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
In Denville, the month of January registers the lowest temperatures, averaging 34.5°F (1.4°C) at the peak and 21.6°F (-5.8°C) at the lowest.Humidity
The average relative humidity in January is 77%.Rainfall
In Denville, New Jersey, in January, it is raining for 8.2 days, with typically 2.28" (58mm) of accumulated precipitation. In Denville, during the entire year, the rain falls for 161.2 days and collects up to 33.74" (857mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Denville, in January, snow falls for 8.5 days, with typically accumulated 2.91" (74mm) of snow. Throughout the year, there are 30.9 snowfall days, and 15.79" (401mm) of snow is accumulated.Daylight
In January, the average length of the day in Denville, New Jersey, is 9h and 38min.On the first day of the month, sunrise is at 7:22 am and sunset at 4:40 pm. On the last day of January, sunrise is at 7:09 am and sunset at 5:13 pm EST.
Sunshine
The average sunshine in January is 4.8h.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 estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: An average UV index of 2 in January transforms into 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. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Denville?
How cold is it in Denville in January?
What is the average humidity in January in Denville?
How much does it rain in Denville in January?
How many days does it snow in January in Denville?
What is the average length of the day in January in Denville?
When are sunrise and sunset in January in Denville?
How long on average sun shines in January in Denville?
What is the month with the lowest UV index in Denville?
What is the UV index intensity in January in Denville?
Average temperature in January
Denville, NJ
- Average high temperature in January: 34.5°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (34.5°F).
- Average low temperature in January: 21.6°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in January
Denville, 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
Denville, NJ
- Average wind speed in January: 8.1mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in January
Denville, 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
Denville, NJ
- Average rainfall in January: 2.28"
The wettest month (with the highest rainfall) is December (3.43").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in January
Denville, NJ
- Average rainfall days in January: 8.2 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in January
Denville, NJ
- Average snowfall in January: 2.91"
The month with the highest snowfall is March (4.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Denville, NJ
- Average snowfall days in January: 8.5 days
The month with the highest number of snowfall days is February (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Denville, 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 24min).
Average sunshine days in January
Denville, NJ
- Average sunshine days in January: 16.5 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is April (11.2 days).
Average UV index in January
Denville, 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
Denville, NJ
- Average cloud cover in January: 47
The months with the most cloud cover are February, March and December (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 35).
Average visibility in January
Denville, NJ
- Average visibility in January: 6mi
The months with the highest visibility are January, April, July, August, October, November and December (6mi).
The months with the lowest visibility are February, March, May, June and September (5mi).
Denville, New Jersey, USA
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