• Today

    Aug 20

    84°Lo 68°

    Sun mixing with clouds

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

    92°Lo 68°

    Clouds and sun; hot, humid

    Ragweed Pollen Weather
    • Precip
      22%
    • Wind
      Speed
      7 mph
    • Cloud
      Cover
      46%
    more
Next Previous
A shower or thunderstorm 75° Lo 73° RealFeel® 78° / 74°

N

E

S

W

  • Precipitation: 55%
  • Rain: 0.05 in
  • Snow: 0 in
  • Humidity: 90%
  • Cloud Cover: 45%
  • Dew Point: 71° F
  • Visibility: 9 mi
5 mph

Temperature History - Aug 21

more Historical Weather Data >
  Today Normal Record 8/21/2013
High 87° 79° N/A 87°
Low 73° 58° N/A 59°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:07 AM with 13:38 of sunlight, then sets at 7:45 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:35 AM with 14:40 of moolight, then sets at 5:15 PM

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 >

Thu. Pollen

Thu. Dust & Dander

Thu. Wind Maps