Temperatures in October
It's cool to moderate in October in Ontario with an average temperature of 17°C. Temperatures this month range from a low of 12°C to a high of 22°C. At night, you can expect temperatures between 4°C and 12°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Ontario in October. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of October
The month of October starts in Ontario with mild temperatures, averaging around 20°C during the day and nights close to 11°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-October
By mid-October, the average daytime temperature drops to around 17°C, with nights close to 9°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of October
By the end of October, the average daytime temperature in Ontario will be around 14°C, with nights close to 7°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
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Precipitation in October
In October, there is an average of 92 mm of precipitation, spread over 12 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
The average precipitation chance is 40% per day this month. The weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in October for Ontario. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Ontario in October |
London | ||
|---|---|---|---|
 Average Temperature |
17°C | 15°C | |
 High Temp |
22°C | 17°C | |
| Low Temp |
12°C | 13°C | |
 Total Precipitation |
92 mm | 115 mm | |
| Rainy Days |
12 days | 14 days | |
September
UV index
The UV index is a maximum of 3 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is October a good time to visit Ontario?
Looking for sun and warm weather? Then October isn’t the best time to be in Ontario. The temperature is too low this month for a warm stay.
Temperature records for Ontario in October
With 31°C, Ontario hit the highest temperature in the last 10 years in October 2019. The lowest daytime temperature in this month was 5°C in 2016. The extreme night temperatures ranged from a low of -2°C to a high of 23°C.
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Daily Temperature in October in Ontario
This chart shows the average daily temperatures, both day and night, for each day in October in Ontario, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in October in Ontario
The chart below shows the average daily precipitation in October for Ontario, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for October, you can expect around 12 days of rain in Ontario.
Daily UV Index in October in Ontario
This chart shows the average daily UV index in October in Ontario, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in October in Ontario Over the Years
This chart shows the average temperature in October in Ontario, measured in degrees Celsius, over the past years.
Total Precipitation in October in Ontario Over the Years
This chart shows the average precipitation in October in Ontario, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in October for Ontario
Click on a specific day in October for detailed info on the typical weather on that day in Ontario. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in October in Ontario
Have you been to Ontario in October?
Share your weather experience in October in Ontario.
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.
