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: Fair 81°F 2025-09-21T16:53:00-05:00 
This Afternoon 2025-09-21, Showers Likely. Showers likely and possibly a thunderstorm. Cloudy, with a steady temperature around 78. Southwest wind around 6 mph. Chance of precipitation is 60%.
Tonight 2025-09-21, Showers. Showers and thunderstorms before 9pm, then showers and possibly a thunderstorm, mainly after 9pm. Low around 65. Southwest wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 80%.Monday 2025-09-22, Showers then Chance T-storms. Showers and possibly a thunderstorm before 10am, then a chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 79. Southwest wind around 7 mph. Chance of precipitation is 80%.
Monday Night 2025-09-22, Scattered T-storms then Chance Showers. Scattered showers and thunderstorms before 4am, then a slight chance of showers. Partly cloudy, with a low around 64. Light southwest wind. Chance of precipitation is 50%.
- 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. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%.
Tuesday Night 2025-09-23, Showers Likely. Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Chance of precipitation is 70%.
Wednesday 2025-09-24, Showers. Showers likely, then showers and possibly a thunderstorm after 1pm. High near 77. Chance of precipitation is 80%.
Wednesday Night 2025-09-24, Chance Showers. A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Thursday 2025-09-25, Chance Showers. A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 75. Chance of precipitation is 50%.
Thursday Night 2025-09-25, Slight Chance Showers. A 20 percent chance of showers. Partly cloudy, with a low around 57.
Friday 2025-09-26, Slight Chance Showers. A 20 percent chance of showers. Mostly sunny, with a high near 77.
Friday Night 2025-09-26, Mostly Clear. Mostly clear, with a low around 55.
Saturday 2025-09-27, Sunny. Sunny, with a high near 80.- Saturday Night 2025-09-27, Mostly Clear. Mostly clear, with a low around 56.
- Sunday 2025-09-28, Mostly Sunny. Mostly sunny, with a high near 81.