Dorset (ON) Temperature by Month

Dorset in Ontario, Canada sees significant seasonal temperature differences, with daytime highs between -5°C (23°F) in January and 24°C (75°F) in July, averaging 11°C (52°F) annually. Explore the full monthly breakdown below.

Visitors to Dorset will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures range from 14°C (57°F) in July to -14°C (7°F) in January.

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

Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM.

The chart below shows the average temperature throughout the year:

Dorset'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:

Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short 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 Dorset this rarely lasts long on the ground.

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