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 sea temperature 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
The month of January, characterized by an average high of 35.8°F (2.1°C) and a low of 26.1°F (-3.3°C), is recognized as the coldest.Humidity
The average relative humidity in January is 74%.Rainfall
January and February are months with the least rain in Cos Cob when the rain falls for 7.9 days and typically aggregates up to 2.4" (61mm) of rain.Snowfall
Months with snowfall are January through April, November and December. In Cos Cob, in January, during 7.2 snowfall days, 1.97" (50mm) of snow is typically accumulated. In Cos Cob, during the entire year, snow falls for 25.5 days and aggregates up to 8.78" (223mm) of snow.Ocean temperature
In January, the average ocean temperature in Cos Cob is 41.7°F (5.4°C).Note: Swimming in 41.7°F (5.4°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.
Daylight
In January, the average length of the day is 9h and 37min.On the first day of January, sunrise is at 7:19 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 5:09 pm EST.
Sunshine
In Cos Cob, the average sunshine in January is 5h.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 unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index, 2 during January, leads to the following recommendations:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Caution! The reflection of snow 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 time of the year is the coldest in Cos Cob?
How cold is January in Cos Cob?
What is the average humidity in January in Cos Cob?
What is the driest month in Cos Cob?
How much does it rain in Cos Cob in January?
How many days does it snow in January in Cos Cob?
What is the ocean temperature in January in Cos Cob?
How many hours of daylight does Cos Cob have in January?
What time are sunrise and sunset in January in Cos Cob?
How long on average sun shines in January in Cos Cob?
What are the months with the lowest UV index in Cos Cob?
What is the UV index reading in January in Cos Cob?
Average temperature in January
Cos Cob, CT
- Average high temperature in January: 35.8°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (35.8°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
Cos Cob, CT
- Average pressure in January: 30.05"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
Cos Cob, CT
- Average wind speed in January: 9.9mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in January
Cos Cob, CT
- Average humidity in January: 74%
The months with the highest relative humidity are February, May and December (75%).
The month with the lowest relative humidity is August (71%).
Average rainfall in January
Cos Cob, CT
- Average rainfall in January: 2.4"
The wettest month (with the highest rainfall) is July (4.13").
The driest months (with the least rainfall) are January and February (2.4").
Average rainfall days in January
Cos Cob, CT
- Average rainfall days in January: 7.9 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in January
Cos Cob, CT
- Average snowfall in January: 1.97"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Cos Cob, CT
- Average snowfall days in January: 7.2 days
The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in January
Cos Cob, CT
- Average sea temperature in January: 41.6°F
The best month for swimming (with the highest average sea temperature) is August (73.1°F).
The coldest month (with the lowest average sea temperature) is February (39.5°F).
Average daylight in January /
Average sunshine in January
Cos Cob, 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 0min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in January
Cos Cob, CT
- Average sunshine days in January: 17.6 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in January
Cos Cob, 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
Cos Cob, CT
- Average cloud cover in January: 45
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in January
Cos Cob, 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).
Cos Cob, Connecticut, USA
Weather forecast for your location
2. Allow the app to use your location