When to go · Cornwall, Ontario
Cornwall, Ontario in May
Good month. Outside the best window (Jun–Sep). Across Canada: Victoria Day weekend opens the season; Rockies lakes still frozen at altitude.
Key facts
- Verdict
- Good
- Temperature
- 20°C68°F / 9°C48°F
- average high / low
- Rain days
- 13
- Crowds
- Medium
- Canada overall
- Prices
- Medium
- Canada overall
Verdict
GoodCanada month rating
Outside the best window (Jun–Sep). Across Canada: Victoria Day weekend opens the season; Rockies lakes still frozen at altitude.
Weather in May
- Cornwall, OntarioHighs around 19.8 °C, lows around 8.8 °C, rain on about 13 daysHighs around 68 °F, lows around 48 °F, rain on about 13 days
Crowds and prices
- Crowds · Canada overall
- Medium
- Prices · Canada overall
- Medium
Canada overall: Victoria Day weekend opens the season; Rockies lakes still frozen at altitude.
What to pack
- A warm layer for the evenings
- A rain jacket or umbrella and shoes that dry fast