• Early AM

    Apr 21

    Lo 36°

    Colder

    Lawn Mowing Weather
    • Hours of Precip
      0
    • Precip
      1%
    • Hi
      RealFeel
      44°
    more
  • Today

    Apr 21

    57°Lo 31°

    Strong winds; partly sunny

    Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      24%
    • Hi
      RealFeel
      51°
  • Wed

    Apr 22

    53°Lo 30°

    Sunny, windy and cool

    Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      3%
    • Hi
      RealFeel
      47°
    more
  • Thu

    Apr 23

    59°Lo 31°

    Breezy with plenty of sun

    Very Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      2%
    • Hi
      RealFeel
      56°
    more
  • Fri

    Apr 24

    62°Lo 36°

    A thick cloud cover

    Poor for lawn mowing
    • Hours of Precip
      0
    • Precip
      5%
    • Hi
      RealFeel
      63°
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
8am
9am 10am 11am 12pm 1pm 2pm 3pm
  8am 9am 10am 11am 12pm 1pm 2pm 3pm
Forecast
Mostly Sunny
Sunny
Sunny
Sunny
Sunny
Mostly Sunny
Partly Sunny
Partly Sunny
Temp (°F) 41° 45° 48° 51° 53° 55° 56° 57°
RealFeel® 31° 36° 40° 44° 46° 49° 50° 51°
Humidity 64% 54% 48% 43% 36% 32% 31% 30%
   
  8am 9am 10am 11am 12pm 1pm 2pm 3pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
1%
 
6%
 
6%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  8am 9am 10am 11am 12pm 1pm 2pm 3pm
Wind (mph) 15 WSW 18 W 23 W 25 W 28 W 29 W 28 W 28 W
UV Index 1 2 4 5 6 7 6 5
Cloud Cover 13% 2% 0% 1% 6% 15% 31% 49%
Dew Point 30° 29° 29° 29° 27° 26° 25° 26°
Middle Grid line 60 F Middle Grid line 55 F Middle Grid line 50 F Middle Grid line 45 F Middle Grid line 40 F

Temperature History - Apr 21

more Historical Weather Data >
  Today Normal Record 4/21/2014
High 57° 65° 88° (1987) 64°
Low 31° 42° 25° (1904) 43°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:07 AM with 13:35 of sunlight, then sets at 7:42 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:24 AM with 14:40 of moolight, then sets at 11:04 PM

Ottawa Weather Report

Chicago: Temperatures to Plummet After Extended Warm Spell

April 21, 2015; 4:17 AM ET

After a two-week stretch of above-normal temperatures, Chicago is set to fall into a chilly pattern into late this week. 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?

Current Drought Status

Current Soil Conditions

Tue. Overnight Freeze

Tue. Degree Days

Tue. Evapotranspiration