Cornwall (PE) Temperature by Month

Cornwall in Prince Edward Island, Canada sees significant seasonal temperature differences, with daytime highs between -2°C (28°F) in February and 24°C (75°F) in July, averaging 11°C (52°F) annually. Explore the full monthly breakdown below.

Depending on the time of the year, temperatures range from comfortable to very cold in Cornwall. At night, minimum temperatures range from 16°C (61°F) in July to -10°C (14°F) in February.

The chart below illustrates the average maximum day and minimum night temperatures in Cornwall by month:

Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM. July, the city's warmest month, sees 254 hours of sunshine.

The chart below shows the average temperature throughout the year:

Cornwall's average annual maximum temperature is 11°C (52°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Reykjavík, Iceland averages 9°C (48°F) a year, mild summers by Icelandic standards, but cold winters and frequent wind.

Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Cornwall this rarely lasts long on the ground.

For more on Cornwall's weather, including monthly rainfall, sunshine hours, and humidity, visit our Cornwall climate page.