Mississauga weather in December
Long-run climate averages for Mississauga, Ontario in December, plus what the forecast models say for the days ahead.
In December, Mississauga averages 1°C by day and -4°C at night. The wettest month is usually August.
December in Mississauga averages a daytime high of 1°C and an overnight low of -4°C, which reads as cold for this part of the world. It is among the three coldest months of the year here. Overnight temperatures drop below freezing, so expect frost and pack accordingly. Across the whole year Mississauga sees roughly 935 mm of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like - for that, see the live Mississauga forecast with every model compared and how much they currently agree.
Mississauga weather by month
what to expect in Mississauga through the year, 1991-2020 averagesHere is Mississauga's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Mississauga by season.
Bottom line: over the last 30 days the European model has been the most accurate forecast for Mississauga, scoring 94/100 on our CheckWeather Score, ahead of the Env. Canada at 90. See the full CA accuracy scoreboard for exactly how every model is tested.
Common questions
How warm is Mississauga in December?
Is December a good time to visit Mississauga?
Does it rain a lot in Mississauga in December?
Climate averages from ERA5 reanalysis. Model accuracy re-scored over a rolling 30 days. Page updated .