• Today

    Jul 31

    81°Lo 58°

    A thunderstorm in spots

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      81°
    • UV
      7 - High
    • Cloud
      Cover
      38%
  • Fri

    Aug 1

    81°Lo 58°

    A t-storm in the afternoon

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      88°
    • UV
      7 - High
    • Cloud
      Cover
      53%
    more
  • Sat

    Aug 2

    81°Lo 55°

    Some sun with a thunderstorm

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      88°
    • UV
      7 - High
    • Cloud
      Cover
      45%
    more
  • Sun

    Aug 3

    82°Lo 60°

    Partly sunny and pleasant

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      90°
    • UV
      7 - High
    • Cloud
      Cover
      26%
    more
  • Mon

    Aug 4

    82°Lo 62°

    A thunderstorm possible

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      90°
    • UV
      7 - High
    • Cloud
      Cover
      51%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
8pm
9pm 10pm 11pm Fri
12am
1am 2am 3am
  8pm 9pm 10pm 11pm 12am 1am 2am 3am
Forecast
Mostly Sunny
T-storms
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Clear
Temp (°F) 72° 70° 67° 65° 64° 63° 61° 60°
RealFeel® 68° 65° 63° 63° 63° 61° 60° 58°
Humidity 63% 70% 76% 79% 81% 82% 83% 86%
   
  8pm 9pm 10pm 11pm 12am 1am 2am 3am
Rain
 
47%
 
51%
 
47%
 
32%
 
32%
 
28%
 
20%
 
20%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  8pm 9pm 10pm 11pm 12am 1am 2am 3am
Wind (mph) 5 WSW 4 WSW 3 SW 3 SW 3 SW 3 W 3 SW 3 SW
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 26% 26% 26% 26% 26% 26% 26% 26%
Dew Point 59° 60° 59° 58° 58° 57° 56° 56°
Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F

Temperature History - Jul 31

more Historical Weather Data >
  Today Normal Record 7/31/2013
High 81° 81° N/A 74°
Low 58° 60° N/A 56°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:45 AM with 14:29 of sunlight, then sets at 8:14 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 10:18 AM with 12:01 of moolight, then sets at 10:19 PM

Top Story

Crystal Lake Weather Report

Late-Week Thunderstorms in Store for Chicago

July 31, 2014; 2:58 AM ET

Thunderstorms will move into the Chicago area later this week, and the threat for storms will remain into the weekend. more >

Battling the Common Cold

Jun 23, 2014; 5:00 AM ET Marja Martinez talks about identifying and fighting the common cold.

Thu. Sinus Headache

Thu. UV Index