• Today

    Aug 21

    83°Lo 74°

    Showers and a heavier t-storm

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

    Aug 22

    91°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

    87°Lo 71°

    Clouds and sun with a t-storm

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

    Aug 24

    91°Lo 74°

    Periods of sun, hot and humid

    Moderate ragweed pollen levels
    • Precip
      25%
    • Wind
      Speed
      7 mph
    • Cloud
      Cover
      48%
    more
  • Mon

    Aug 25

    90°Lo 70°

    An afternoon thunderstorm

    Ragweed Pollen Weather
    • Precip
      51%
    • Wind
      Speed
      7 mph
    • Cloud
      Cover
      26%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
10pm
11pm Fri
12am
1am 2am 3am 4am 5am
  10pm 11pm 12am 1am 2am 3am 4am 5am
Forecast
Cloudy
Mostly Cloudy
T-storms
Mostly Cloudy
Mostly Cloudy
T-storms
Mostly Cloudy
Mostly Cloudy
Temp (°F) 77° 77° 78° 78° 77° 76° 76° 75°
RealFeel® 80° 80° 78° 81° 80° 77° 78° 77°
Humidity 84% 84% 82% 81% 83% 84% 84% 87%
   
  10pm 11pm 12am 1am 2am 3am 4am 5am
Rain
 
48%
 
48%
 
52%
 
48%
 
47%
 
51%
 
47%
 
47%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  10pm 11pm 12am 1am 2am 3am 4am 5am
Wind (mph) 7 S 6 S 5 SSW 5 SSW 4 SSW 4 SSW 4 SW 4 SW
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 93% 84% 76% 76% 76% 76% 76% 76%
Dew Point 72° 72° 72° 72° 71° 71° 71° 70°
Middle Grid line 80 F Middle Grid line 75 F Middle Grid line 70 F

Temperature History - Aug 21

more Historical Weather Data >
  Today Normal Record 8/21/2013
High 83° 82° 99° (1955) 90°
Low 74° 63° 46° (1950) 68°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:05 AM with 13:39 of sunlight, then sets at 7:44 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:34 AM with 14:39 of moolight, then sets at 5:13 PM

Top Story

Prospect Heights Weather Report

Chicago: Threat of Thunderstorms Lingers After Heavy Rains Flood Wrigley Field

August 21, 2014; 8:51 AM ET

While there may be a mix of sunshine and clouds over the area, Chicago is facing more rounds of thunderstorms over the next several days. more >

Thu. Pollen

Thu. Dust & Dander

Thu. Wind Maps