• Early AM

    May 21

    Lo 16°

    Partly to mostly cloudy

    Dust & Dander Weather
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      350 - High
    more
  • Today

    May 21

    27°Lo 16°

    Rain and a thunderstorm

    Extreme indoor dust & dander levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      350 - High
  • Wed

    May 22

    22°Lo 14°

    A couple of thunderstorms

    Extreme indoor dust & dander levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      350 - High
    more
  • Thu

    May 23

    19°Lo 5°

    Not as warm with a t-storm

    Extreme indoor dust & dander levels
    • Precip
      55%
    • Wind
      Speed
      16 k/h
    • Cloud
      Cover
      76%
    more
  • Fri

    May 24

    15°Lo 5°

    Breezy with periods of sun

    Extreme indoor dust & dander levels
    • Precip
      0%
    • Wind
      Speed
      19 k/h
    • Cloud
      Cover
      46%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
3am
4am 5am 6am 7am 8am 9am 10am
  3am 4am 5am 6am 7am 8am 9am 10am
Forecast
Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Rain
Rain
Mostly Cloudy
Temp (°C) 17° 16° 16° 16° 16° 18° 19° 21°
RealFeel® 16° 15° 15° 15° 16° 17° 19° 22°
Humidity 89% 93% 94% 93% 92% 90% 84% 78%
   
  3am 4am 5am 6am 7am 8am 9am 10am
Rain
 
47%
 
40%
 
34%
 
34%
 
40%
 
56%
 
56%
 
48%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  3am 4am 5am 6am 7am 8am 9am 10am
Wind (km/h) 5 NW 5 NNW 5 NE 6 SSE 5 SSE 8 SSW 10 SSW 10 SSW
UV Index 0 0 0 0 0 1 2 3
Cloud Cover 93% 84% 79% 76% 76% 85% 84% 83%
Dew Point 15° 15° 14° 15° 15° 16° 16° 17°
Middle Grid line 25 C Middle Grid line 20 C Middle Grid line 15 C

Temperature History - May 21

more Historical Weather Data >
  Today Normal Record 5/21/2012
High 27° 20° 32° (1941) 26°
Low 16° -1° (1967) 15°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:48 AM with 14:55 of sunlight, then sets at 8:43 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:48 PM with 11:07 of moolight, then sets at 3:55 AM

Top Story

Mississauga Weather Report

The Summer Outlook for Canada

May 20, 2013; 2:44 PM ET

The Accuweather.com summer forecast for Canada. more >