| NWS Forecast for: Collinsville IL Issued by: National Weather Service Saint Louis, MO Last Update: 8:37 pm CDT Jul 12, 2025 | |
Tonight: Partly cloudy, with a low around 72. Calm wind. Sunday: A 50 percent chance of showers and thunderstorms, mainly after noon. Mostly cloudy, with a high near 87. Light and variable wind. Sunday Night: Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 71. Light southwest wind. Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. Calm wind becoming south around 6 mph in the afternoon. Monday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73. Southeast wind around 5 mph becoming calm in the evening. Tuesday: A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89. Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 74. Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 93. Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 74. Thursday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 92. Thursday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Friday: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 88. Friday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71. Saturday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. | |
| Collinsville IL 38.68°N 90°W (Elev. 499 ft) | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |