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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the BuzzLayer Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Mississauga’s weather today, based on the live forecast above, shows current conditions shifting through a mix of sun and cloud typical for this season. Temperatures remain near the seasonal average, with lake breezes from Lake Ontario moderating afternoon highs and keeping overnight lows mild.
What’s the weather in Mississauga like this week?
For the next several days, expect a pattern of variable cloudiness with occasional showers moving off the lake. Hourly details in the live forecast above show the chance of rain increasing later today. Looking at the weather in Mississauga tomorrow, a cooler airmass arrives, dropping highs a few degrees. For longer-range planning, the weather in Mississauga 10 days and weather mississauga 14 days outlooks suggest a gradual warming trend by late week. The 21 day weather forecast mississauga and mississauga weather 30 days are best used as general guidance, as confidence decreases beyond a week. Those checking mississauga weather 15 days should refresh with the live forecast above for daily updates.
How does Lake Ontario shape Mississauga’s daily weather?
Mississauga sits along the northwestern shore of Lake Ontario, so onshore winds bring cooler, moisture-laden air in spring and early summer, delaying the warm-up compared to inland spots. In winter, the lake can add cloud and lake-effect flurries, while autumn often sees milder nights due to the lake’s stored heat.
When does Mississauga usually see its first snowfall?
On average, the first measurable snow arrives in late November, though lake-effect flurries can occur earlier. November averages about 10 cm of snow, with January the snowiest month at roughly 30 cm.
How accurate are 14-day or 30-day forecasts for Mississauga?
Forecasts beyond 7–10 days have lower confidence due to changing atmospheric patterns. The mississauga weather 14 days and mississauga weather 30 days outlooks show trends, but always check the live forecast above for the most reliable short-term information.
Does Mississauga get lake-effect rain?
Yes. In spring and fall, cold air passing over warm Lake Ontario can produce narrow bands of rain or drizzle near the shore. This often affects neighbourhoods like Port Credit and Lakeview more than northern parts of the city.
Sources
- Environment and Climate Change Canada – Mississauga
- The Weather Network – Mississauga
- Environment and Climate Change Canada – Home
For more Ontario conditions, see our Canada weather hub or the Toronto Weather page. Stay informed with Weather Warning updates.