January weather forecastNew Haven, CT
January
Weather in January
During January, New Haven experiences cold winter days, typified by the blanket of snow decorating the city with an average of 2.13" (54mm) of snowfall. Marked by a drop in temperature from the relaxing autumn climate, the chill in the air is heightened by the wind, making it slightly cooler yet crisp. As compared to its succeeding month, January is drier, with the humidity and rainfall being less intense. The city undergoes an early sunset, resulting in long and cozy nights. Meanwhile, the frost-kissed mornings and overcast sky offer a hushed tranquility, making it the perfect weather for curling up with a good book.Temperature
In New Haven, the lowest average temperatures are observed in January, with a high of 35.1°F (1.7°C) and a low of 25.5°F (-3.6°C).Humidity
The average relative humidity in January in New Haven is 74%.Rainfall
In New Haven, during January, the rain falls for 9.4 days and regularly aggregates up to 2.4" (61mm) of precipitation. In New Haven, Connecticut, during the entire year, the rain falls for 167.2 days and collects up to 35.71" (907mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In January, it is snowing for 6.1 days. Throughout January, 2.13" (54mm) of snow is accumulated. Throughout the year, in New Haven, there are 23.1 snowfall days, and 9.21" (234mm) of snow is accumulated.Ocean temperature
In New Haven, Connecticut, in January, the average water temperature is 41.4°F (5.2°C).Note: You can swim in 41.4°F (5.2°C) below 50°F (10°C) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. A short span at 55.4°F (13°C) without it is tough.
Daylight
The average length of the day in January is 9h and 36min.On the first day of the month, sunrise is at 7:17 am and sunset at 4:32 pm. On the last day of January, sunrise is at 7:04 am and sunset at 5:06 pm EST.
Sunshine
In January, the average sunshine in New Haven 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 estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 2 during January translates into these guidelines:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. 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
Average temperature in January
New Haven, CT
- Average high temperature in January: 35.1°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in January: 25.5°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 (25.5°F).
Average pressure in January
New Haven, CT
- Average pressure in January: 30.04"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
New Haven, CT
- Average wind speed in January: 10.4mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in January
New Haven, CT
- Average humidity in January: 74%
The months with the highest relative humidity are February, May and June (76%).
The months with the lowest relative humidity are April and November (72%).
Average rainfall in January
New Haven, CT
- Average rainfall in January: 2.4"
The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in January
New Haven, CT
- Average rainfall days in January: 9.4 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in January
New Haven, CT
- Average snowfall in January: 2.13"
The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
New Haven, CT
- Average snowfall days in January: 6.1 days
The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in January
New Haven, CT
- Average sea temperature in January: 41.2°F
The best month for swimming (with the highest average sea temperature) is August (73°F).
The coldest month (with the lowest average sea temperature) is February (38.5°F).
Average daylight in January /
Average sunshine in January
New Haven, CT
- Average daylight in January: 9h and 36min
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 6min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in January
New Haven, CT
- Average sunshine days in January: 17 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is August (11.3 days).
Average UV index in January
New Haven, CT
- 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
New Haven, CT
- Average cloud cover in January: 44
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in January
New Haven, CT
- 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).
