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
The month of January, characterized by an average high of 34.3°F (1.3°C) and a low of 21.7°F (-5.7°C), is recognized as the coldest.Humidity
In January, the average relative humidity is 77%.Rainfall
In Mahwah, during January, the rain falls for 7.8 days and regularly aggregates up to 1.61" (41mm) of precipitation. Throughout the year, in Mahwah, there are 150.6 rainfall days, and 25.12" (638mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Mahwah, in January, snow falls for 7.1 days, with typically accumulated 2.28" (58mm) of snow. Throughout the year, there are 28.5 snowfall days, and 10.98" (279mm) 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 7:21 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:11 pm EST.
Sunshine
The average sunshine in January is 5h.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 of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In January, a daily UV index of 2 turns into the following recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
How cold is January?
What is the average humidity in January?
How much does it rain in January?
How many days does it snow in January?
What is the average length of the day in January?
When is the sunrise / sunset in January?
How many hours of sunshine does Mahwah have in January?
What are the months with the lowest UV index?
How high is the UV index in January in Mahwah?
Average temperature in January
Mahwah, NJ
- Average high temperature in January: 34.3°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in January: 21.7°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in January
Mahwah, NJ
- Average pressure in January: 30.06"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
Mahwah, 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 (5mph).
Average humidity in January
Mahwah, NJ
- Average humidity in January: 77%
The months with the highest relative humidity are February and December (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall in January
Mahwah, NJ
- Average rainfall in January: 1.61"
The wettest month (with the highest rainfall) is December (2.68").
The driest month (with the least rainfall) is September (1.34").
Average rainfall days in January
Mahwah, NJ
- Average rainfall days in January: 7.8 days
The month with the highest number of rainy days is July (16.6 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in January
Mahwah, NJ
- Average snowfall in January: 2.28"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Mahwah, NJ
- Average snowfall days in January: 7.1 days
The month with the highest number of snowfall days is February (7.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Mahwah, 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: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in January
Mahwah, NJ
- Average sunshine days in January: 18.1 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in January
Mahwah, 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
Mahwah, NJ
- Average cloud cover in January: 45
The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in January
Mahwah, NJ
- Average visibility in January: 6mi
The months with the highest visibility are January, March, April, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are February and May (5mi).
Mahwah, New Jersey, USA
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