• Tonight

    Sep 18

    Lo 1°

    Mainly clear; fog late

    Dust & Dander Weather
    • Precip
      1%
    • Wind
      Speed
      10 k/h
    • Cloud
      Cover
      66%
  • Fri

    Sep 19

    13°Lo 7°

    Fog in the a.m.; lots of sun

    High indoor dust & dander levels
    • Precip
      0%
    • Wind
      Speed
      6 k/h
    • Cloud
      Cover
      13%
    more
  • Sat

    Sep 20

    20°Lo 14°

    A few afternoon showers

    Moderate indoor dust & dander levels
    • Precip
      60%
    • Wind
      Speed
      21 k/h
    • Cloud
      Cover
      60%
    more
  • Sun

    Sep 21

    20°Lo 7°

    Rather cloudy with showers

    Low indoor dust & dander levels
    • Precip
      78%
    • Wind
      Speed
      11 k/h
    • Cloud
      Cover
      87%
    more
  • Mon

    Sep 22

    13°Lo 5°

    Cooler

    Low indoor dust & dander levels
    • Precip
      30%
    • Wind
      Speed
      13 k/h
    • Cloud
      Cover
      50%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
3pm
4pm 5pm 6pm 7pm 8pm 9pm 10pm
  3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm
Forecast
Mostly Cloudy
Mostly Cloudy
Partly Cloudy
Partly Sunny
Partly Sunny
Partly Cloudy
Mostly Clear
Mostly Clear
Temp (°C) 12° 13° 12° 12° 11°
RealFeel® 13° 13° 11° 10°
Humidity 47% 45% 47% 47% 48% 49% 51% 51%
   
  3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
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  3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm
Wind (km/h) 8 NNW 10 NNW 10 NNW 8 NNW 8 NNW 6 NNW 6 NNW 6 NNW
UV Index 2 1 1 0 0 0 0 0
Cloud Cover 81% 78% 68% 49% 42% 32% 23% 13%
Dew Point -1° -2° -2°
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 13° 19° 30° (1942) 21°
Low (1943)

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:36 AM with 12:24 of sunlight, then sets at 7:00 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:14 AM with 14:45 of moolight, then sets at 3:59 PM

Top Story

Longueuil Weather Report

Cold Snap, Widespread Frost Looms for Northeast

September 18, 2014; 5:00 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 >