• Today

    Sep 2

    89°Lo 71°

    Fog in the a.m.; partly sunny

    Very Good for lawn mowing
    • Hours of Precip
      0.5
    • Precip
      25%
    • Hi
      RealFeel
      95°
    more
  • Thu

    Sep 3

    84°Lo 67°

    Partly sunny with a t-storm

    Good for lawn mowing
    • Hours of Precip
      1.5
    • Precip
      55%
    • Hi
      RealFeel
      94°
    more
  • Fri

    Sep 4

    83°Lo 67°

    Partly sunny

    Very Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      10%
    • Hi
      RealFeel
      93°
    more
  • Sat

    Sep 5

    84°Lo 69°

    Lots of sun; warm and humid

    Very Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      7%
    • Hi
      RealFeel
      91°
  • Sun

    Sep 6

    86°Lo 70°

    Periods of clouds and sun

    Very Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      10%
    • Hi
      RealFeel
      90°
    more
Next Previous
Hi 84° RealFeel® 91° Precipitation 7%

Day

N

E

S

W

  • SSE 6 mph
  • Gusts: 9 mph

Mostly sunny, very warm and humid

  • Max UV Index: 6 (High)
  • Thunderstorms: 24%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 69° RealFeel® 68° Precipitation 13%

Night

N

E

S

W

  • S 6 mph
  • Gusts: 9 mph

Clear, warm and humid

  • Max UV Index: N/A
  • Thunderstorms: 24%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Sep 5

more Historical Weather Data >
  Today Normal Record 9/5/2014
High 84° 77° N/A 86°
Low 69° 58° N/A 61°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:21 AM with 12:58 of sunlight, then sets at 7:19 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 12:55 PM with 1:12 of moolight, then sets at 2:08 PM

Lake Forest Weather Report

Chicago: More Foggy Mornings in Store as Heat Holds on

September 2, 2015; 5:11 AM ET

Chicagoans can expect to begin September with a stretch of higher temperatures, increasing humidity and more foggy mornings. more >

Why Do Leaves Change Color?

Sep 20, 2011; 5:00 AM ET Why do leaves change from green to beautiful shades of red, orange and yellow in the fall?

Sat. Degree Days

Sat. Evapotranspiration