• Tonight

    Sep 18

    Lo 1°

    Mainly clear; fog late

    Construction Weather
    • Precip
      1%
    • Hours of Precip
      0
    • Hi
      RealFeel
      14°
  • Fri

    Sep 19

    13°Lo 7°

    Fog in the morning; sunshine

    Very Good for outdoor DIY projects
    • Precip
      0%
    • Hours of Precip
      0
    • Hi
      RealFeel
      15°
    more
  • Sat

    Sep 20

    20°Lo 16°

    A few afternoon showers

    Good for outdoor DIY projects
    • Precip
      60%
    • Hours of Precip
      1
    • Hi
      RealFeel
      17°
    more
  • Sun

    Sep 21

    21°Lo 9°

    Mostly cloudy, showers; warm

    Poor for outdoor DIY projects
    • Precip
      78%
    • Hours of Precip
      4.5
    • Hi
      RealFeel
      21°
    more
  • Mon

    Sep 22

    14°Lo 7°

    Cooler

    Very Good for outdoor DIY projects
    • Precip
      30%
    • Hours of Precip
      0
    • Hi
      RealFeel
      14°
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
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10am 11am 12pm 1pm 2pm 3pm 4pm
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Mostly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Sunny
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Temp (°C) 10° 11° 11° 12° 12° 12° 12°
RealFeel® 12° 14° 14° 11° 12° 11°
Humidity 66% 54% 50% 43% 40% 47% 43% 47%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
15%
 
10%
 
0%
 
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0%
 
0%
 
0%
 
0%
Snow
 
0%
 
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Ice
 
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  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (km/h) 21 N 16 N 10 N 8 NE 11 WNW 14 NNW 11 NNW 11 WNW
UV Index 1 2 3 4 4 2 2 1
Cloud Cover 84% 65% 58% 50% 43% 75% 75% 75%
Dew Point -1° -1°
Middle Grid line 15 C Middle Grid line 10 C Middle Grid line 5 C

Temperature History - Sep 18

more Historical Weather Data >
  Today Normal Record 9/18/2013
High 12° 19° 30° (1942) 21°
Low (1943)

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:37 AM with 12:24 of sunlight, then sets at 7:01 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:15 AM with 14:45 of moolight, then sets at 4:00 PM

Top Story

Saint-Laurent Weather Report

Cold Snap, Widespread Frost Looms for Northeast

September 18, 2014; 9:00 PM ET

The chilliest air of the season so far will settle over much of the Northeast into Friday and will bring frost to a large area. more >