What’s the climate like in Cornwall?
The current climate of Cornwall features average monthly temperatures ranging from highs of 29°C during the day to lows of 2°C. 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.
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.
On average, Cornwall gets 1247 mm of precipitation each year. Of this, about 132 cm is snowfall. For comparison, London gets 701 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 good 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, precipitation, snow, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation 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.
- Average yearly temperature: 16°C
- Highest temperature: 29°C in July
- Lowest temperature: 2°C in January
- Precipitation*: 1247 mm per year, averaging 104 mm per month
- Snowfall: 132 cm per year
- Driest months: 56 mm in June, 58 mm in March and 62 mm in November
- Wettest months: 155 mm in October, 146 mm in December and 141 mm in January
*Precipitation is measured as a combination of rain, snow, and hail
Table of Contents
Average Temperature per Month in Cornwall
This graph shows the average maximum temperatures per month in Cornwall, Connecticut. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Cornwall
This graph shows how much precipitation Cornwall, Connecticut, gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average Snowfall per Month in Cornwall
This graph shows how much snow Cornwall, Connecticut, gets on average per month. The amount of snowfall is measured in centimetres and the average is calculated based on the recorded snowfall per month from past years.
Average UV Index per Month in Cornwall
This graph 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.
Yearly Temperature in Cornwall
This graph shows the average yearly temperature in Cornwall, Connecticut. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Cornwall
This chart shows the total yearly precipitation in Cornwall, Connecticut, over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
Total Yearly Snowfall in Cornwall
This chart shows the total yearly snowfall in Cornwall, Connecticut, over the past few years. The total yearly snowfall, measured in centimetres, is the sum of all the snow that fell in the twelve months of that year.
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.
