• Today

    Apr 17

    58°Lo 39°

    Rather cloudy and milder

    High indoor dust & dander levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
  • Fri

    Apr 18

    55°Lo 33°

    Clouds giving way to some sun

    Moderate indoor dust & dander levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Sat

    Apr 19

    67°Lo 46°

    Partly sunny

    Moderate indoor dust & dander levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Sun

    Apr 20

    70°Lo 51°

    Mostly cloudy with a shower

    Low indoor dust & dander levels
    • Precip
      55%
    • Wind
      Speed
      10 mph
    • Cloud
      Cover
      77%
    more
  • Mon

    Apr 21

    68°Lo 45°

    Mostly cloudy, showers around

    Low indoor dust & dander levels
    • Precip
      70%
    • Wind
      Speed
      5 mph
    • Cloud
      Cover
      76%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
10am
11am 12pm 1pm 2pm 3pm 4pm 5pm
  10am 11am 12pm 1pm 2pm 3pm 4pm 5pm
Forecast
Mostly Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Temp (°F) 47° 51° 52° 54° 57° 58° 57° 57°
RealFeel® 42° 47° 50° 53° 56° 56° 54° 53°
Humidity 60% 56% 54% 51% 49% 47% 46% 48%
   
  10am 11am 12pm 1pm 2pm 3pm 4pm 5pm
Rain
 
3%
 
3%
 
3%
 
6%
 
14%
 
14%
 
18%
 
37%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  10am 11am 12pm 1pm 2pm 3pm 4pm 5pm
Wind (mph) 12 S 11 SSW 11 SW 10 SW 10 WSW 10 WSW 10 WSW 9 WSW
UV Index 3 3 4 4 4 3 2 1
Cloud Cover 89% 90% 90% 90% 91% 94% 97% 99%
Dew Point 34° 36° 36° 37° 38° 37° 37° 37°
Middle Grid line 60 F Middle Grid line 55 F Middle Grid line 50 F Middle Grid line 45 F

Temperature History - Apr 17

more Historical Weather Data >
  Today Normal Record 4/17/2013
High 58° 57° N/A 41°
Low 39° 35° N/A 36°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:10 AM with 13:27 of sunlight, then sets at 7:37 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 10:24 PM with 10:03 of moolight, then sets at 8:27 AM

Top Story

Crystal Lake Weather Report

Chicago: Chilly Weather to Return for the Weekend

April 17, 2014; 3:33 AM ET

While the city warmed up a bit at midweek, chilly weather will return for Friday. more >

Is it a Cold or the Flu?

Apr 7, 2014; 5:00 AM ET Symptoms caused by the common cold can often resemble those associated with the influenza virus, so how do you differentiate between the two?

Thu. Pollen

Thu. Dust & Dander

Thu. Wind Maps