• Tonight

    Sep 20

    Lo 17°

    Cloudy, t-storms; breezy late

    Sinus Headache Weather
    • Hi
      RealFeel
      23°
    • UV
      4 - Moderate
    • Cloud
      Cover
      78%
  • Sun

    Sep 21

    21°Lo 8°

    A couple of thunderstorms

    Neutral weather for sinus headaches
    • Hi
      RealFeel
      20°
    • UV
      4 - Moderate
    • Cloud
      Cover
      77%
    more
  • Mon

    Sep 22

    15°Lo 6°

    Partly sunny and cooler

    At Risk weather for sinus headaches
    • Hi
      RealFeel
      13°
    • UV
      4 - Moderate
    • Cloud
      Cover
      46%
    more
  • Tue

    Sep 23

    21°Lo 10°

    Warmer with a shower possible

    At Risk weather for sinus headaches
    • Hi
      RealFeel
      20°
    • UV
      4 - Moderate
    • Cloud
      Cover
      46%
    more
  • Wed

    Sep 24

    20°Lo 11°

    Sunshine

    At Risk weather for sinus headaches
    • Hi
      RealFeel
      21°
    • UV
      4 - Moderate
    • Cloud
      Cover
      9%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sat
11am
12pm 1pm 2pm 3pm 4pm 5pm 6pm
  11am 12pm 1pm 2pm 3pm 4pm 5pm 6pm
Forecast
Mostly Cloudy
Partly Sunny
Mostly Cloudy
Partly Sunny
Partly Sunny
Cloudy
Cloudy
Cloudy
Temp (°C) 21° 23° 23° 24° 25° 25° 25° 24°
RealFeel® 19° 22° 21° 22° 23° 22° 22° 21°
Humidity 68% 61% 61% 53% 53% 53% 50% 57%
   
  11am 12pm 1pm 2pm 3pm 4pm 5pm 6pm
Rain
 
9%
 
9%
 
9%
 
9%
 
9%
 
10%
 
11%
 
11%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  11am 12pm 1pm 2pm 3pm 4pm 5pm 6pm
Wind (km/h) 27 SW 27 SSW 29 SSW 34 SW 32 SW 26 SW 32 SW 29 SW
UV Index 3 4 4 4 3 1 1 0
Cloud Cover 75% 48% 75% 45% 47% 95% 95% 95%
Dew Point 15° 15° 15° 14° 15° 15° 14° 15°
Middle Grid line 30 C Middle Grid line 25 C Middle Grid line 20 C

Temperature History - Sep 20

more Historical Weather Data >
  Today Normal Record 9/20/2013
High 25° N/A N/A 24°
Low 17° N/A N/A 16°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:02 AM with 12:17 of sunlight, then sets at 7:19 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 3:35 AM with 13:50 of moolight, then sets at 5:25 PM

Top Story

Markham Weather Report

Long Winter Nights, Dry Air Increase Chance to View Aurora

September 20, 2014; 1:40 AM ET

Igniting across Northern skies, ghostly rivers of light dance overhead each year, emitting vibrant shades of green, blue, pink, red and violet. more >