I-55 weather conditions near Saint Louis, Missouri
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Mostly Cloudy 79°F 2025-09-20T12:51:00-05:00 
This Afternoon 2025-09-20, Slight Chance T-storms. A 20 percent chance of showers and thunderstorms. Increasing clouds, with a high near 88. South wind around 6 mph.Tonight 2025-09-20, Slight Chance T-storms then Chance T-storms. A 50 percent chance of showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 68. Southeast wind 3 to 6 mph.
Sunday 2025-09-21, Chance Showers then Chance T-storms. A 40 percent chance of showers and thunderstorms, mainly after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 85. Southwest wind 5 to 10 mph.
Sunday Night 2025-09-21, Showers Likely. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 67. South wind around 6 mph. Chance of precipitation is 60%.Monday 2025-09-22, Showers Likely then T-storms Likely. Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Mostly cloudy, with a high near 82. South wind 5 to 8 mph. Chance of precipitation is 60%.
Monday Night 2025-09-22, Chance T-storms. A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.Tuesday 2025-09-23, Chance T-storms then Showers Likely. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
- Tuesday Night 2025-09-23, Showers Likely. Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Wednesday 2025-09-24, Showers Likely. A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 76. Chance of precipitation is 60%.
Wednesday Night 2025-09-24, Chance T-storms. A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Thursday 2025-09-25, Chance Showers. A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 73.
Thursday Night 2025-09-25, Chance Showers. A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Friday 2025-09-26, Chance Showers. A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 75.