Cornwall Climate by Month
The climate in Cornwall is marked by big temperature swings throughout the year.
Temperatures range from warm during the warmest months
to very cold in the cooler months.
It also has a notably wet climate with much precipitation.
Now, let’s explore all the climate details to give you a full picture.
Average day and night temperature
In Cornwall, temperatures differ significantly between summer and winter months. Average daytime temperatures range from a comfortable 27°C in July, the warmest time of the year, to a very cold -4°C during cooler months like January. At night, temperatures typically average around -12°C during these months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Cornwall experiences significant rain/snowfall throughout the year, averaging 1006 mm of precipitation annually. While rainfall varies throughout the year, each season offers its own charm. October brings wetter days averaging 115 mm of precipitation, spread over 16 rainy days. In contrast, March experiences a drier climate, with about 57 mm of snow/rainfall spread across 13 snowy/rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
The best time of year to visit Cornwall in Canada
During the months of May, June, August and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The coldest season / winter is in the following months: January, February and December.
July has an average maximum temperature of 27°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of -4°C.
October tops the wettest month list with 115 mm of rainfall.
March is the driest month with 57 mm of precipitation.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
