• Today

    Sep 18

    69°Lo 50°

    Some sun; fog early

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

    Sep 19

    74°Lo 60°

    Breezy with periods of sun

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

    Sep 20

    79°Lo 59°

    A couple of p.m. t-storms

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

    Sep 21

    71°Lo 48°

    Partly sunny and less humid

    Low ragweed pollen levels
    • Precip
      25%
    • Wind
      Speed
      10 mph
    • Cloud
      Cover
      38%
    more
  • Mon

    Sep 22

    67°Lo 48°

    Times of clouds and sun

    Ragweed Pollen Weather
    • Precip
      25%
    • Wind
      Speed
      6 mph
    • Cloud
      Cover
      50%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
4am
5am 6am 7am 8am 9am 10am 11am
  4am 5am 6am 7am 8am 9am 10am 11am
Forecast
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Sunny
Fog
Partly Cloudy
Partly Cloudy
Partly Cloudy
Temp (°F) 46° 46° 47° 48° 51° 55° 59° 60°
RealFeel® 44° 44° 44° 45° 49° 53° 58° 62°
Humidity 92% 89% 92% 89% 87% 83% 80% 79%
   
  4am 5am 6am 7am 8am 9am 10am 11am
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
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Ice
 
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  4am 5am 6am 7am 8am 9am 10am 11am
Wind (mph) 4 NE 4 NE 4 NE 5 NE 6 ENE 6 ENE 7 ENE 7 NE
UV Index 0 0 0 0 0 1 2 3
Cloud Cover 32% 34% 33% 31% 76% 63% 70% 65%
Dew Point 44° 43° 45° 45° 48° 50° 53° 54°
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

Temperature History - Sep 18

more Historical Weather Data >
  Today Normal Record 9/18/2013
High 69° 72° N/A 78°
Low 50° 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: Chance of Interrupting Thunderstorms for Weekend

September 18, 2014; 3:15 PM ET

Chicago is facing a mostly clear weekend with the threat of some disruptive thunderstorms on Saturday. more >

Thu. Pollen

Thu. Dust & Dander

Thu. Wind Maps