| NWS Forecast for: Pontoon Beach IL Issued by: National Weather Service Saint Louis, MO Last Update: 9:51 am CDT Apr 14, 2026 | |
Today: Mostly sunny, with a high near 31. South wind 16 to 21 km/h increasing to 22 to 27 km/h in the afternoon. Winds could gust as high as 39 km/h. Tonight: A 30 percent chance of showers and thunderstorms, mainly after 4am. Increasing clouds, with a low around 21. South wind 16 to 24 km/h, with gusts as high as 37 km/h. Wednesday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 28. South wind 14 to 23 km/h, with gusts as high as 35 km/h. Chance of precipitation is 70%. Wednesday Night: Showers and possibly a thunderstorm. Low around 18. Southwest wind 13 to 16 km/h. Chance of precipitation is 80%. Thursday: Showers likely, with thunderstorms also possible after 1pm. Partly sunny, with a high near 27. Southwest wind 13 to 18 km/h. Chance of precipitation is 70%. Thursday Night: Mostly clear, with a low around 15. Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 30. Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 16. Chance of precipitation is 70%. Saturday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 22. Chance of precipitation is 50%. Saturday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 6. Sunday: Sunny, with a high near 18. Sunday Night: Mostly clear, with a low around 6. Monday: Sunny, with a high near 21. | |
| Pontoon Beach IL 38.73°N 90.06°W (Elev. 423 m) | |
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