| 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 22. Calm wind. Sunday: A 50 percent chance of showers and thunderstorms, mainly after noon. Mostly cloudy, with a high near 31. Calm wind. Sunday Night: Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 22. Calm wind. Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 32. Calm wind becoming south 5 to 10 km/h in the morning. Monday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 23. Southeast wind 3 to 8 km/h. Tuesday: A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 32. Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 23. Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 34. Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 23. Thursday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 33. Thursday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22. Friday: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 31. Friday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 22. Saturday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 32. | |
| Collinsville IL 38.68°N 90°W (Elev. 499 m) | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |