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When to go · Cornwall, Ontario

Cornwall, Ontario in December

Mixed month. Outside the best window (Jun–Sep). Across Canada: Christmas markets and ski openings; winter tyres required on many BC highways.

Key facts

Verdict
Mixed
Temperature
0°C (32°F) / −7°C (20°F)
average high / low
Rain days
15
Crowds
Medium
Canada overall
Prices
High
Canada overall

Verdict

MixedCanada month rating

Outside the best window (Jun–Sep). Across Canada: Christmas markets and ski openings; winter tyres required on many BC highways.

Is another month better than December?

December is rated mixed. These months rate higher:

Weather in December

Long-term averages
  • Cornwall, OntarioHighs around 0 °C (32 °F), lows around -6.7 °C (20 °F), rain on about 15 days

Festivals and holidays

Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.

  • Christmas and Boxing Day big impact

    25–26 Dec · Canada

    Most businesses closed on the 25th; Boxing Day sales.

Crowds and prices

Crowds · Canada overall
Medium
Prices · Canada overall
High

Canada overall: Christmas markets and ski openings; winter tyres required on many BC highways.

High-price month: see what to book ahead.

Compare two months

Weather, crowds and prices for any two months in Cornwall, Ontario, side by side.

  • Verdict

    Dec: Mixed

    Jun: Great (better)

  • Daytime high

    Dec: 0 °C (32 °F)

    Jun: 24.6 °C (76 °F)

  • Night low

    Dec: -6.7 °C (20 °F)

    Jun: 14.1 °C (57 °F)

  • Rain days

    Dec: 15

    Jun: 13 (better)

  • Crowds

    Dec: Medium

    Jun: Medium

  • Prices

    Dec: High

    Jun: Medium

  • Festivals listed

    Dec: 1

    Jun: 1

December: Outside the best window (Jun–Sep). Across Canada: Christmas markets and ski openings; winter tyres required on many BC highways.

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 coat, hat and gloves for mornings and evenings
  • A rain jacket or umbrella and shoes that dry fast

Build the full packing list for your trip →

Across Canada in December →