• Today

    May 20

    23°Lo 12°

    Mostly cloudy and warmer

    Very High indoor dust & dander levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      7 - Low
    more
  • Tue

    May 21

    18°Lo 13°

    Mostly cloudy, showers around

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

    May 22

    23°Lo 15°

    Warmer with a bit of rain

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

    May 23

    19°Lo 3°

    Rather cloudy, a little rain

    Extreme indoor dust & dander levels
    • Precip
      55%
    • Wind
      Speed
      11 k/h
    • Cloud
      Cover
      81%
    more
  • Fri

    May 24

    17°Lo 2°

    Chance of a shower

    Extreme indoor dust & dander levels
    • Precip
      30%
    • Wind
      Speed
      19 k/h
    • Cloud
      Cover
      46%
    more
Next Previous
Hi 18° RealFeel® 17° Precipitation 65%

Day

N

E

S

W

  • E 18 km/h
  • Gusts: 27 km/h

Mostly cloudy with a couple of showers

  • Max UV Index: 2 (Low)
  • Thunderstorms: 20%
  • Precipitation: 4 mm
  • Rain: 4 mm
  • Snow: 0 CM
  • Ice: 0 mm
  • Hours of Precipitation: 2 hrs
  • Hours of Rain: 2 hrs
Lo 13° RealFeel® 10° Precipitation 67%

Night

N

E

S

W

  • NE 11 km/h
  • Gusts: 24 km/h

Periods of rain

  • Max UV Index: N/A
  • Thunderstorms: 20%
  • Precipitation: 9 mm
  • Rain: 9 mm
  • Snow: 0 CM
  • Ice: 0 mm
  • Hours of Precipitation: 6 hrs
  • Hours of Rain: 6 hrs

Temperature History - May 21

more Historical Weather Data >
  Today Normal Record 5/21/2012
High 18° 20° 32° (1941) 29°
Low 13° (1967) 15°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:25 AM with 15:08 of sunlight, then sets at 8:33 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:33 PM with 11:02 of moolight, then sets at 3:35 AM

Top Story

Chelsea Weather Report

The Summer Outlook for Canada

May 20, 2013; 5:44 AM ET

The Accuweather.com summer forecast for Canada. more >