• Tonight

    Sep 16

    Lo 5°

    Clear to partly cloudy

    Dust & Dander Weather
    • Precip
      25%
    • Wind
      Speed
      13 k/h
    • Cloud
      Cover
      65%
    more
  • Wed

    Sep 17

    17°Lo 5°

    Some sun, then clouds

    Low indoor dust & dander levels
    • Precip
      25%
    • Wind
      Speed
      6 k/h
    • Cloud
      Cover
      56%
  • Thu

    Sep 18

    12°Lo 1°

    Mostly sunny and cool

    Moderate indoor dust & dander levels
    • Precip
      0%
    • Wind
      Speed
      11 k/h
    • Cloud
      Cover
      23%
    more
  • Fri

    Sep 19

    15°Lo 6°

    Mostly sunny and pleasant

    Moderate indoor dust & dander levels
    • Precip
      0%
    • Wind
      Speed
      6 k/h
    • Cloud
      Cover
      19%
    more
  • Sat

    Sep 20

    20°Lo 16°

    Mostly cloudy and breezy

    Low indoor dust & dander levels
    • Precip
      9%
    • Wind
      Speed
      19 k/h
    • Cloud
      Cover
      76%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Wed
6am
7am 8am 9am 10am 11am 12pm 1pm
  6am 7am 8am 9am 10am 11am 12pm 1pm
Forecast
Mostly Clear
Mostly Sunny
Sunny
Mostly Sunny
Mostly Sunny
Partly Sunny
Partly Sunny
Partly Cloudy
Temp (°C) 10° 12° 13° 14° 15°
RealFeel® 11° 14° 17° 18° 19°
Humidity 98% 88% 82% 76% 72% 70% 66% 64%
   
  6am 7am 8am 9am 10am 11am 12pm 1pm
Rain
 
2%
 
4%
 
7%
 
7%
 
7%
 
7%
 
7%
 
7%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  6am 7am 8am 9am 10am 11am 12pm 1pm
Wind (km/h) 8 WSW 6 WSW 5 NW 5 NNW 5 NNW 3 NNW 5 NW 6 WNW
UV Index 0 0 0 1 2 3 4 4
Cloud Cover 11% 11% 1% 15% 29% 42% 47% 51%
Dew Point
Middle Grid line 20 C Middle Grid line 15 C Middle Grid line 10 C Middle Grid line 5 C Middle Grid line 0 C

Temperature History - Sep 17

more Historical Weather Data >
  Today Normal Record 9/17/2013
High 17° 19° 30° (1942) 18°
Low -1° (1950)

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:43 AM with 12:27 of sunlight, then sets at 7:10 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 12:29 AM with 15:00 of moolight, then sets at 3:29 PM

Top Story

Ottawa Weather Report

Widespread Frost, Killing Freeze to Seize Northeast Late This Week

September 16, 2014; 4:39 PM ET

The chilliest air of the season so far will settle over much of the Northeast Thursday into Friday and will bring frost to more areas than experienced frost early this week. more >