• Today

    May 21

    84°Lo 61°

    An afternoon thunderstorm

    Extreme indoor dust & dander levels
    • Grass
      Pollen
      12 - Moderate
    • Ragweed
      Pollen
      30 - Moderate
    • Tree
      Pollen
      650 - High

  • Wed

    May 22

    73°Lo 51°

    A couple of thunderstorms

    Very High indoor dust & dander levels
    • Grass
      Pollen
      12 - Moderate
    • Ragweed
      Pollen
      30 - Moderate
    • Tree
      Pollen
      650 - High
    more

  • Thu

    May 23

    58°Lo 45°

    Cooler with a few showers

    Extreme indoor dust & dander levels
    • Grass
      Pollen
      12 - Moderate
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      650 - High
    more

  • Fri

    May 24

    62°Lo 45°

    Mostly sunny and cool

    Extreme indoor dust & dander levels
    • Precip
      0%
    • Wind
      Speed
      9 mph
    • Cloud
      Cover
      11%
    more

  • Sat

    May 25

    66°Lo 51°

    Times of sun and clouds

    Extreme indoor dust & dander levels
    • Precip
      25%
    • Wind
      Speed
      3 mph
    • Cloud
      Cover
      61%
    more
Next Previous
Hi 84° RealFeel® 83° Precipitation 70%

Day

N

E

S

W

  • SW 12 mph
  • Gusts: 28 mph

Mostly cloudy and warm; a t-storm this afternoon; thunderstorms can bring hail and damaging winds

  • Max UV Index: 6 (High)
  • Thunderstorms: 60%
  • Precipitation: 0.4 in
  • Rain: 0.4 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs
Lo 61° RealFeel® 58° Precipitation 65%

Night

N

E

S

W

  • S 5 mph
  • Gusts: 13 mph

Mild with periods of rain and a thunderstorm

  • Max UV Index: N/A
  • Thunderstorms: 60%
  • Precipitation: 0.29 in
  • Rain: 0.29 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 3.5 hrs
  • Hours of Rain: 3.5 hrs

Chicago Pollen Levels - May 21

  • Extreme
  • Very High
  • High
  • Moderate
  • Low

  • Grass

    Pollen

    Moderate

  • Weed

    Pollen

    Moderate

  • Tree

    Pollen

    High

  • Mold

    Pollen

    Low

Temperature History - May 21

more Historical Weather Data >
  Today Normal Record 5/21/2012
High 84° 72° 94° (1934) 65°
Low 61° 53° 34° (2002) 54°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:25 AM with 14:45 of sunlight, then sets at 8:10 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:19 PM with 11:11 of moolight, then sets at 3:30 AM

Smoke Alert: The Hidden Dangers of E-Cigarettes

May 20, 2013; 5:00 AM ET E-cigarette manufacturers claim the devices can help a person quit smoking but have those claims ever been proven?

Tue. Pollen

Tue. Dust & Dander

Tue. Wind Maps