Weather in Ontario in October
Ontario, United States averages a high of 26.7°C (80.1°F) and low of 13.9°C (57°F) in October, with 3 rain days and 10.4 hours of daily sunshine. Travel score: 96.9/100 (Excellent). The best time to visit Ontario is July.
High
27°C80°F
Low
14°C57°F
🌧️
3
rain days
☀️
10.4
hrs/day sunshine
💧
54%
humidity
97— Excellent
October in Ontario is warm and dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in Ontario?
How much does it rain in Ontario in October?
Ontario receives an average of 18.1mm of rainfall across 3 rainy days in October. The annual total is 403.1mm.
What should I pack for Ontario in October?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 27°C
🧴
Sunscreen SPF 30+
10 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Evening jacket or cardigan
Temperature drops 13°C from day to night
🎉Visiting United States in October?
Don't miss any public holidays — check before you book!
Compare Ontario
Popular comparisons:
How can I plan my trip to Ontario?
What other cities are near Ontario?
What are other popular cities in United States?
What is the weather like in other months in Ontario?
Data based on 1994–2024 averages · Last updated: 2024-12-31