• Tonight

    Feb 28

    Lo 13°

    Cloudy, a bit of snow; frigid

    Ragweed Pollen Weather
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      0 - Low
    more
  • Sun

    Mar 1

    26°Lo 8°

    Cloudy and cold with flurries

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      0 - Low
  • Mon

    Mar 2

    26°Lo 23°

    Mostly sunny and cold

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

    Mar 3

    37°Lo 8°

    A wintry mix changing to rain

    Low ragweed pollen levels
    • Precip
      86%
    • Wind
      Speed
      17 mph
    • Cloud
      Cover
      99%
    more
  • Wed

    Mar 4

    16°Lo -1°

    Mostly cloudy and much colder

    Ragweed Pollen Weather
    • Precip
      25%
    • Wind
      Speed
      16 mph
    • Cloud
      Cover
      70%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sun
9am
10am 11am 12pm 1pm 2pm 3pm 4pm
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Cloudy
Cloudy
Flurries
Flurries
Cloudy
Flurries
Cloudy
Cloudy
Temp (°F) 20° 22° 24° 26° 26° 26° 24° 23°
RealFeel® 19° 20° 19° 20° 21° 16° 15° 13°
Humidity 76% 74% 70% 68% 68% 73% 77% 81%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
38%
 
49%
 
54%
 
54%
 
43%
 
51%
 
47%
 
47%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (mph) 5 SSW 6 SW 7 SW 7 SW 8 SW 9 WSW 10 WSW 10 WSW
UV Index 0 1 1 1 1 1 1 0
Cloud Cover 99% 100% 100% 99% 96% 94% 95% 100%
Dew Point 14° 15° 16° 16° 17° 18° 18° 18°
Middle Grid line 30 F Middle Grid line 25 F Middle Grid line 20 F Middle Grid line 15 F

Temperature History - Mar 1

more Historical Weather Data >
  Today Normal Record 3/1/2014
High 26° 36° N/A 20°
Low 18° N/A

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:29 AM with 11:14 of sunlight, then sets at 5:43 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:15 PM with 14:18 of moolight, then sets at 4:33 AM

Crystal Lake Weather Report

Chicago: Snow Looms for Late Weekend as Cold Air Lingers

February 28, 2015; 11:24 AM ET

The Chicago area will continue to endure a cold air into late in the weekend as the next round of snow could hit the region on Sunday. more >

Making a Forecast: The Sixth Sense

Feb 16, 2015; 5:00 AM ET What steps go into making a forecast?

Sun. Pollen

Sun. Dust & Dander

Sun. Wind Maps