Mississauga's climate is considered moderate. The summer months can bring high temperatures sometimes accompanied by high humidity levels. The average temperature in July and August is a nice 70 F; but the temperature can soar to 86 F and above and when paired with the high humidity level can make the temperature appear even warmer.
Winters in Mississauga are cold, with temperatures most often below the freezing mark. The average temperature in January and February is 21 F. Colder periods with temperatures as low as -4 F in these months are not uncommon.
On the same token, brief periods of warmer temperatures also occur on occasion throughout the winter season. The snowfall in Mississauga is relatively low compared with the rest of the province and the rest of Canada.
Current Mississauga Weather
Observed at Toronto Pearson Int'l Airport on 2010-03-11 11:00:00
 | 10°C Mainly Sunny |
| Feels Like | | Wind | ESE 11 km/ |
| Humidity | 47 % | Pressure | 101.5 kPa rising |
| Dew Point | -0.6°C | Visibility | 24.1 km |
| Air Quality | 3 - Low Health Risk | Temperature | 10.3°C |
Short Term Forecast
| | Thursday | Thursday Night | Friday | Saturday | Sunday |
| |  |  |  |  |  |
| | Sunny With Cloudy Periods | Chance Of Showers | Chance Of Showers | Periods Of Rain | Periods Of Rain |
| Low | | 5°C | | 4°C | 5°C |
| High | 14°C | | 13°C | 9°C | 9°C |
Detailed Mississauga Weather Forecast
| Thursday | Sunny with cloudy periods. Wind becoming east 20 km/h this afternoon. High 14. UV index 4 or moderate. Forecast issued 11:00 AM EDT Thursday 11 March 2010 |
| Thursday Night | Becoming cloudy late this evening. 60 percent chance of showers overnight. Wind east 20 km/h becoming light after midnight. Low plus 5. Forecast issued 11:00 AM EDT Thursday 11 March 2010 |
| Friday | Cloudy with sunny periods. 60 percent chance of showers early in the morning. 30 percent chance of showers in the evening. Wind becoming east 30 km/h in the morning. High 13. Forecast issued 11:00 AM EDT Thursday 11 March 2010 |
| Saturday | Periods of rain. Windy. Low plus 4. High 9. Forecast issued 11:00 AM EDT Thursday 11 March 2010 |
| Sunday | Periods of rain. Windy. Low plus 5. High 9. Forecast issued 11:00 AM EDT Thursday 11 March 2010 |
| Monday | Cloudy with 70 percent chance of showers. Low plus 3. High 8. Forecast issued 11:00 AM EDT Thursday 11 March 2010 |
| Tuesday | Sunny. Low zero. High 9. Forecast issued 11:00 AM EDT Thursday 11 March 2010 |
| Wednesday | Sunny. Low minus 2. High 8. Forecast issued 11:00 AM EDT Thursday 11 March 2010 |