• Tonight

    Apr 21

    Lo 31°

    Partly cloudy and chilly

    Bicycling Weather
    • Precip
      57%
    • Hours of Precip
      1.5
    • Wind
      Gust
      51 mph
  • Wed

    Apr 22

    54°Lo 30°

    Sunny, windy and cool

    Fair for biking
    • Precip
      3%
    • Hours of Precip
      0
    • Wind
      Gust
      31 mph
    more
  • Thu

    Apr 23

    59°Lo 34°

    Plenty of sun

    Very Good for biking
    • Precip
      2%
    • Hours of Precip
      0
    • Wind
      Gust
      22 mph
    more
  • Fri

    Apr 24

    63°Lo 42°

    Sun giving way to clouds

    Excellent for biking
    • Precip
      6%
    • Hours of Precip
      0
    • Wind
      Gust
      14 mph
    more
  • Sat

    Apr 25

    57°Lo 37°

    Periods of rain

    Poor for biking
    • Precip
      65%
    • Hours of Precip
      3
    • Wind
      Gust
      20 mph
    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
Mostly Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Showers
Temp (°F) 40° 44° 49° 52° 54° 55° 56° 57°
RealFeel® 32° 35° 40° 43° 46° 48° 49° 49°
Humidity 64% 54% 46% 41% 35% 31% 30% 29%
   
  8am 9am 10am 11am 12pm 1pm 2pm 3pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
1%
 
49%
 
53%
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) 12 WSW 17 W 21 W 23 W 24 W 25 W 26 W 28 W
UV Index 1 1 2 2 3 4 3 4
Cloud Cover 28% 84% 95% 97% 98% 91% 94% 81%
Dew Point 29° 29° 29° 29° 26° 25° 25° 25°
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 Middle Grid line 35 F

Temperature History - Apr 21

more Historical Weather Data >
  Today Normal Record 4/21/2014
High 57° 64° 91° (1987) 74°
Low 31° 40° 29° (1988) 55°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:08 AM with 13:35 of sunlight, then sets at 7:43 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:25 AM with 14:41 of moolight, then sets at 11:06 PM

Peru Weather Report

Chicago: Temperatures to Plummet After Extended Warm Spell

April 21, 2015; 3:17 PM ET

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

Is Your Outdoor Gear Waterproof?

Dec 5, 2012; 5:00 AM ET Now that it's cold enough to hit the slopes, you may want to look more closely at what materials your winter sports gear is made of. As it turns out, not all waterproofing is created equal.