What’s the climate like in Ontario?
The current climate of Ontario features average monthly temperatures ranging from highs of 27°C during the day to lows of 0°C. The average yearly temperature is around 14°C. At night, temperatures in the colder months average around -6°C and in the warmer months around 19°C.
The highest temperature recorded in Ontario in recent years was 36°C in June 2022. The lowest daytime temperature recorded was -19°C in February 2015.
On average, Ontario gets 817 mm of precipitation each year. Of this, about 91 cm is snowfall. For comparison, UK gets 701 mm of precipitation each year.
Curious about the climate in other parts of Canada? Check out the weather and climate in places like Vancouver, Toronto, Niagara Falls, or have a look at other destinations in Canada.
Best time to visit Ontario?
The best time to visit Ontario for sunny weather is May through September. During this period, you'll have good temperatures and not too much rain, making it a great time to visit Ontario. 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 Ontario
The climate table of Ontario 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) | 0 | 1 | 5 | 11 | 19 | 24 | 27 | 26 | 23 | 16 | 9 | 4 |
| Temp. min (°C) | -6 | -6 | -1 | 4 | 11 | 16 | 19 | 19 | 15 | 9 | 3 | -1 |
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| Precipitation (mm) | 82 | 73 | 55 | 81 | 57 | 84 | 66 | 63 | 58 | 69 | 55 | 74 |
| Snow (cm) | 26 | 26 | 9,4 | 3,1 | 0 | 0 | 0 | 0 | 0 | 0,1 | 6,8 | 19 |
| UV Index | 2 | 3 | 5 | 6 | 6 | 7 | 8 | 7 | 6 | 3 | 2 | 2 |
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: 14°C
- Highest temperature: 27°C in July
- Lowest temperature: 0°C in January
- Precipitation*: 817 mm per year, averaging 68 mm per month
- Snowfall: 91 cm per year
- Driest months: 55 mm in March, November and 57 mm in May
- Wettest months: 84 mm in June, 82 mm in January and 81 mm in April
*Precipitation is measured as a combination of rain, snow, and hail
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Table of Contents
Average Temperature per Month in Ontario
This graph shows the average maximum temperatures per month in Ontario, Canada. 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 Ontario
This graph shows how much precipitation Ontario, Canada, 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 Ontario
This graph shows how much snow Ontario, Canada, 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 Ontario
This graph shows the average UV index per month in Ontario, Canada. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Yearly Temperature in Ontario
This graph shows the average yearly temperature in Ontario, Canada. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Ontario
This chart shows the total yearly precipitation in Ontario, Canada, 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 Ontario
This chart shows the total yearly snowfall in Ontario, Canada, 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 Ontario
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Average Weather in Ontario by Month
Click on a month below to see detailed weather info for Ontario. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
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