowfall in January: 1.77"
The month with the highest snowfall is March (3.7").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in January
Cedar Knolls, NJ
- Average snowfall days in January: 6.6 days
The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Cedar Knolls, 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 36min).
Average sunshine days in January
Cedar Knolls, NJ
- Average sunshine days in January: 18.3 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (10.9 days).
Average UV index in January
Cedar Knolls, 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
Cedar Knolls, NJ
- Average cloud cover in January: 46
The months with the most cloud cover are February, March and December (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in January
Cedar Knolls, NJ
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, July, August, October, November and December (6mi).
The months with the lowest visibility are May, June and September (5mi).
Cedar Knolls, New Jersey, USA
Weather forecast for your location
2. Allow the app to use your location