Markham Weather in October
What's the weather like in Markham (Ontario) in October 2025?
The climate in Markham during October can be summarized as cool and reasonably dry.
October is in the fall / autumn in Markham and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 13°C (56°F), whilst at night 4°C (39°F) is normal.
| Daytime temperature | 13.2°C 55.8°F |
|---|---|
| Nightly temperature | 3.6°C 38.5°F |
| Average temperature | 8.4°C 47.1°F |
| Daily sunshine | 5 hrs |
| Avg rainfall | 68 mm 2.7 ins |
| Rainy days | 10 days |
| Sea temperature | 14.1°C 57.3°F |
| Humidity | 78% |
| Windspeed | 14.4kph 9 mph |
On average October is the 5th driest month of the year in Markham with around 68mm 2.7 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.
On the flip side this corresponds to an average of 5 hours of sunshine per day.
October temperatures in Markham
October rainfall
October hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Markham in October 2025.
Other monthly averages
Best places to visit in October
Markham weather stats
| Hottest month: | July | 25.9°C 78.6°F |
|---|---|---|
| Driest month: | February | 49mm 1.9ins |
| Sunniest month: | July | 9.8hrs |
| Coldest month: | January | -3.7°C 25.3°F |
| Wettest month: | August | 89mm 3.5ins |
© Google
Locations nearby
Top Canada locations
- Calgary
- Edmonton
- Halifax
- Montréal
- Niagara Falls
- Ottawa
- Québec
- St. John's
- Toronto
- Vancouver
- Whistler
- Winnipeg