• Tonight

    Feb 27

    Lo -4°

    Mainly clear and frigid

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

    Feb 28

    18°Lo 13°

    Mostly sunny and very cold

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

    Mar 1

    26°Lo 7°

    Cloudy, a bit of snow; cold

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

    Mar 2

    26°Lo 23°

    Mostly sunny and cold

    Low ragweed pollen levels
    • Precip
      14%
    • Wind
      Speed
      6 mph
    • Cloud
      Cover
      29%
    more
  • Tue

    Mar 3

    39°Lo 12°

    Ice changing to rain

    Ragweed Pollen Weather
    • Precip
      77%
    • Wind
      Speed
      12 mph
    • Cloud
      Cover
      99%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sat
9am
10am 11am 12pm 1pm 2pm 3pm 4pm
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Sunny
Sunny
Sunny
Sunny
Sunny
Sunny
Mostly Sunny
Partly Sunny
Temp (°F) 11° 15° 17° 18° 18° 17° 16°
RealFeel® 10° 14° 17° 17° 14° 10°
Humidity 57% 58% 52% 50% 49% 54% 58% 60%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
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0%
Ice
 
0%
 
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  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (mph) 7 SSW 7 SSW 7 S 8 S 8 S 8 S 9 S 8 SSE
UV Index 2 3 3 4 3 3 2 1
Cloud Cover 0% 1% 1% 0% 0% 0% 10% 35%
Dew Point -4° -1°
Middle Grid line 20 F Middle Grid line 15 F Middle Grid line 10 F Middle Grid line 5 F

Temperature History - Feb 28

more Historical Weather Data >
  Today Normal Record 2/28/2014
High 18° 36° N/A 24°
Low 13° 17° N/A -13°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:31 AM with 11:11 of sunlight, then sets at 5:42 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:21 PM with 14:35 of moolight, then sets at 3:56 AM

Crystal Lake Weather Report

Chicago: Snow Looms for Late Weekend as Cold Air Lingers

February 27, 2015; 4:24 PM 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?

Sat. Pollen

Sat. Dust & Dander

Sat. Wind Maps