• Thu

    Jul 17

    73°Lo 54°

    Times of clouds and sun

    Very Unlikely for a snow day
    • Snow
      0%
    • Ice
      0%
    • Snow
      0 in
    more
  • Fri

    Jul 18

    76°Lo 57°

    Partly sunny with a shower

    Very Unlikely for a snow day
    • Snow
      0%
    • Ice
      0%
    • Snow
      0 in
    more
  • Sat

    Jul 19

    79°Lo 59°

    Partly sunny

    Very Unlikely for a snow day
    • Snow
      0%
    • Ice
      0%
    • Snow
      0 in
    more
  • Sun

    Jul 20

    78°Lo 54°

    A strong afternoon t-storm

    Very Unlikely for a snow day
    • Snow
      0%
    • Ice
      0%
    • Snow
      0 in
  • Mon

    Jul 21

    73°Lo 63°

    Variable clouds with a shower

    Very Unlikely for a snow day
    • Snow
      0%
    • Ice
      0%
    • Snow
      0 in
    more
Next Previous
Hi 78° RealFeel® 83° Precipitation 56%

Day

N

E

S

W

  • S 4 mph
  • Gusts: 12 mph

Cloudy and humid; a passing shower in the morning, watch for a strong thunderstorm in the afternoon

  • Max UV Index: 5 (Moderate)
  • Thunderstorms: 95%
  • Precipitation: 0.26 in
  • Rain: 0.26 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1.5 hrs
  • Hours of Rain: 1.5 hrs
Lo 54° RealFeel® 52° Precipitation 65%

Night

N

E

S

W

  • SSE 4 mph
  • Gusts: 10 mph

Periods of rain and a thunderstorm

  • Max UV Index: N/A
  • Thunderstorms: 31%
  • Precipitation: 0.35 in
  • Rain: 0.35 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 5.5 hrs
  • Hours of Rain: 5.5 hrs

Temperature History - Jul 20

more Historical Weather Data >
  Today Normal Record 7/20/2013
High 78° 83° 95° (2011) 85°
Low 54° 63° 51° (1970) 66°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:37 AM with 14:48 of sunlight, then sets at 8:25 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 12:51 AM with 14:16 of moolight, then sets at 3:07 PM

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Strong thunderstorms will threaten Chicago this weekend before the city gets a taste of September. more >

The 540 Snow Line

Dec 20, 2012; 5:00 AM ET The 540 line is often used by meteorologists to determine the chances of rain vs. snow.