When to go · Cornwall, Ontario
Cornwall, Ontario in October
Good month. Outside the best window (Jun–Sep). Across Canada: Foliage in Ontario, Québec and the Maritimes early in the month; mountain roads get snow.
Key facts
- Verdict
- Good
- Temperature
- 14°C (57°F)57°F (14°C) / 6°C (42°F)42°F (6°C)
- average high / low
- Rain days
- 13
- Crowds
- Medium
- Canada overall
- Prices
- Medium
- Canada overall
Verdict
Outside the best window (Jun–Sep). Across Canada: Foliage in Ontario, Québec and the Maritimes early in the month; mountain roads get snow.
Is another month better than October?
October is rated good. These months rate higher:
Weather in October
- Cornwall, OntarioHighs around 14.1 °C (57 °F), lows around 5.7 °C (42 °F), rain on about 13 daysHighs around 57 °F (14.1 °C), lows around 42 °F (5.7 °C), rain on about 13 days
Crowds and prices
- Crowds · Canada overall
- Medium
- Prices · Canada overall
- Medium
Canada overall: Foliage in Ontario, Québec and the Maritimes early in the month; mountain roads get snow.
Compare two months
Weather, crowds and prices for any two months in Cornwall, Ontario, side by side.
Verdict
Oct: Good
Jun: Great (better)
Daytime high
Oct: 14.1 °C (57 °F)57 °F (14.1 °C)
Jun: 24.6 °C (76 °F)76 °F (24.6 °C)
Night low
Oct: 5.7 °C (42 °F)42 °F (5.7 °C)
Jun: 14.1 °C (57 °F)57 °F (14.1 °C)
Rain days
Oct: 13
Jun: 13
Crowds
Oct: Medium
Jun: Medium
Prices
Oct: Medium
Jun: Medium
Festivals listed
Oct: 0
Jun: 1
October: Outside the best window (Jun–Sep). Across Canada: Foliage in Ontario, Québec and the Maritimes early in the month; mountain roads get snow.
June: Inside Cornwall, Ontario's best window: Jun–Sep.
Cornwall, Ontario: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm layer for the evenings
- A rain jacket or umbrella and shoes that dry fast