-1 to 27°C
temperature
2608 hours
sunshine per day
720 mm
rain
173 days
dry
153 days
rain
39 days
snow

Climate of Cornwall

Cornwall has a continental climate. It is warm in the summer and cold in the winter. The average annual temperature for Cornwall is 14° degrees and there is about 721 mm of rain in a year. It is dry for 169 days a year with an average humidity of 79% and an UV-index of 3.

Climate averages for the whole year

  • Day: the average daily temperature during the day is between -1°C and 27°C
  • Night:the average nighttime temperature is between -8°C and 16°C
  • Rain: it rains 153 days and there is a total of approximately 720 mm rainfall
  • Snow: it snows an average of 39 days per year
  • Sun hours: throughout the year there are 2608 sun hours
Maximum temperature: between -1°C and 27°C
Warmest month: 27°C in July
Coldest month: -1°C in January
Night temperature: between -8°C and 16°C
Dry days: 173 days
Days with rain: 153 days
Days with snow: 39 days
Total rain sum: 720 mm
Hours of sunshine: 2608 hours

Temperature graph

This graph shows the average maximum temperature (red) and minimum temperature (blue) for Cornwall.

Precipitation graph

This graph shows the average amount of rainfall per month for Cornwall.

Climate table of Cornwall

In this climate table you can see at a glance what the average weather per month is for Cornwall. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for Cornwall might be like in a given month.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Day temp. (°C) -1 1 6 13 20 24 27 26 22 15 9 3
Night temp. (°C) -8 -7 -3 3 9 13 16 15 12 7 1 -3
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Precipitation (mm) 53 54 56 49 57 61 69 64 56 62 67 72
Days with rain 8 8 12 14 16 17 17 15 13 12 11 10
Days with snow 9 10 8 1 - - - - - 1 3 7
Dry days 14 10 11 15 15 13 14 16 17 18 16 14
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sun hours per day 5 4 6 9 9 10 10 10 9 6 5 4
Wind force (Bft) 3 3 3 3 2 2 2 2 2 2 3 3
UV-index 2 2 2 3 5 6 5 5 4 3 2 2

Best time to visit Cornwall

The best time to visit Cornwall in the state of Connecticut is from May through September. In this period you have a warm temperature and little precipitation. The highest average temperature in Cornwall is 27°C in July and the lowest is -1°C in January.

Climate of Cornwall by month

What is the average climate in a given month for Cornwall? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.

Cornwall weather experiences

Have you been to in Cornwall?

Leave your Cornwall weather experience for a chance to win $150!

Your email will not appear with the review and will not be passed on to third parties.
Seen a mistake?

Email us, we are grateful to you.