• Today

    Aug 20

    85°Lo 68°

    Sun mixing with clouds

    Moderate ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      30 - Moderate
    • Tree
      Pollen
      0 - Low
  • Thu

    Aug 21

    87°Lo 73°

    A couple of thunderstorms

    Moderate ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      30 - Moderate
    • Tree
      Pollen
      0 - Low
    more
  • Fri

    Aug 22

    89°Lo 71°

    Some sun with a thunderstorm

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

    Aug 23

    89°Lo 70°

    A p.m. t-storm possible

    Moderate ragweed pollen levels
    • Precip
      30%
    • Wind
      Speed
      6 mph
    • Cloud
      Cover
      70%
    more
  • Sun

    Aug 24

    90°Lo 68°

    Clouds and sun; hot, humid

    Ragweed Pollen Weather
    • Precip
      22%
    • Wind
      Speed
      7 mph
    • Cloud
      Cover
      46%
    more
Next Previous
Sunny 71° RealFeel® 71°

N

E

S

W

  • Humidity: 87%
  • Pressure: 29.85 in
  • UV Index: 4
  • Cloud Cover: 5%
  • Ceiling: 37500 ft
  • Dew Point: 67° F
  • Visibility: 10 mi
3 mph

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:06 AM with 13:41 of sunlight, then sets at 7:47 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:44 AM with 14:49 of moolight, then sets at 4:33 PM

Temperature Summary - 9:31 AM

  Temp (°F)
Now 71°
Yesterday 69°
RealFeel® 71°
RealFeel® Shade 66°
Wind Chill 71°
Dew Point 67°
  Hi / Lo
Previous 6 Hours 71°
  62°
Previous 12 Hours 71°
  62°
Previous 24 Hours 81°
  62°

Temperature History - Aug 20

more Historical Weather Data >
  Today Normal Record 8/20/2013
High 85° 80° N/A 84°
Low 68° 58° N/A 53°

Precipitation Summary - 9:31 AM

  Amount (in)
Previous 1 Hour 0
Previous 3 Hours 0
Previous 6 Hours 0
Previous 9 Hours 0
Previous 12 Hours 0
Previous 18 Hours 0.01
Previous 24 Hours 0.01
Top Story

Crystal Lake Weather Report

Chicago: Showers, Thunderstorms to Return Thursday

August 20, 2014; 3:53 AM ET

There will be an uptick in humidity and storms in Chicago for much of this week. more >

Wed. Pollen

Wed. Dust & Dander

Wed. Wind Maps