January weather forecast
New Haven, CT

Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
°Celsius°Fahrenheit
Share

Contents

The greeny New Haven Green in Connecticut, with the rest of the city and a far away dramatic landscape
The greeny New Haven Green in Connecticut, with the rest of the city and a far away dramatic landscape

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.
[Resources]

Frequently asked questions

What are the coldest months in New Haven?

In New Haven, January is the coldest month, with temperatures averaging a high of 35.1°F (1.7°C) and a low of 25.5°F (-3.6°C).

How cold is it in New Haven in January?

In New Haven, 35.1°F (1.7°C) is the average high-temperature and 25.5°F (-3.6°C) is the average low-temperature during January.

What is the average humidity in January in New Haven?

In January, the average relative humidity is 74%.

How much does it rain in New Haven in January?

In New Haven, in January, it is raining for 9.4 days, with typically 2.4" (61mm) of accumulated precipitation.

How much does it snow in New Haven in January?

In New Haven, during January, snow falls for 6.1 days and regularly aggregates up to 2.13" (54mm) of snow.

What is the water temperature in January in New Haven?

In New Haven, the average seawater temperature in January is 41.4°F (5.2°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

What is the average length of the day in January in New Haven?

The average day length in January in New Haven, Connecticut, is 9h and 36min.

When is the sunrise / sunset in January in New Haven?

In January, on the first day of the month, sunrise is at 7:17 am and sunset at 4:32 pm. On the last day of the month, in New Haven, sunrise is at 7:04 am and sunset at 5:06 pm EST.

How many hours of sunshine does New Haven have in January?

In January, the average sunshine duration in New Haven, Connecticut, is 5.1h.

When is the lowest UV index in New Haven?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in New Haven, Connecticut.

How high is the UV index in January in New Haven?

The average daily maximum UV index in January in New Haven, Connecticut, is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
41.7°F 5.4°C
35.1°F 1.7°C
37.9°F 3.3°C
Average low temperature
32.5°F 0.3°C
25.5°F -3.6°C
26.6°F -3°C
Average pressure
30.06" 764mmHg
30.04" 763mmHg
30.02" 763mmHg
Average wind speed
10.2mph 16.4km/h
10.4mph 16.7km/h
10mph 16.1km/h
Average max. wind speed
10.9mph 17.5km/h
11.1mph 17.9km/h
10.7mph 17.2km/h
Average wind speed gusts
15.6mph 25.1km/h
16mph 25.7km/h
15.7mph 25.3km/h
Average humidity
75%
74%
76%
Average rainfall
3.86" 98mm
2.4" 61mm
2.4" 61mm
Average rainfall days
12.5
9.4
10.1
Average snowfall
1.34" 34mm
2.13" 54mm
2.68" 68mm
Average snowfall days
3.5
6.1
7.3
Average sea temperature
48.7°F 9.3°C
41.2°F 5.1°C
38.5°F 3.6°C
Average daylight
9h 2min
9h 4min
10h 4min
Average sunshine
4h 5min
5h 1min
4h 4min
Average sunshine days
15.4
17
12.8
Average UV index
2
2
2
Average cloud cover
48%
44%
48%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
New Haven, CT

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).

[Resources]

Average pressure in January
New Haven, CT

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).

[Resources]

Average wind speed in January
New Haven, CT

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).

[Resources]

Average humidity in January
New Haven, CT

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%).

[Resources]

Average rainfall in January
New Haven, CT

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").

[Resources]

Average rainfall days in January
New Haven, CT

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).

[Resources]

Average snowfall in January
New Haven, CT

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").

[Resources]

Average snowfall days in January
New Haven, CT

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).

[Resources]

Average sea temperature in January
New Haven, CT

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).

[Resources]

Average daylight in January /
Average sunshine in January
New Haven, CT

Average daylight in January / Average sunshine in January - New Haven, CT
  • 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: 5h and 1min

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).

[Resources]

Average sunshine days in January
New Haven, CT

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).

[Resources]

Average UV index in January
New Haven, CT

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).

[Resources]

Average cloud cover in January
New Haven, CT

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).

[Resources]

Average visibility in January
New Haven, CT

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).

[Resources]

New Haven, Connecticut, USA

Weather forecast for today
Weather forecast for tomorrow
10 days weather forecast
Climate data
1January
2February
3March
4April
5May
6June
7July
8August
9September
10October
11November
12December

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location