Current Conditions

Lake Forest, Illinois

82°F28°C

Hot

Feels like87°F30°C

Wind

SW 7 mph11 km/h

Humidity

73%

Cloud Cover

61%

As of Wednesday, September 2, 2026 at 8:50 AM 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. Breezy from the SSW at 6 to 7 mph10 to 11 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Hot	High 88°F31°CFeels 97°F36°C	Low 78°F26°C	Precip 0.01 in0.2 mm8%	Cloud 43%	Wind SW 7 mph12 km/h	Wednesday: 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. Breezy from the SSW at 6 to 7 mph10 to 11 km/h.
Drizzle	High 83°F29°CFeels 90°F32°C	Low 79°F26°C	Precip 0.04 in0.9 mm16%	Cloud 43%	Wind S 7 mph12 km/h	Thursday: Mostly cloudy and warm, with a high of 83°F29°C and morning low of 79°F26°C — feels like 90°F32°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h. 16% chance of drizzle throughout the day. Heavy, humid air. Thursday Night: Partly cloudy, with a low around 80°F26°C. Breezy from the SSE at 7 to 8 mph12 to 12 km/h. 11% chance of drizzle before dawn.
Showers	High 83°F28°CFeels 90°F32°C	Low 77°F25°C	Precip 0.15 in3.7 mm32%	Cloud 61%	Wind E 8 mph13 km/h	Friday: 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. 31% chance of light rain throughout the day. Heavy, humid air. Friday Night: Mostly cloudy, with a low around 78°F25°C. Breezy from the E at 8 to 9 mph13 to 15 km/h. 32% chance of showers throughout the night.
Showers	High 78°F26°C	Low 75°F24°C	Precip 0.15 in3.9 mm35%	Cloud 56%	Wind ENE 8 mph14 km/h	Saturday: Mostly cloudy and warm, with a high of 78°F26°C. Breezy from the ENE at 8 to 10 mph13 to 16 km/h. 28% 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. 35% chance of showers overnight.
Drizzle	High 77°F25°C	Low 73°F23°C	Precip 0.04 in0.9 mm12%	Cloud 54%	Wind ESE 8 mph14 km/h	Sunday: Mostly cloudy and warm, with a high of 77°F25°C. Breezy from the ESE at 8 to 9 mph14 to 15 km/h. 12% chance of drizzle in the morning. Humid. Sunday Night: Mostly cloudy, with a low around 74°F23°C. Breezy from the E at 8 to 9 mph13 to 14 km/h.
Partly Cloudy	High 77°F25°C	Low 71°F22°C	Precip 0.03 in0.8 mm6%	Cloud 64%	Wind SE 8 mph14 km/h	Monday: Mostly cloudy and warm, with a high of 77°F25°C and morning low of 71°F22°C. Breezy from the SE at 8 to 9 mph13 to 15 km/h. Monday Night: Mostly cloudy, with a low around 73°F23°C. Breezy from the ESE at 9 mph14 km/h.
Drizzle	High 80°F27°C	Low 72°F22°C	Precip 0.06 in1.5 mm14%	Cloud 68%	Wind SSE 11 mph18 km/h	Tuesday: Mostly cloudy and warm, with a high of 80°F27°C and morning low of 72°F22°C. Breezy from the SSE at 11 to 12 mph18 to 20 km/h. 14% chance of drizzle throughout the day. Humid. Tuesday Night: Mostly cloudy, with a low around 73°F23°C. Breezy from the SSE at 12 to 13 mph19 to 21 km/h. 10% chance of drizzle throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 2	88°F31°C Feels 97°F36°C	78°F26°C	0.01 in0.2 mm· 8%	43%	Hot	SW 7 mph12 km/h
DayMostly 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. NightMostly clear, with a low around 82°F28°C. Breezy from the SSW at 6 to 7 mph10 to 11 km/h.
	ThursdaySep 3	83°F29°C Feels 90°F32°C	79°F26°C	0.04 in0.9 mm· 16%	43%	Drizzle	S 7 mph12 km/h
DayMostly cloudy and warm, with a high of 83°F29°C and morning low of 79°F26°C — feels like 90°F32°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h. 16% chance of drizzle throughout the day. Heavy, humid air. NightPartly cloudy, with a low around 80°F26°C. Breezy from the SSE at 7 to 8 mph12 to 12 km/h. 11% chance of drizzle before dawn.
	FridaySep 4	83°F28°C Feels 90°F32°C	77°F25°C	0.15 in3.7 mm· 32%	61%	Showers	E 8 mph13 km/h
DayMostly 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. 31% chance of light rain throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 78°F25°C. Breezy from the E at 8 to 9 mph13 to 15 km/h. 32% chance of showers throughout the night.
	SaturdaySep 5	78°F26°C	75°F24°C	0.15 in3.9 mm· 35%	56%	Showers	ENE 8 mph14 km/h
DayMostly cloudy and warm, with a high of 78°F26°C. Breezy from the ENE at 8 to 10 mph13 to 16 km/h. 28% chance of showers throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 75°F24°C. Breezy from the ENE at 9 to 10 mph14 to 16 km/h. 35% chance of showers overnight.
	SundaySep 6	77°F25°C	73°F23°C	0.04 in0.9 mm· 12%	54%	Drizzle	ESE 8 mph14 km/h
DayMostly cloudy and warm, with a high of 77°F25°C. Breezy from the ESE at 8 to 9 mph14 to 15 km/h. 12% chance of drizzle in the morning. Humid. NightMostly cloudy, with a low around 74°F23°C. Breezy from the E at 8 to 9 mph13 to 14 km/h.
	MondaySep 7	77°F25°C	71°F22°C	0.03 in0.8 mm· 6%	64%	Partly Cloudy	SE 8 mph14 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 71°F22°C. Breezy from the SE at 8 to 9 mph13 to 15 km/h. NightMostly cloudy, with a low around 73°F23°C. Breezy from the ESE at 9 mph14 km/h.
	TuesdaySep 8	80°F27°C	72°F22°C	0.06 in1.5 mm· 14%	68%	Drizzle	SSE 11 mph18 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 72°F22°C. Breezy from the SSE at 11 to 12 mph18 to 20 km/h. 14% chance of drizzle throughout the day. Humid. NightMostly cloudy, with a low around 73°F23°C. Breezy from the SSE at 12 to 13 mph19 to 21 km/h. 10% chance of drizzle throughout the night.
	WednesdaySep 9	85°F30°C Feels 91°F33°C	76°F24°C	0.09 in2.4 mm· 15%	41%	Showers	SW 12 mph20 km/h
DayPartly cloudy and warm, with a high of 85°F30°C and morning low of 76°F24°C — feels like 91°F33°C. Breezy from the SW at 12 to 13 mph19 to 20 km/h. 15% chance of showers in the morning. Heavy, humid air. NightPartly cloudy, with a low around 77°F25°C. Breezy from the SSW at 13 to 14 mph20 to 23 km/h. 14% chance of showers throughout the night.
	ThursdaySep 10	80°F27°C	75°F24°C	0.17 in4.3 mm· 23%	56%	Showers	WSW 11 mph17 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 75°F24°C. Breezy from the WSW at 10 to 11 mph17 to 18 km/h. 23% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 76°F24°C. Breezy from the SW at 11 to 13 mph18 to 20 km/h. 20% chance of showers throughout the night.
	FridaySep 11	78°F25°C	72°F22°C	0.24 in6 mm· 24%	60%	Showers	SSW 11 mph18 km/h
DayMostly cloudy and warm, with a high of 78°F25°C and morning low of 72°F22°C. Breezy from the SSW at 11 mph18 km/h. 24% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 73°F23°C. Breezy from the SSW at 11 to 12 mph18 to 19 km/h. 22% chance of showers throughout the night.
	SaturdaySep 12	76°F24°C	70°F21°C	0.22 in5.6 mm· 25%	62%	Showers	SW 12 mph19 km/h
DayMostly cloudy and warm, with a high of 76°F24°C and morning low of 70°F21°C. Breezy from the SW at 12 mph19 km/h. 25% chance of showers throughout the day. NightMostly cloudy, with a low around 71°F22°C. Breezy from the SW at 12 mph19 km/h. 23% chance of showers throughout the night.
	SundaySep 13	74°F23°C	68°F20°C	0.16 in4 mm· 22%	58%	Showers	W 12 mph19 km/h
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 68°F20°C. Breezy from the W at 11 to 12 mph18 to 19 km/h. 22% chance of showers throughout the day. NightMostly cloudy, with a low around 69°F21°C. Breezy from the W at 12 to 13 mph19 to 20 km/h. 20% chance of showers throughout the night.
	MondaySep 14	72°F22°C	67°F19°C	0.2 in5 mm· 25%	60%	Showers	SSW 11 mph18 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 67°F19°C. Breezy from the SW at 11 to 12 mph18 to 19 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 68°F20°C. Breezy from the SSW at 11 to 12 mph18 to 19 km/h. 25% chance of showers throughout the night.
	TuesdaySep 15	72°F22°C	66°F19°C	0.12 in3.1 mm· 15%	50%	Showers	SW 11 mph17 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 66°F19°C. Breezy from the WSW at 11 mph17 km/h. 15% chance of showers throughout the day. NightPartly cloudy, with a low around 67°F19°C. Breezy from the SW at 11 mph17 km/h. 14% chance of drizzle throughout the night.
	WednesdaySep 16	72°F22°C	65°F18°C	0.11 in2.8 mm· 17%	45%	Showers	SSW 11 mph18 km/h
DayPartly cloudy and warm, with a high of 72°F22°C and morning low of 65°F18°C. Breezy from the SW at 11 to 12 mph18 to 19 km/h. 17% chance of drizzle throughout the day. NightPartly cloudy, with a low around 66°F19°C. Breezy from the SSW at 11 to 12 mph18 to 19 km/h. 16% chance of showers throughout the night.

Nearby Cities

North Chicago5 mi7 km Highland Park6 mi9 km Libertyville6 mi10 km Deerfield6 mi10 km Waukegan7 mi12 km Vernon Hills8 mi12 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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