Weathermondo.com
United StatesThe climate of Cornwall
The current climate in Cornwall features temperatures ranging from a high of 29°C to a low of 2°C throughout the year. The average yearly temperature is around 16°C. At night, temperatures in the colder months average around -7°C and in the warmer months around 18°C.
Average temperatures and precipitation
This chart shows the average monthly maximum and minimum temperatures (in degrees Celsius) and average monthly rainfall (in millimeters) for Cornwall, Connecticut.
Temperature records
The highest temperature recorded in Cornwall in recent years was 36°C in July 2019. The lowest daytime temperature recorded was -14°C in January 2019.
Precipitation and snowfall
On average, Cornwall gets 1247 mm of precipitation each year. Of this, about 132 cm is snowfall. For comparison, New York gets 1142 mm of precipitation each year.
Best time to visit Cornwall?
The best time to visit Cornwall for sunny weather is May through August. During this period, you'll have nice temperatures and not too much rain, making it a great time to visit Cornwall. In the other months of the year, there's too much rain or the temperature isn't ideal for a visit if you want sunny and pleasant weather.
Climate Table of Cornwall
The climate table of Cornwall shows the average temperatures, rainfall, snow, and UV index per month. The table provides an overview of the average day and night temperatures in degrees Celsius, the total amount of rainfall in millimeters, the total snowfall in centimeters, and the UV index for each month. Rainfall is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp. max (°C) | 2 | 4 | 8 | 15 | 21 | 26 | 29 | 28 | 24 | 18 | 11 | 6 |
| Temp. min (°C) | -7 | -5 | -1 | 5 | 10 | 15 | 19 | 18 | 14 | 8 | 2 | -2 |
| Precipitation |  |
|
|
|
|
|
|
|
|
|
|
|
| Precipitation (mm) | 141 | 97 | 58 | 124 | 104 | 56 | 87 | 89 | 128 | 155 | 62 | 146 |
| Snow (cm) | 43 | 43 | 18 | 2,8 | 0 | 0 | 0 | 0 | 0 | 1,0 | 4,3 | 20 |
| UV Index | 3 | 2 | 4 | 6 | 7 | 8 | 7 | 7 | 6 | 3 | 3 | 1 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
Temperature charts
These charts display the average temperatures in Cornwall, Connecticut. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Average Temperature per Month in Cornwall
Yearly Temperature in Cornwall
Precipitation charts
These charts show the average amount of precipitation 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.
Average Precipitation per Month in Cornwall
Total Yearly Precipitation in Cornwall
Average Snowfall per Month in Cornwall
Total Yearly Snowfall in Cornwall
UV index chart
This chart shows the average UV index per month in Cornwall, Connecticut. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Average UV Index per Month in Cornwall
Weather experiences in Cornwall
Have you been to Cornwall?
Share your weather experiences in Cornwall.
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.