| NWS Forecast for: Pontoon Beach IL Issued by: National Weather Service Saint Louis, MO Last Update: 5:36 pm CDT Mar 11, 2026 | |
| Tonight: Mostly cloudy, then gradually becoming clear, with a low around 32. Northwest wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 26 mph. Thursday: Sunny, with a high near 55. Light west wind becoming southwest 5 to 10 mph in the morning. Thursday Night: Partly cloudy, with a low around 44. South wind 11 to 18 mph, with gusts as high as 31 mph. Friday: Partly sunny, with a high near 61. Northwest wind 13 to 15 mph, with gusts as high as 24 mph. Friday Night: Mostly cloudy, with a low around 36. Northwest wind 5 to 7 mph becoming northeast after midnight. Saturday: Partly sunny, with a high near 62. Saturday Night: Mostly cloudy, with a low around 50. Sunday: Rain likely and possibly a thunderstorm, then rain after 1pm. High near 67. Breezy. Chance of precipitation is 80%. Sunday Night: A chance of rain and snow before 1am. Mostly cloudy, with a low around 25. Blustery. Chance of precipitation is 30%. Monday: Partly sunny, with a high near 36. Breezy. Monday Night: Mostly clear, with a low around 18. Tuesday: Mostly sunny, with a high near 42. Tuesday Night: A slight chance of rain and snow. Mostly cloudy, with a low around 33. Chance of precipitation is 20%. Wednesday: Partly sunny, with a high near 56. | |
| Pontoon Beach IL 38.73°N 90.06°W (Elev. 423 ft) | |
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