| NWS Forecast for: Cahokia / St. Louis, St. Louis Downtown Airport IL Issued by: National Weather Service Saint Louis, MO Last Update: 10:21 pm CDT Oct 8, 2026 | |
| Overnight: Patchy fog after 2am. Otherwise, clear, with a low around 52. Calm wind. Friday: Patchy fog before 8am. Otherwise, sunny, with a high near 90. South wind 5 to 10 mph. Friday Night: Increasing clouds, with a low around 57. Southeast wind 3 to 7 mph. Saturday: Increasing clouds, with a high near 83. Light southeast wind increasing to 5 to 10 mph in the morning. Saturday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 58. East wind 6 to 9 mph. Sunday: Partly sunny, with a high near 79. Sunday Night: Mostly clear, with a low around 58. Columbus Day: Sunny, with a high near 92. Monday Night: Mostly clear, with a low around 66. Tuesday: Sunny, with a high near 86. Tuesday Night: A 20 percent chance of showers. Partly cloudy, with a low around 60. Wednesday: A 20 percent chance of showers. Mostly sunny, with a high near 82. Wednesday Night: A 30 percent chance of showers. Partly cloudy, with a low around 61. Thursday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83. | |
| Cahokia / St. Louis, St. Louis Downtown Airport IL 38.57°N 90.15°W (Elev. 407 ft) | |
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