Current Conditions
Lake Forest, Illinois
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
| Day | 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. | |||||||
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About This Forecast
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Coordinates: 42.2586°N, 87.8406°W·Elevation: 210m·Timezone: America/Chicago·Population: 19,408