United StatesThe weather in January in Cornwall
It's cold in January in Cornwall with an average temperature of 2°C. Temperatures this month range from a low of -3°C to a high of 6°C. At night, you can expect temperatures between -12°C and -3°C.
Looking for sun? January isn’t a good month to be in Cornwall. There’s too much chance of rain this month.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in January for Cornwall, Connecticut. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 19°C in 2020, Cornwall reached the highest temperature in January over the past 10 years. The lowest daytime temperature in this month was -14°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of -23°C to a highest value of 8°C.
Precipitation and snowfall
In January, there is an average of 141 mm of precipitation, spread over 14 days. Of the total precipitation, about 43 cm falls as snow in January. The wind speed is around 4 Bft, mostly coming from the Southwest.
Daily weather in January for Cornwall
Click on any day in January to get detailed info about the usual weather on that day in Cornwall. Check out the historical temperatures and precipitation over the past 10 years on this day.
January weather comparison
| Cornwall | New York | |
|---|---|---|
| Average temperature | 2°C | 5°C |
| Max. temperature | 6°C | 11°C |
| Min. temperature | -12°C | -5°C |
| Total precipitation | 141 mm | 97 mm |
| Rainy days | 14 days | 12 days |
| Total snowfall | 43 cm | 16 cm |
| Snowy days | 16 days | 8 days |
Start of January
The month of January starts in Cornwall with really cold temps, averaging around 3°C during the day and nights dipping to about -6°C.
Mid January
By mid-January, daytime temps stay steady at around 3°C, with nights around -6°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of January
By the end of January, the average daytime temperature in Cornwall is around 2°C, while nighttime temps are about -7°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Check out the climate of Cornwall for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in January in Cornwall, Connecticut. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in January in Cornwall
Temperature in January in Cornwall over the years
Precipitation charts
These charts show the average amount of precipitation in January in Cornwall, Connecticut. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in January in Cornwall
Total precipitation in January in Cornwall over the years
Daily Snowfall in January in Cornwall
Snowfall in January in Cornwall per year
Daily UV index in January in Cornwall
This chart shows the average daily UV index in January in Cornwall, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in January in Cornwall
Have you been to Cornwall in January?
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Average weather in Cornwall by month
Click on a month below to see detailed weather info for Cornwall. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.