Current Conditions

Lake Forest, Illinois

86°F30°C
Hot

Feels like93°F34°C

Wind

SW 9 mph14 km/h

Humidity

66%

Cloud Cover

49%

As of Wednesday, September 2, 2026 at 12:39 PM CDT

Today's Outlook

Day

Mostly cloudy and hot, with a high of 88°F31°C and morning low of 78°F26°C — feels like 97°F36°C. Breezy from the SW at 8 to 9 mph13 to 14 km/h. Heat risk in the afternoon.

Night

Mostly clear, with a low around 82°F28°C. Light wind from the SW around 6 mph10 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
HotHigh 88°F31°CFeels 97°F36°CLow 78°F26°CPrecip 0.01 in0.3 mm9%Cloud 45%Wind SW 7 mph12 km/hWednesday: Mostly cloudy and hot, with a high of 88°F31°C and morning low of 78°F26°C — feels like 97°F36°C. Breezy from the SW at 8 to 9 mph13 to 14 km/h. Heat risk in the afternoon. Wednesday Night: Mostly clear, with a low around 82°F28°C. Light wind from the SW around 6 mph10 km/h.
DrizzleHigh 83°F28°CFeels 89°F32°CLow 79°F26°CPrecip 0.04 in1 mm12%Cloud 44%Wind S 7 mph12 km/hThursday: Mostly cloudy and warm, with a high of 83°F28°C — feels like 90°F32°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h. 12% chance of drizzle throughout the day. Heavy, humid air. Thursday Night: Partly cloudy, with a low around 79°F26°C. Breezy from the SSE at 7 to 8 mph11 to 12 km/h. 11% chance of drizzle before dawn.
ShowersHigh 83°F28°CFeels 89°F32°CLow 77°F25°CPrecip 0.16 in4 mm37%Cloud 65%Wind E 8 mph13 km/hFriday: Mostly cloudy and warm, with a high of 83°F28°C and morning low of 77°F25°C — feels like 90°F32°C. Breezy from the ESE at 8 to 9 mph13 to 14 km/h. 30% chance of light rain throughout the day. Heavy, humid air. Friday Night: Mostly cloudy, with a low around 77°F25°C. Breezy from the E at 8 to 10 mph14 to 16 km/h. 37% chance of showers throughout the night.
ShowersHigh 78°F26°CLow 75°F24°CPrecip 0.13 in3.3 mm33%Cloud 53%Wind ENE 8 mph13 km/hSaturday: Mostly cloudy and warm, with a high of 78°F26°C. Breezy from the ENE at 8 to 10 mph13 to 16 km/h. 29% chance of showers throughout the day. Heavy, humid air. Saturday Night: Mostly cloudy, with a low around 75°F24°C. Breezy from the ENE at 9 to 10 mph14 to 16 km/h. 33% chance of showers overnight.
DrizzleHigh 77°F25°CLow 73°F23°CPrecip 0.05 in1.3 mm16%Cloud 57%Wind ESE 8 mph13 km/hSunday: Mostly cloudy and warm, with a high of 77°F25°C. Breezy from the ESE at 8 to 9 mph13 to 14 km/h. 16% chance of drizzle throughout the day. Humid. Sunday Night: Mostly cloudy, with a low around 74°F23°C. Breezy from the E at 8 mph13 km/h.
Partly CloudyHigh 77°F25°CLow 72°F22°CPrecip 0.01 in0.2 mm5%Cloud 57%Wind SE 9 mph14 km/hMonday: Mostly cloudy and warm, with a high of 77°F25°C and morning low of 72°F22°C. Breezy from the SE at 9 mph14 km/h. Monday Night: Mostly cloudy, with a low around 73°F23°C. Breezy from the SE at 9 to 10 mph15 to 17 km/h.
Partly CloudyHigh 82°F28°CFeels 85°F29°CLow 72°F22°CPrecip 0.01 in0.3 mm5%Cloud 61%Wind S 12 mph20 km/hTuesday: Mostly cloudy and warm, with a high of 82°F28°C and morning low of 72°F22°C. Breezy from the S at 12 to 13 mph19 to 21 km/h. Humid. Tuesday Night: Mostly cloudy, with a low around 73°F23°C. Breezy from the S at 13 to 14 mph20 to 23 km/h.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
WednesdaySep 288°F31°C
Feels 97°F36°C
78°F26°C0.01 in0.3 mm· 9%45%HotSW 7 mph12 km/h
ThursdaySep 383°F28°C
Feels 89°F32°C
79°F26°C0.04 in1 mm· 12%44%DrizzleS 7 mph12 km/h
FridaySep 483°F28°C
Feels 89°F32°C
77°F25°C0.16 in4 mm· 37%65%ShowersE 8 mph13 km/h
SaturdaySep 578°F26°C75°F24°C0.13 in3.3 mm· 33%53%ShowersENE 8 mph13 km/h
SundaySep 677°F25°C73°F23°C0.05 in1.3 mm· 16%57%DrizzleESE 8 mph13 km/h
MondaySep 777°F25°C72°F22°C0.01 in0.2 mm· 5%57%Partly CloudySE 9 mph14 km/h
TuesdaySep 882°F28°C
Feels 85°F29°C
72°F22°C0.01 in0.3 mm· 5%61%Partly CloudyS 12 mph20 km/h
WednesdaySep 985°F30°C
Feels 91°F33°C
77°F25°C0.02 in0.5 mm· 8%36%ClearSW 13 mph20 km/h
ThursdaySep 1081°F27°C75°F24°C0.16 in4 mm· 25%50%ShowersSW 11 mph17 km/h
FridaySep 1180°F27°C73°F23°C0.18 in4.6 mm· 27%59%ShowersSSW 11 mph18 km/h
SaturdaySep 1277°F25°C72°F22°C0.23 in5.9 mm· 26%63%ShowersSSW 12 mph19 km/h
SundaySep 1376°F24°C70°F21°C0.17 in4.2 mm· 21%57%ShowersSW 12 mph19 km/h
MondaySep 1474°F23°C68°F20°C0.18 in4.5 mm· 25%55%ShowersSSW 11 mph18 km/h
TuesdaySep 1574°F23°C67°F20°C0.12 in3 mm· 17%49%DrizzleS 11 mph18 km/h
WednesdaySep 1674°F23°C67°F19°C0.14 in3.5 mm· 19%49%ShowersSSW 11 mph18 km/h

Nearby Cities

About This Forecast

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Coordinates: 42.2586°N, 87.8406°W·Elevation: 210m·Timezone: America/Chicago·Population: 19,408