• Today

    Sep 2

    90°Lo 69°

    Fog in the a.m.; partly sunny

    Very Good for lawn mowing
    • Hours of Precip
      0.5
    • Precip
      25%
    • Hi
      RealFeel
      97°
    more
  • Thu

    Sep 3

    89°Lo 69°

    Partly sunny and very warm

    Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      19%
    • Hi
      RealFeel
      96°
    more
  • Fri

    Sep 4

    89°Lo 69°

    Very warm with periods of sun

    Very Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      25%
    • Hi
      RealFeel
      101°
  • Sat

    Sep 5

    89°Lo 68°

    Sunshine, very warm and humid

    Very Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      25%
    • Hi
      RealFeel
      98°
    more
  • Sun

    Sep 6

    90°Lo 70°

    Mostly sunny and very warm

    Very Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      9%
    • Hi
      RealFeel
      94°
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Fri
5pm
6pm 7pm 8pm 9pm 10pm 11pm Sat
12am
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Forecast
Partly Sunny
Partly Sunny
Partly Sunny
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Clear
Temp (°F) 87° 85° 81° 79° 78° 76° 75° 74°
RealFeel® 94° 91° 85° 82° 80° 78° 77° 76°
Humidity 60% 62% 67% 69% 75% 79% 79% 82%
   
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Rain
 
7%
 
7%
 
7%
 
6%
 
6%
 
6%
 
6%
 
6%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
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0%
   
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Wind (mph) 5 SSE 4 SE 4 SE 5 SE 5 ESE 6 ESE 6 ESE 6 ESE
UV Index 2 1 0 0 0 0 0 0
Cloud Cover 46% 46% 46% 26% 26% 26% 26% 26%
Dew Point 71° 71° 70° 69° 69° 69° 68° 68°
Middle Grid line 90 F Middle Grid line 85 F Middle Grid line 80 F Middle Grid line 75 F Middle Grid line 70 F

Temperature History - Sep 4

more Historical Weather Data >
  Today Normal Record 9/4/2014
High 89° 80° 102° (1925) 86°
Low 69° 59° 41° (1928) 68°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:24 AM with 13:00 of sunlight, then sets at 7:24 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:32 PM with 14:38 of moolight, then sets at 2:10 PM

Ottawa Weather Report

Chicago: More Foggy Mornings in Store as Heat Holds on

September 2, 2015; 5:11 AM ET

Chicagoans can expect to begin September with a stretch of higher temperatures, increasing humidity and more foggy mornings. more >

Why Do Leaves Change Color?

Sep 20, 2011; 5:00 AM ET Why do leaves change from green to beautiful shades of red, orange and yellow in the fall?

Fri. Degree Days

Fri. Evapotranspiration