• Today

    Jul 31

    85°Lo 60°

    Sunny to partly cloudy

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      86°
    • UV
      7 - Very High
    • Cloud
      Cover
      23%
  • Sat

    Aug 1

    84°Lo 64°

    Beautiful with sunshine

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      86°
    • UV
      5 - High
    • Cloud
      Cover
      13%
    more
  • Sun

    Aug 2

    84°Lo 67°

    Partly sunny with a t-storm

    Neutral weather for sinus headaches
    • Hi
      RealFeel
      87°
    • UV
      5 - High
    • Cloud
      Cover
      51%
    more
  • Mon

    Aug 3

    84°Lo 60°

    A morning t-storm in spots

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      87°
    • UV
      5 - High
    • Cloud
      Cover
      46%
    more
  • Tue

    Aug 4

    81°Lo 60°

    Delightful with some sun

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      85°
    • UV
      5 - High
    • Cloud
      Cover
      57%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Fri
9am
10am 11am 12pm 1pm 2pm 3pm 4pm
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Partly Sunny
Mostly Sunny
Sunny
Sunny
Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Temp (°F) 73° 78° 81° 82° 84° 84° 85° 84°
RealFeel® 74° 79° 83° 84° 85° 86° 85° 83°
Humidity 59% 51% 45% 39% 36% 34% 35% 34%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
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Snow
 
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Ice
 
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  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (mph) 8 W 10 W 14 W 15 W 17 WNW 16 WNW 17 WNW 17 WNW
UV Index 3 4 6 7 8 7 6 4
Cloud Cover 40% 20% 0% 0% 0% 26% 26% 26%
Dew Point 58° 58° 58° 55° 54° 53° 54° 53°
Middle Grid line 90 F Middle Grid line 85 F Middle Grid line 80 F Middle Grid line 75 F Middle Grid line 70 F

Temperature History - Jul 31

more Historical Weather Data >
  Today Normal Record 7/31/2014
High 85° 81° N/A 80°
Low 60° 60° N/A 50°

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 8:15 PM with 10:58 of moolight, then sets at 7:13 AM

Crystal Lake Weather Report

Chicago: Unsettled Weather to Make Early-Week Return

July 31, 2015; 12:46 AM ET

Temperatures will stay in the 80s, with the daytime high slowly working its way into the low 80s by Monday. more >

New Year, New You

Dec 24, 2012; 5:00 AM ET Start 2013 right with these tips on how to set realistic New Year's resolutions!

Fri. Sinus Headache

Fri. UV Index