Weather in Thunder Bay in December
Thunder Bay, Canada averages a high of -4.3°C (24.3°F) and low of -10.9°C (12.4°F) in December, with 7 rain days and 4.6 hours of daily sunshine. Travel score: 38.2/100 (Poor). The best time to visit Thunder Bay is August.
High
-4°C24°F
Low
-11°C12°F
🌧️
7
rain days
☀️
4.6
hrs/day sunshine
💧
77%
humidity
38— Poor
December in Thunder Bay is freezing and mostly dry — challenging weather conditions.
What are the average temperatures in Thunder Bay?
How much does it rain in Thunder Bay in December?
Thunder Bay receives an average of 40.3mm of rainfall across 7 rainy days in December. The annual total is 654.6mm.
What should I pack for Thunder Bay in December?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Heavy winter coat
Cold weather with highs around -4°C
🩳
Thermal base layers
Stay warm in freezing temperatures
🧤
Warm gloves
Cold nights around -11°C
🧣
Warm scarf
Protect against cold winds
Traveling to Canada in December?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31