• Today

    Sep 2

    90°Lo 70°

    Partly sunny, hot and humid

    Good for lawn mowing
    • Hours of Precip
      1
    • Precip
      10%
    • Hi
      RealFeel
      97°
    more
  • Thu

    Sep 3

    89°Lo 69°

    Times of clouds and sun

    Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      24%
    • Hi
      RealFeel
      97°
  • Fri

    Sep 4

    89°Lo 70°

    A thunderstorm in spots

    Good for lawn mowing
    • Hours of Precip
      0.5
    • Precip
      40%
    • Hi
      RealFeel
      99°
    more
  • Sat

    Sep 5

    89°Lo 70°

    Partly sunny and very warm

    Very Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      25%
    • Hi
      RealFeel
      94°
    more
  • Sun

    Sep 6

    90°Lo 71°

    Partly sunny and very warm

    Very Good for lawn mowing
    • Hours of Precip
      0.5
    • Precip
      5%
    • Hi
      RealFeel
      93°
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
7am
8am 9am 10am 11am 12pm 1pm 2pm
  7am 8am 9am 10am 11am 12pm 1pm 2pm
Forecast
Partly Cloudy
Partly Sunny
Partly Sunny
Partly Sunny
Partly Sunny
Partly Sunny
Partly Sunny
Partly Sunny
Temp (°F) 71° 73° 76° 79° 82° 84° 86° 87°
RealFeel® 72° 75° 80° 87° 91° 92° 94° 96°
Humidity 87% 84% 79% 75% 71% 64% 60% 60%
   
  7am 8am 9am 10am 11am 12pm 1pm 2pm
Rain
 
34%
 
14%
 
14%
 
14%
 
14%
 
14%
 
9%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  7am 8am 9am 10am 11am 12pm 1pm 2pm
Wind (mph) 5 S 6 SSW 6 SSW 7 SSW 8 SW 8 SW 9 SW 9 SW
UV Index 0 1 2 3 4 5 6 5
Cloud Cover 70% 46% 46% 46% 46% 46% 46% 46%
Dew Point 67° 68° 69° 71° 72° 70° 70° 72°
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 3

more Historical Weather Data >
  Today Normal Record 9/3/2014
High 89° 81° 98° (1925) 85°
Low 69° 59° 42° (1974) 63°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:23 AM with 13:02 of sunlight, then sets at 7:25 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 10:46 PM with 14:24 of moolight, then sets at 1:10 PM

Ottawa Weather Report

Chicago: Sun, Humidity to Grip Region Before Stormy Labor Day

September 2, 2015; 3:34 PM ET

As the Labor Day weekend shapes up, Chicago residents will see mostly sunny and humid conditions until the holiday itself on Monday. 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?

Thu. Overnight Freeze

Thu. Degree Days

Thu. Evapotranspiration