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, noted for its average high-temperature of 35.2°F (1.8°C) and an average low-temperature of 23.9°F (-4.5°C), is considered the coldest month.Humidity
In January, the average relative humidity is 75%.Rainfall
The month with the least rainfall is January, when the rain falls for 7.6 days and typically collects 1.38" (35mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In January, it is snowing for 5.8 days. Throughout January, 1.65" (42mm) of snow is accumulated. In Montclair, during the entire year, snow falls for 22.1 days and aggregates up to 8.9" (226mm) of snow.Daylight
In January, the average length of the day is 9h and 38min.On the first day of January, sunrise is at 7:21 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:12 pm EST.
Sunshine
In January, the average sunshine is 5.1h.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 minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 2 during January leads to these advisories:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
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 in Montclair?
What is the driest month?
How much does it rain in January?
How much 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 Montclair have in January?
When is the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Montclair, NJ
- Average high temperature in January: 35.2°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 (35.2°F).
- Average low temperature in January: 23.9°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).
Average pressure in January
Montclair, 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
Montclair, NJ
- Average wind speed in January: 8.8mph
The windiest months (with the highest average wind speed) are January and March (8.8mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity in January
Montclair, NJ
- Average humidity in January: 75%
The month with the highest relative humidity is February (78%).
The months with the lowest relative humidity are April and August (72%).
Average rainfall in January
Montclair, NJ
- Average rainfall in January: 1.38"
The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is January (1.38").
Average rainfall days in January
Montclair, NJ
- Average rainfall days in January: 7.6 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (7.6 days).
Average snowfall in January
Montclair, NJ
- Average snowfall in January: 1.65"
The month with the highest snowfall is March (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Montclair, NJ
- Average snowfall days in January: 5.8 days
The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Montclair, 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in January
Montclair, NJ
- Average sunshine days in January: 19.3 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in January
Montclair, 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
Montclair, NJ
- Average cloud cover in January: 44
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in January
Montclair, 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).
Montclair, New Jersey, USA
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