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 40.1°F (4.5°C) and an average low of 31.3°F (-0.4°C).Humidity
In January, the average relative humidity is 74%.Rainfall
The month with the least rainfall is January, when the rain falls for 7 days and typically collects 0.67" (17mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. The month with the most snowfall is January, when snow falls for 4.7 days and typically aggregates up to 0.59" (15mm) of snow.Daylight
In South Dennis, the average length of the day in January is 9h and 47min.On the first day of the month, sunrise is at 7:18 am and sunset at 4:46 pm. On the last day of January, sunrise is at 7:07 am and sunset at 5:18 pm EST.
Sunshine
In South Dennis, the average sunshine in January is 5.4h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 2 in January translates into this advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
Is January cold?
What is the average humidity in January?
What is the driest month?
How much does it rain in January?
What is the snowiest month?
How many days does it snow in January?
How many hours of daylight does South Dennis have in January?
When is the sunrise / sunset in January?
How many hours of sunshine does South Dennis have in January?
What is the month with the lowest UV index in South Dennis?
What is the UV index intensity in January?
Average temperature in January
South Dennis, NJ
- Average high temperature in January: 40.1°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (40.1°F).
- Average low temperature in January: 31.3°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).
Average pressure in January
South Dennis, NJ
- Average pressure in January: 30.08"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in January
South Dennis, NJ
- Average wind speed in January: 11.9mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).
Average humidity in January
South Dennis, NJ
- Average humidity in January: 74%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is November (73%).
Average rainfall in January
South Dennis, NJ
- Average rainfall in January: 0.67"
The wettest month (with the highest rainfall) is August (1.61").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in January
South Dennis, NJ
- Average rainfall days in January: 7 days
The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is January (7 days).
Average snowfall in January
South Dennis, NJ
- Average snowfall in January: 0.59"
The month with the highest snowfall is January (0.59").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
South Dennis, NJ
- Average snowfall days in January: 4.7 days
The month with the highest number of snowfall days is January (4.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
South Dennis, NJ
- Average daylight in January: 9h and 5min
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 30min).
- Average sunshine in January: 5h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in January
South Dennis, NJ
- Average sunshine days in January: 19.6 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is July (13.4 days).
Average UV index in January
South Dennis, 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 and December (UV index 2).
Average cloud cover in January
South Dennis, NJ
- Average cloud cover in January: 42
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in January
South Dennis, 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).
South Dennis, New Jersey, USA
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