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
In Cornwall, the month of January registers the lowest temperatures, averaging 30.9°F (-0.6°C) at the peak and 18.9°F (-7.3°C) at the lowest.Humidity
In January, the average relative humidity is 79%.Rainfall
The month with the least rainfall is January, when the rain falls for 7.7 days and typically collects 2.17" (55mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Cornwall. In January, it is snowing for 9.3 days. Throughout January, 4.57" (116mm) of snow is accumulated. Throughout the year, there are 40.2 snowfall days, and 20.39" (518mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 33min.On the first day of the month, sunrise is at 7:20 am and sunset at 4:32 pm. On the last day of January, in Cornwall, sunrise is at 7:06 am and sunset at 5:06 pm EST.
Sunshine
In January, the average sunshine in Cornwall, Connecticut, is 4.7h.UV index
The months with the lowest UV index in Cornwall 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 minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In January, the UV index of 2 transforms into the following advice:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Frequently asked questions
What part of the year is the coldest in Cornwall?
How cold is January in Cornwall?
What is the average humidity in January in Cornwall?
What is the driest month in Cornwall?
How much does it rain in Cornwall in January?
How much does it snow in Cornwall in January?
What is the average length of the day in January in Cornwall?
What time are sunrise and sunset in January in Cornwall?
How many hours of sunshine does Cornwall have in January?
What is the month with the lowest UV index in Cornwall?
How high is the UV index in January in Cornwall?
Average temperature in January
Cornwall, CT
- Average high temperature in January: 30.9°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.9°F).
- Average low temperature in January: 18.9°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in January
Cornwall, 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
Cornwall, CT
- Average wind speed in January: 8mph
The windiest months (with the highest average wind speed) are January and March (8mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in January
Cornwall, CT
- Average humidity in January: 79%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (74%).
Average rainfall in January
Cornwall, CT
- Average rainfall in January: 2.17"
The wettest month (with the highest rainfall) is July (3.54").
The driest month (with the least rainfall) is January (2.17").
Average rainfall days in January
Cornwall, CT
- Average rainfall days in January: 7.7 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is January (7.7 days).
Average snowfall in January
Cornwall, CT
- Average snowfall in January: 4.57"
The month with the highest snowfall is February (5.16").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Cornwall, CT
- Average snowfall days in January: 9.3 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Cornwall, CT
- Average daylight in January: 9h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in January
Cornwall, CT
- Average sunshine days in January: 16.8 days
The month with the most sunshine days is January (16.8 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in January
Cornwall, CT
- Average UV index in January: 2
The month with the highest UV index is June (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
Cornwall, CT
- Average cloud cover in January: 49
The month with the most cloud cover is February (Cloud cover 53).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in January
Cornwall, CT
- Average visibility in January: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Cornwall, Connecticut, USA
Weather forecast for your location
2. Allow the app to use your location
