Mississauga Weather in December
Mississauga in December sees low daytime temperatures of 3°C (37°F) and nighttime lows of -3°C (27°F). Rainfall is fairly high this month at around 76 mm (3 in), so pack a rain jacket to stay dry.
Rainfall in Mississauga in December
You can expect snow/rain on roughly 12 days based on historical data, averaging 76 mm (3 in) for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Mississauga in December
Expect highs of 3°C (37°F) in Mississauga in December, with nights dropping to around -3°C (27°F). The winter season is characteristic of December. Time outdoors is usually more comfortable with proper winter clothing and protection from wind. Nights are well below freezing at -3°C (27°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation. Prepare for a very cold month by layering your clothing. It's always better to be prepared for the cold than to face it unprotected.
Sunshine in Mississauga in December
The area sees fewer sunny days, with a projection of about 88 hours of sunshine. This reduced sunlight makes it ideal for those who prefer overcast conditions over bright sunny days.If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Mississauga. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Canada, check out our Mississauga's climate page.
Mississauga Temperature in December
Min Temperature
-3°C (27°F)
Max Temperature
3°C (37°F)
Chance of Rain
41%
Precipitation
76 mm (3 in)
Rainy days
12 days
Humidity
72%
Sunshine
88 hours
Percentage Sunshine
31%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Mississauga typically drop from around 4°C (39°F) at the start of December to approximately 1°C (34°F) by the end. Nights are very cold, with lows typically ranging from -6°C (21°F) to -1°C (30°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Mississauga in December
Browse day-by-day weather records for Mississauga spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mississauga historical weather extremes in December
Our historical data for Mississauga spans 1976 to 2025, revealing these weather extremes.
- The hottest December day on record in Mississauga reached 19°C (66°F) (December 3, 1982).
Best Places in Canada in December
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in December →
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What to Wear in Mississauga in December
Dress warmly and in layers for your trip to Mississauga in December. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Wet weather is likely, so pack waterproof gear for multiple rainy days. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.What To Do in Mississauga in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Canada, check out our Mississauga's climate page.
Temperature Rainfall Sunshine Humidity
See the full Mississauga climate overview or explore weather in Canada.
