I-57 weather conditions near Johnston City, Illinois
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Fair 68°F 2025-10-18T00:15:00-05:00 
Overnight 2025-10-18, Mostly Clear. Mostly clear, with a low around 64. South wind around 7 mph.Saturday 2025-10-18, Slight Chance T-storms then Showers Likely. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Increasing clouds, with a high near 82. South wind 8 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Saturday Night 2025-10-18, Showers. Showers and possibly a thunderstorm before 2am, then showers likely. Low around 51. South southwest wind 10 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 100%.Sunday 2025-10-19, Breezy. Chance Showers then Sunny. A 30 percent chance of showers, mainly before 7am. Mostly cloudy through mid morning, then gradual clearing, with a high near 64. Breezy, with a west northwest wind 17 to 21 mph, with gusts as high as 31 mph.
Sunday Night 2025-10-19, Clear. Clear, with a low around 41. West wind 5 to 7 mph becoming calm in the evening.
Monday 2025-10-20, Sunny. Sunny, with a high near 72. South wind 5 to 10 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 26 mph.- Monday Night 2025-10-20, Mostly Clear. Mostly clear, with a low around 50. South southwest wind 9 to 14 mph becoming west after midnight. Winds could gust as high as 22 mph.
Tuesday 2025-10-21, Sunny. Sunny, with a high near 66. West northwest wind 10 to 15 mph, with gusts as high as 23 mph.- Tuesday Night 2025-10-21, Mostly Clear. Mostly clear, with a low around 40. West northwest wind 3 to 8 mph.
- Wednesday 2025-10-22, Sunny. Sunny, with a high near 66. West northwest wind 3 to 7 mph.
Wednesday Night 2025-10-22, Mostly Clear then Slight Chance Showers. A slight chance of showers. Partly cloudy, with a low around 44. South wind 3 to 6 mph.
Thursday 2025-10-23, Chance Showers. A chance of showers. Partly sunny, with a high near 68. South southwest wind 6 to 10 mph.
Thursday Night 2025-10-23, Chance Showers. A chance of showers. Partly cloudy, with a low around 45. South southwest wind 3 to 6 mph.
Friday 2025-10-24, Slight Chance Showers. A slight chance of showers. Mostly sunny, with a high near 67. North northwest wind 5 to 8 mph.