Last updated: June 18, 2025
In Mississauga, Canada, the average temperature in December hovers around 0°C (32°F), with a minimum dipping to -21°C (-6°F) and a maximum reaching 15°C (59°F). During this month, expect about 78 mm (3.1 in) of precipitation spread over 12 days, coupled with an average humidity of 87%. Stay prepared for chilly and wet conditions!
In December in Mississauga, the average temperature is 0°C (32°F). The maximum can reach 15°C (59°F), while the minimum can drop as low as -21°C (-6°F). Be prepared for a wide range of temperatures, making it essential to pack layers when traveling during this time.
In Mississauga in December, the precipitation amount is 78 mm (3.1 in), occurring over a span of 12 days.
In Mississauga in December, humidity is 87%. With an average temperature of 0°C (32°F), this humidity feels like a damp chill that clings to your skin, making travel uncomfortable and cold, as each breath brings a heavy moisture that seeps into your clothes.
In Mississauga in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Mississauga, you can visit Hourly UV Index in Mississauga.
UV Risk Categories
Weather in Mississauga varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Mississauga, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (26°F) | 73 mm (2.9 inches) | 91% | low |
| February Weather | -3°C (27°F) | 80 mm (3.2 inches) | 91% | moderate |
| March Weather | 1°C (34°F) | 64 mm (2.5 inches) | 88% | moderate |
| April Weather | 6°C (43°F) | 110 mm (4.3 inches) | 88% | very high |
| May Weather | 12°C (54°F) | 98 mm (3.9 inches) | 82% | very high |
| June Weather | 18°C (65°F) | 88 mm (3.5 inches) | 79% | very high |
| July Weather | 22°C (72°F) | 75 mm (2.9 inches) | 77% | very high |
| August Weather | 22°C (71°F) | 77 mm (3.0 inches) | 72% | very high |
| September Weather | 18°C (64°F) | 63 mm (2.5 inches) | 76% | high |
| October Weather | 12°C (53°F) | 108 mm (4.3 inches) | 83% | moderate |
| November Weather | 4°C (39°F) | 79 mm (3.1 inches) | 88% | moderate |
| December Weather | 0°C (32°F) | 78 mm (3.1 inches) | 87% | low |