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 35.2°F (1.8°C) and a low of 22.8°F (-5.1°C), is recognized as the coldest.Humidity
In January, the average relative humidity in Hillsdale is 76%.Rainfall
In Hillsdale, in January, during 8.4 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. Throughout the year, in Hillsdale, there are 157.3 rainfall days, and 32.72" (831mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In Hillsdale, during January, snow falls for 7.3 days and regularly aggregates up to 2.8" (71mm) of snow. Throughout the year, there are 28 snowfall days, and 13.82" (351mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 38min.On the first day of January, sunrise is at 7:20 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 5:11 pm EST.
Sunshine
In January, the average sunshine in Hillsdale is 4.9h.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 estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In January, the maximum UV index of 2 suggests this advice:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Hillsdale?
How cold is January in Hillsdale?
What is the average humidity in January in Hillsdale?
How much does it rain in Hillsdale in January?
How much does it snow in Hillsdale in January?
What is the average length of the day in January in Hillsdale?
What time are sunrise and sunset in January in Hillsdale?
How long on average sun shines in January in Hillsdale?
What are the months with the lowest UV index in Hillsdale?
How high is the UV index in January in Hillsdale?
Average temperature in January
Hillsdale, NJ
- Average high temperature in January: 35.2°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in January: 22.8°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).
Average pressure in January
Hillsdale, 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
Hillsdale, NJ
- Average wind speed in January: 7.9mph
The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in January
Hillsdale, NJ
- Average humidity in January: 76%
The months with the highest relative humidity are February and December (78%).
The month with the lowest relative humidity is August (70%).
Average rainfall in January
Hillsdale, NJ
- Average rainfall in January: 2.28"
The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in January
Hillsdale, NJ
- Average rainfall days in January: 8.4 days
The months with the highest number of rainy days are May and July (16.8 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in January
Hillsdale, NJ
- Average snowfall in January: 2.8"
The month with the highest snowfall is February (4.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Hillsdale, NJ
- Average snowfall days in January: 7.3 days
The month with the highest number of snowfall days is February (7.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Hillsdale, 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 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in January
Hillsdale, NJ
- Average sunshine days in January: 17.6 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (11.5 days).
Average UV index in January
Hillsdale, 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
Hillsdale, NJ
- Average cloud cover in January: 46
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in January
Hillsdale, NJ
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Hillsdale, New Jersey, USA
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