7-Day Forecast 38.91°N 90.16°W (Text-Only)
NWS Forecast for: Alton IL
Issued by: National Weather Service Saint Louis, MO
Last Update: 12:22 pm CDT May 14, 2024




This Afternoon: Showers and possibly a thunderstorm. High near 70. Northeast wind around 8 mph. Chance of precipitation is 80%.

Tonight: Showers and thunderstorms likely before midnight, then isolated showers between midnight and 1am. Patchy fog between 10pm and 4am. Otherwise, cloudy, with a low around 58. North wind 7 to 9 mph. Chance of precipitation is 60%.

Wednesday: Mostly cloudy, with a high near 74. North wind 8 to 10 mph.

Wednesday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 59. North wind around 6 mph becoming east after midnight.

Thursday: 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 75. South wind 6 to 13 mph. Chance of precipitation is 60%.

Thursday Night: Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 70%.

Friday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 76. Chance of precipitation is 60%.

Friday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 61.

Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 83.

Saturday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 64.

Sunday: A 20 percent chance of showers and thunderstorms. Sunny, with a high near 84.

Sunday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.

Monday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.



Alton IL
 38.91°N 90.16°W (Elev. 505 ft)

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