| NWS Forecast for: Sullivan IL Issued by: National Weather Service Lincoln, IL Last Update: 3:11 am CDT Jul 15, 2025 | |
| Overnight: Mostly cloudy, with a low around 21. Calm wind. Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 29. Light and variable wind becoming south southeast 6 to 11 km/h in the morning. Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 22. South wind 5 to 8 km/h. Wednesday: Mostly sunny, with a high near 32. Southwest wind 5 to 10 km/h. Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 22. South southwest wind around 8 km/h. Chance of precipitation is 30%. Thursday: Showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 29. West southwest wind around 11 km/h. Chance of precipitation is 60%. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms. Thursday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 19. North northwest wind 5 to 8 km/h becoming northeast after midnight. Chance of precipitation is 40%. Friday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 28. Friday Night: Mostly cloudy, with a low around 20. Saturday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 30. Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 22. Sunday: A chance of showers and thunderstorms. Partly sunny, with a high near 31. Sunday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 21. Monday: A chance of showers and thunderstorms. Mostly sunny, with a high near 31. | |
| Sullivan IL 39.59°N 88.61°W (Elev. 669 m) | |
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