• Today

    Sep 2

    81°Lo 58°

    Times of clouds and sun

    High ragweed pollen levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      70 - High
    • Tree
      Pollen
      0 - Low
    more
  • Wed

    Sep 3

    83°Lo 69°

    Partly sunny

    High ragweed pollen levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      70 - High
    • Tree
      Pollen
      0 - Low
    more
  • Thu

    Sep 4

    89°Lo 70°

    Mostly cloudy, warm and humid

    High ragweed pollen levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      70 - High
    • Tree
      Pollen
      0 - Low
  • Fri

    Sep 5

    76°Lo 55°

    Not as warm with t-storms

    High ragweed pollen levels
    • Precip
      64%
    • Wind
      Speed
      8 mph
    • Cloud
      Cover
      76%
    more
  • Sat

    Sep 6

    72°Lo 51°

    Mostly sunny and nice

    Ragweed Pollen Weather
    • Precip
      11%
    • Wind
      Speed
      6 mph
    • Cloud
      Cover
      21%
    more
Next Previous
A couple of thunderstorms 81° Lo 76° RealFeel® 84° / 78°

N

E

S

W

  • Precipitation: 55%
  • Rain: 0.18 in
  • Snow: 0 in
  • Humidity: 83%
  • Cloud Cover: 76%
  • Dew Point: 73° F
  • Visibility: 8 mi
10 mph

Temperature History - Sep 4

more Historical Weather Data >
  Today Normal Record 9/4/2013
High 89° 77° N/A 80°
Low 70° 54° N/A 47°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:21 AM with 13:01 of sunlight, then sets at 7:22 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:02 PM with 10:11 of moolight, then sets at 2:13 AM

Top Story

Crystal Lake Weather Report

Chicago: Cooler, Less Humid Air to Return by Late Week

September 2, 2014; 2:42 PM ET

While Labor Day marks an unofficial end to the summer, the Chicago area will see warm, humid conditions continue before temperatures slide late in the week. more >

Thu. Dust & Dander

Thu. Wind Maps