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Second Lake, KY Weather Forecast
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Second Lake Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  | | | | |  |  |  | |  | |
| Sunny | Clearing | Sunny | Clearing | Mostly Sunny | Partly Cloudy | Chance of T-Storm | Chance of Showers | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Sunny |
| Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C Lo: 59°FLo: 15°C | Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C |
| POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 707 AM CDT Fri Sep 18 2026 
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Issued: 640 AM CDT Fri Sep 18 2026
Key Messages
- A Heat Advisory continues today through Sunday, with high temperatures 15 to 20 degrees above normal in the middle 90s to near 100 degrees.
- There is a 20-30% chance of showers and storms late this afternoon into this evening across mainly southwest Indiana, northwest Kentucky into the Pennyrile region, and portions of southern Illinois along anD north of Route 13.
- A cooling trend will finally begin early next week with the passage of a cold front, with temperatures by mid week near t...