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
Temperature records mark January as the coldest month, with highs averaging 35.1°F (1.7°C) and lows at 22.3°F (-5.4°C).Humidity
In January, the average relative humidity is 77%.Rainfall
In Mountainville, during January, the rain falls for 8.8 days and regularly aggregates up to 2.32" (59mm) of precipitation. Throughout the year, there are 162.3 rainfall days, and 32.83" (834mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Mountainville, during January, snow falls for 8 days and regularly aggregates up to 3.03" (77mm) of snow. In Mountainville, during the entire year, snow falls for 27.8 days and aggregates up to 15.35" (390mm) of snow.Daylight
In January, the average length of the day is 9h and 39min.On the first day of the month, sunrise is at 7:23 am and sunset at 4:42 pm. On the last day of January, sunrise is at 7:10 am and sunset at 5:15 pm EST.
Sunshine
In Mountainville, the average sunshine in January 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 of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.Note: A maximum high daily UV index of 2 during January translates into the following directions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
How cold is January?
What is the average humidity in January?
How many days does it rain in January?
How many days does it snow in January in Mountainville?
What is the average length of the day in January?
What time are sunrise and sunset in January?
How many hours of sunshine does Mountainville have in January?
When is the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Mountainville, NJ
- Average high temperature in January: 35.1°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in January: 22.3°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure in January
Mountainville, 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
Mountainville, 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 (5mph).
Average humidity in January
Mountainville, 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 (75%).
Average rainfall in January
Mountainville, NJ
- Average rainfall in January: 2.32"
The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in January
Mountainville, NJ
- Average rainfall days in January: 8.8 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in January
Mountainville, NJ
- Average snowfall in January: 3.03"
The month with the highest snowfall is March (4.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Mountainville, NJ
- Average snowfall days in January: 8 days
The months with the highest number of snowfall days are January and February (8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Mountainville, NJ
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
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 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in January
Mountainville, NJ
- Average sunshine days in January: 16.8 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (11 days).
Average UV index in January
Mountainville, 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
Mountainville, NJ
- Average cloud cover in January: 46
The months with the most cloud cover are February and December (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in January
Mountainville, NJ
- Average visibility in January: 6mi
The months with the highest visibility are January, March, April, June, July, November and December (6mi).
The months with the lowest visibility are February, May, August, September and October (5mi).
Mountainville, New Jersey, USA
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