• Tonight

    May 21

    Lo 13°

    Periods of rain

    Dust & Dander Weather
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      7 - Low
  • Wed

    May 22

    22°Lo 12°

    Mainly cloudy, a little rain

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

    May 23

    19°Lo 3°

    Periods of rain

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

    May 24

    15°Lo 1°

    A shower possible

    Extreme indoor dust & dander levels
    • Precip
      30%
    • Wind
      Speed
      19 k/h
    • Cloud
      Cover
      58%
    more
  • Sat

    May 25

    17°Lo 4°

    Partly sunny

    Extreme indoor dust & dander levels
    • Precip
      1%
    • Wind
      Speed
      13 k/h
    • Cloud
      Cover
      29%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
10pm
11pm Wed
12am
1am 2am 3am 4am 5am
  10pm 11pm 12am 1am 2am 3am 4am 5am
Forecast
Rain
Rain
Rain
Rain
Cloudy
Cloudy
Cloudy
Rain
Temp (°C) 14° 14° 13° 13° 14° 14° 14° 14°
RealFeel® 10° 10° 12° 13° 13° 13° 13°
Humidity 92% 93% 93% 93% 92% 93% 92% 92%
   
  10pm 11pm 12am 1am 2am 3am 4am 5am
Rain
 
52%
 
70%
 
67%
 
67%
 
40%
 
34%
 
40%
 
58%
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) 18 ENE 16 E 11 E 6 E 5 E 5 ESE 5 NNW 5 NNW
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 98% 98% 100% 97% 97% 95% 94% 94%
Dew Point 12° 12° 12° 12° 12° 12° 13° 13°
Middle Grid line 15 C Middle Grid line 10 C

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 5:27 AM with 15:06 of sunlight, then sets at 8:33 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:34 PM with 11:02 of moolight, then sets at 3:36 AM

Top Story

Nepean Weather Report

Severe Thunderstorm Threat Continues Wednesday

May 21, 2013; 3:42 PM ET

Potential for strong thunderstorms again Wednesday. more >