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When to go · Cornwall, Ontario

Cornwall, Ontario, month by month

The best months for Cornwall, Ontario: Jun, Jul, Aug, Sep. Months to avoid: Jan, Feb, Nov.

Month by month

  1. JanuaryAvoidListed as a month to avoid: Jan–Feb (cold, snow), Nov (grey and wet).-3.8 °C / -11.8 °C, 14 rain daysCrowds: Low
  2. FebruaryAvoidListed as a month to avoid: Jan–Feb (cold, snow), Nov (grey and wet).-2.1 °C / -10.6 °C, 12 rain daysCrowds: Low
  3. MarchMixedOutside the best window (Jun–Sep). Across Canada: Late ski season; sugar shacks in Québec open for maple season.3.5 °C / -5.3 °C, 12 rain daysCrowds: Low
  4. AprilMixedOutside the best window (Jun–Sep). Across Canada: Thaw and mud; Rockies trails still snowy; Vancouver cherry blossoms.11.8 °C / 2 °C, 12 rain daysCrowds: Low
  5. MayGoodOutside the best window (Jun–Sep). Across Canada: Victoria Day weekend opens the season; Rockies lakes still frozen at altitude.19.8 °C / 8.8 °C, 13 rain daysCrowds: Medium
  6. JuneGreatInside Cornwall, Ontario's best window: Jun–Sep.24.6 °C / 14.1 °C, 13 rain daysCrowds: Medium · 1 festival or holiday
  7. JulyGreatInside Cornwall, Ontario's best window: Jun–Sep.27.3 °C / 17 °C, 12 rain daysCrowds: High · 1 festival or holiday
  8. AugustGreatInside Cornwall, Ontario's best window: Jun–Sep.26.3 °C / 16.2 °C, 11 rain daysCrowds: High
  9. SeptemberGreatInside Cornwall, Ontario's best window: Jun–Sep.22 °C / 11.8 °C, 12 rain daysCrowds: Medium
  10. OctoberGoodOutside the best window (Jun–Sep). Across Canada: Foliage in Ontario, Québec and the Maritimes early in the month; mountain roads get snow.14.1 °C / 5.7 °C, 13 rain daysCrowds: Medium
  11. NovemberAvoidListed as a month to avoid: Jan–Feb (cold, snow), Nov (grey and wet).6.9 °C / -0.3 °C, 14 rain daysCrowds: Low
  12. DecemberMixedOutside the best window (Jun–Sep). Across Canada: Christmas markets and ski openings; winter tyres required on many BC highways.0 °C / -6.7 °C, 15 rain daysCrowds: Medium · 1 festival or holiday