• Today

    Sep 16

    65°Lo 42°

    Mostly sunny

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      4%
    • Hi
      RealFeel
      72°
    more
  • Wed

    Sep 17

    68°Lo 45°

    Mostly sunny and pleasant

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      5%
    • Hi
      RealFeel
      73°
  • Thu

    Sep 18

    69°Lo 50°

    Sunshine and pleasant

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      2%
    • Hi
      RealFeel
      70°
    more
  • Fri

    Sep 19

    73°Lo 59°

    Times of clouds and sun

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      5%
    • Hi
      RealFeel
      72°
    more
  • Sat

    Sep 20

    78°Lo 62°

    A couple of p.m. t-storms

    Excellent for lawn mowing
    • Hours of Precip
      7
    • Precip
      60%
    • Hi
      RealFeel
      76°
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Wed
4am
5am 6am 7am 8am 9am 10am 11am
  4am 5am 6am 7am 8am 9am 10am 11am
Forecast
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Temp (°F) 42° 42° 43° 44° 48° 53° 59° 63°
RealFeel® 43° 42° 43° 44° 49° 55° 64° 70°
Humidity 87% 90% 90% 88% 83% 73% 64% 58%
   
  4am 5am 6am 7am 8am 9am 10am 11am
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  4am 5am 6am 7am 8am 9am 10am 11am
Wind (mph) 2 W 2 WNW 2 WNW 2 WNW 2 WSW 3 WSW 3 WSW 3 WSW
UV Index 0 0 0 0 0 1 3 4
Cloud Cover 11% 11% 11% 11% 11% 11% 11% 11%
Dew Point 39° 39° 41° 41° 44° 45° 47° 48°
Middle Grid line 65 F 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 - Sep 17

more Historical Weather Data >
  Today Normal Record 9/17/2013
High 68° 72° N/A 70°
Low 45° 48° N/A 35°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:35 AM with 12:25 of sunlight, then sets at 7:00 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 12:30 AM with 14:43 of moolight, then sets at 3:13 PM

Top Story

Crystal Lake Weather Report

Chicago: Cooler, Fall-Like Temperatures to Linger

September 16, 2014; 9:12 AM ET

The cooler, below-average conditions responsible for the fall-like feel will hold through the end of the week over the Chicago area. 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?

Wed. Overnight Freeze

Wed. Degree Days

Wed. Evapotranspiration