Local weather forecast

Weather in Lake Forest, IL

Updated 2026-08-11 12:00 local time · ZIP codes 60045

Light rain
Now73°F

Light rain

High / Low79° / 71°
Rain chance72%
Wind6 mph
Weather alerts

Active alerts

3
Severe Thunderstorm Watch issued August 11 at 7:39AM CDT until August 11 at 2:00PM CDT by NWS Chicago IL

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 563 IN EFFECT UNTIL 2 PM CDT THIS AFTERNOON FOR THE FOLLOWING AREAS THIS WATCH INCLUDES THE FOLLOWING ADJACENT COASTAL WATERS WINTHROP HARBOR TO WILMETTE HARBOR IL WILMETTE HARBOR TO NORTHERLY ISLAND IL NORTHERLY ISLAND TO CALUMET HARBOR IL CALUMET HARBOR IL TO GARY IN GARY TO BURNS HARBOR IN BURNS HARBOR TO MICHIGAN CITY IN LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5NM OFFSHORE TO MID LAKE LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5NM OFFSHORE TO MID LAKE

Special Marine Warning issued August 11 at 10:42AM CDT until August 11 at 12:15PM CDT by NWS Chicago IL

For the following areas... Nearshore Waters from Winthrop Harbor to Calumet Harbor... Nearshore Waters from Calumet Harbor to Michigan City... Open Waters from Winthrop Harbor to Michigan City out to Mid Lake... At 1041 AM CDT, severe thunderstorms capable of producing waterspouts were located along a line extending from 9 nm northeast of Elgin to 9 nm southwest of Midway Airport to 7 nm southeast of Joliet, moving east at 50 knots. HAZARD...Waterspouts and wind gusts in excess of 65 knots. SOURCE...Radar indicated. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Boats could suffer significant structural damage in high winds. Small craft could capsize in suddenly higher waves. In addition, rapid large fluctuations in water levels are possible as and after these storms pass. severe thunderstorms will be near... Montrose Harbor, Wilmette Harbor, Monroe Harbor, 31st Street Harbor, Calumet Harbor, Harrison-Dever Crib, Burnham Harbor, Belmont Harbor, Jackson Park Harbor, and Diversy Harbor around 1100 AM CDT. Indiana Harbor around 1105 AM CDT. Burns Harbor and Marina Shores at Dune Harbor around 1120 AM CDT. Michigan City around 1130 AM CDT.

Special Marine Warning issued August 11 at 10:09AM CDT until August 11 at 12:15PM CDT by NWS Chicago IL

SMWLOT The National Weather Service in Chicago has issued a * Special Marine Warning for... Nearshore Waters from Winthrop Harbor to Calumet Harbor... Nearshore Waters from Calumet Harbor to Michigan City... Open Waters from Winthrop Harbor to Michigan City out to Mid Lake... * Until 1215 PM CDT. * At 1009 AM CDT, severe thunderstorms were located along a line extending from 11 nm southwest of McHenry to 12 nm southwest of Aurora, moving east at 40 knots. HAZARD...Wind gusts in excess of 50 knots. SOURCE...Radar. IMPACT...Boats could suffer significant structural damage in high winds. Small craft could capsize in suddenly higher waves. * Severe thunderstorms will be near... Montrose Harbor, Wilmette Harbor, Belmont Harbor, and Diversy Harbor around 1100 AM CDT. Monroe Harbor, 31st Street Harbor, Harrison-Dever Crib, Burnham Harbor, Jackson Park Harbor, 59th Street Marina, and DuSable Harbor around 1105 AM CDT. Calumet Harbor and Hammond Marina around 1110 AM CDT. Indiana Harbor around 1115 AM CDT. Marina Shores at Dune Harbor around 1130 AM CDT. Burns Harbor around 1135 AM CDT. Michigan City around 1150 AM CDT.

Hourly

Next hours

NowLight rain73°49% rain
1 PMPatchy rain nearby72°45% rain
2 PMPatchy rain nearby73°17% rain
3 PMSunny77°9% rain
4 PMSunny75°12% rain
5 PMPatchy rain nearby75°27% rain
6 PMSunny76°10% rain
7 PMSunny79°11% rain
8 PMClear73°11% rain
9 PMClear72°13% rain
10 PMClear72°14% rain
11 PMClear72°16% rain
Forecast

3-day weather forecast

Today2026-08-11
Sunny
79° 71°Sunny
Rain 72%Gust 8 mph
Tomorrow2026-08-12
Sunny
79° 70°Sunny
Rain 79%Gust 11 mph
Thursday2026-08-13
Sunny
79° 70°Sunny
Rain 9%Gust 10 mph
Conditions

Weather details

Feels like78°F
Humidity94%
Pressure29.94 inHg
Visibility10 mi
Wind6 mph NE
Wind gusts10 mph
Precipitation0.01 in
UV index5
Daylight

Sunrise, sunset and moon

Sunrise05:54 AM
Sunset07:58 PM
Moonrise03:52 AM
Moon phaseNew Moon
Practical guide

Weather insights for today

Take an umbrella

Rain chance reaches about 49% over the next 12 hours.

Light layers should work

It feels like 78°F with winds near 6 mph.

Best window: 8 PM

73°F, 11% rain chance and 2 mph wind.

Allow a little extra driving time

Visibility is around 10 mi; gusts may reach 10 mph.

Run with a few weather adjustments

Current temperature is 73°F, wind 6 mph, rain chance up to 49%.

Moderate UV protection recommended

UV index is 5. Sunscreen and sunglasses are sensible for longer outdoor time.

Lake Forest weather today

Light rain and 73°F in Lake Forest, IL. Today's high is 79°F with a 72% rain chance. Winds are around 6 mph with gusts near 10 mph. Relative humidity is 94%, pressure is 29.94 inHg, and visibility is about 10 miles.

Tonight and tomorrow in Lake Forest

Sunrise is at 05:54 AM and sunset is at 07:58 PM. Tomorrow's forecast calls for Sunny with a high near 79°F and a low near 70°F. The maximum rain chance is 79%.

Nearby

Weather near Lake Forest

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