• Today

    Sep 1

    90°Lo 69°

    Hazy with a t-storm in spots

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Wed

    Sep 2

    91°Lo 69°

    Fog in the a.m.; partly sunny

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
  • Thu

    Sep 3

    90°Lo 68°

    Hot with sun and some clouds

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Fri

    Sep 4

    88°Lo 66°

    Mostly sunny and very warm

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

    Sep 5

    87°Lo 64°

    Mostly sunny, warm and humid

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Wed
1am
2am 3am 4am 5am 6am 7am 8am
  1am 2am 3am 4am 5am 6am 7am 8am
Forecast
Clear
Clear
Mostly Clear
Mostly Clear
Fog
Fog
Fog
Fog
Temp (°F) 73° 72° 72° 71° 71° 69° 70° 73°
RealFeel® 75° 73° 73° 73° 72° 70° 71° 75°
Humidity 85% 84% 86% 87% 88% 91% 89% 84%
   
  1am 2am 3am 4am 5am 6am 7am 8am
Rain
 
0%
 
2%
 
2%
 
2%
 
2%
 
2%
 
1%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  1am 2am 3am 4am 5am 6am 7am 8am
Wind (mph) 6 SW 6 SW 6 SW 5 SW 5 SW 5 SW 4 SW 5 SW
UV Index 0 0 0 0 0 0 0 1
Cloud Cover 2% 7% 12% 16% 18% 17% 16% 14%
Dew Point 68° 67° 67° 67° 67° 66° 67° 68°
Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F

Temperature History - Sep 2

more Historical Weather Data >
  Today Normal Record 9/2/2014
High 91° 81° 101° (1953) 83°
Low 69° 60° 40° (1946) 62°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:22 AM with 13:05 of sunlight, then sets at 7:27 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 10:04 PM with 14:01 of moolight, then sets at 12:05 PM

Ottawa Weather Report

Chicago: More Foggy Mornings in Store as Heat Holds on

September 1, 2015; 4:41 AM ET

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

Wed. Pollen

Wed. Dust & Dander

Wed. Wind Maps