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 is the coldest month, with the temperature often reaching an average high of 37.9°F (3.3°C) and an average low of 26.1°F (-3.3°C).Humidity
In January, the average relative humidity is 74%.Rainfall
The month with the least rainfall is January, when the rain falls for 6.8 days and typically collects 0.51" (13mm) of precipitation.Snowfall
Months with snowfall in Sewell are January through April, November and December. In Sewell, during January, snow falls for 3.5 days and regularly aggregates up to 0.43" (11mm) of snow. In Sewell, during the entire year, snow falls for 10.9 days and aggregates up to 1.65" (42mm) of snow.Daylight
The average length of the day in January in Sewell is 9h and 44min.On the first day of January, sunrise is at 7:21 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 5:18 pm EST.
Sunshine
In Sewell, the average sunshine in January is 5.2h.UV index
January, February, 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 minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index, 2 in January, converts into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
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 in Sewell?
What is the driest month?
How many days does it rain in January?
How much does it snow in January?
What is the average length of the day in January?
When is the sunrise / sunset in January?
How long on average sun shines in January?
When is the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Sewell, NJ
- Average high temperature in January: 37.9°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in January: 26.1°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in January
Sewell, NJ
- Average pressure in January: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in January
Sewell, NJ
- Average wind speed in January: 8.3mph
The windiest months (with the highest average wind speed) are March and April (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in January
Sewell, NJ
- Average humidity in January: 74%
The months with the highest relative humidity are October and December (77%).
The month with the lowest relative humidity is April (71%).
Average rainfall in January
Sewell, NJ
- Average rainfall in January: 0.51"
The wettest month (with the highest rainfall) is August (1.1").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in January
Sewell, NJ
- Average rainfall days in January: 6.8 days
The month with the highest number of rainy days is July (13.2 days).
The month with the least rainy days is November (6.3 days).
Average snowfall in January
Sewell, NJ
- Average snowfall in January: 0.43"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Sewell, NJ
- Average snowfall days in January: 3.5 days
The month with the highest number of snowfall days is January (3.5 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
Sewell, NJ
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in January
Sewell, NJ
- Average sunshine days in January: 21.8 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is July (14.7 days).
Average UV index in January
Sewell, NJ
- Average UV index in January: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Sewell, NJ
- Average cloud cover in January: 44
The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in January
Sewell, NJ
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Sewell, New Jersey, USA
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