I-55 weather conditions near Arnold, Missouri
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Fog/Mist 62°F 2025-09-21T02:53:00-05:00 
Overnight 2025-09-21, Mostly Cloudy. Mostly cloudy, with a low around 65. Light south wind.Sunday 2025-09-21, Slight Chance Showers and Patchy Fog then Chance T-storms. A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 87. Calm wind becoming southwest 5 to 8 mph in the morning. Chance of precipitation is 30%.
Sunday Night 2025-09-21, T-storms. Showers and thunderstorms, mainly before 1am, then showers and possibly a thunderstorm after 1am. Low around 66. Light and variable wind becoming south around 5 mph. Chance of precipitation is 80%.
Monday 2025-09-22, Showers. Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm. High near 80. South wind 3 to 7 mph. Chance of precipitation is 90%.
Monday Night 2025-09-22, Showers Likely. Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 65. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Tuesday 2025-09-23, Showers Likely. A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.- Tuesday Night 2025-09-23, Showers Likely. A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Wednesday 2025-09-24, 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 78. Chance of precipitation is 60%.
Wednesday Night 2025-09-24, Chance Showers. A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Thursday 2025-09-25, Chance Showers. A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 76. Chance of precipitation is 40%.
Thursday Night 2025-09-25, Chance Showers. A 30 percent chance of showers. Partly cloudy, with a low around 59.
Friday 2025-09-26, Chance Showers. A 30 percent chance of showers. Mostly sunny, with a high near 77.
Friday Night 2025-09-26, Partly Cloudy. Partly cloudy, with a low around 58.
Saturday 2025-09-27, Sunny. Sunny, with a high near 79.