• Today

    Jul 31

    22°Lo 12°

    A couple of thunderstorms

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      0 - Low
  • Fri

    Aug 1

    26°Lo 14°

    An afternoon shower or two

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      0 - Low
    more
  • Sat

    Aug 2

    27°Lo 15°

    A p.m. t-storm in spots

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      0 - Low
    more
  • Sun

    Aug 3

    27°Lo 15°

    Mainly cloudy with a t-storm

    Low ragweed pollen levels
    • Precip
      55%
    • Wind
      Speed
      3 k/h
    • Cloud
      Cover
      76%
    more
  • Mon

    Aug 4

    26°Lo 14°

    A stray afternoon shower

    Ragweed Pollen Weather
    • Precip
      54%
    • Wind
      Speed
      3 k/h
    • Cloud
      Cover
      40%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
10pm
11pm Fri
12am
1am 2am 3am 4am 5am
  10pm 11pm 12am 1am 2am 3am 4am 5am
Forecast
T-storms
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Clear
Temp (°C) 17° 16° 16° 15° 15° 14° 14° 13°
RealFeel® 14° 14° 14° 13° 13° 12° 12° 12°
Humidity 86% 85% 85% 86% 86% 87% 87% 87%
   
  10pm 11pm 12am 1am 2am 3am 4am 5am
Rain
 
51%
 
38%
 
32%
 
28%
 
20%
 
20%
 
20%
 
20%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  10pm 11pm 12am 1am 2am 3am 4am 5am
Wind (km/h) 10 SSW 8 SSW 8 SSW 8 SSW 8 SSW 8 SSW 8 SSW 8 SSW
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 26% 26% 26% 26% 26% 26% 26% 26%
Dew Point 14° 13° 13° 13° 12° 12° 12° 11°
Middle Grid line 20 C Middle Grid line 15 C Middle Grid line 10 C

Temperature History - Jul 31

more Historical Weather Data >
  Today Normal Record 7/31/2013
High 22° 26° 35° (2012) 27°
Low 12° 15° (1978) 12°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:45 AM with 14:47 of sunlight, then sets at 8:32 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 10:26 AM with 12:00 of moolight, then sets at 10:26 PM

Top Story

Ottawa Weather Report

Smoke From Canada Wildfires to Impact Chicago, NYC

July 31, 2014; 5:02 AM ET

Ongoing wildfires in Ontario and western Canada will impact areas across the Great Lakes to the Northeast through the weekend. more >