• Tonight

    Sep 16

    Lo 43°

    Mainly clear and chilly

    Ragweed Pollen Weather
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      0 - Low
    more
  • Wed

    Sep 17

    68°Lo 48°

    Mostly sunny and pleasant

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      0 - Low
    more
  • Thu

    Sep 18

    68°Lo 49°

    Sunshine and pleasant

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      0 - Low
  • Fri

    Sep 19

    73°Lo 59°

    Times of clouds and sun

    Low ragweed pollen levels
    • Precip
      5%
    • Wind
      Speed
      10 mph
    • Cloud
      Cover
      46%
    more
  • Sat

    Sep 20

    78°Lo 62°

    A couple of p.m. t-storms

    Ragweed Pollen Weather
    • Precip
      60%
    • Wind
      Speed
      12 mph
    • Cloud
      Cover
      79%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
9am
10am 11am 12pm 1pm 2pm 3pm 4pm
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Temp (°F) 56° 60° 64° 65° 66° 67° 68° 67°
RealFeel® 55° 62° 67° 69° 69° 69° 69° 67°
Humidity 81% 75% 69% 65% 61% 59% 58% 58%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
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0%
Snow
 
0%
 
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Ice
 
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  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (mph) 5 NE 6 ENE 6 ENE 6 ENE 7 ENE 6 ENE 6 ENE 6 ENE
UV Index 1 2 4 5 5 5 4 2
Cloud Cover 25% 25% 25% 25% 25% 25% 25% 25%
Dew Point 50° 52° 53° 53° 52° 52° 52° 52°
Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F

Temperature History - Sep 18

more Historical Weather Data >
  Today Normal Record 9/18/2013
High 68° 72° N/A 78°
Low 49° 48° N/A 52°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:36 AM with 12:22 of sunlight, then sets at 6:58 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:24 AM with 14:28 of moolight, then sets at 3:52 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 >

Thu. Dust & Dander

Thu. Wind Maps