I-55 weather conditions near Arnold, Missouri

Roadnow AI Agent Live Update

7 day weather forecast

• Current condition: Overcast 56°F 2025-11-18T00:53:00-06:00
• Overnight 2025-11-18, Chance T-storms. A 40 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 53. South wind around 7 mph.
• Tuesday 2025-11-18, Chance T-storms then Partly Sunny. A 30 percent chance of rain and thunderstorms, mainly before 7am. Mostly cloudy, with a high near 73. South wind around 7 mph becoming northwest in the afternoon.
• Tuesday Night 2025-11-18, Mostly Cloudy. Mostly cloudy, with a low around 43. North wind 3 to 5 mph.
• Wednesday 2025-11-19, Mostly Cloudy. Mostly cloudy, with a high near 63. Calm wind.
• Wednesday Night 2025-11-19, Mostly Cloudy then Chance Rain. A 50 percent chance of rain after midnight. Mostly cloudy, with a low around 49. Light and variable wind.
• Thursday 2025-11-20, Rain. Rain, with thunderstorms also possible after 9am. High near 66. Chance of precipitation is 90%.
• Thursday Night 2025-11-20, Rain. Rain and possibly a thunderstorm. Low around 54. Chance of precipitation is 80%.
• Friday 2025-11-21, Rain Likely. Rain likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 63. Chance of precipitation is 70%.
• Friday Night 2025-11-21, Chance Rain then Mostly Cloudy. A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 43.
• Saturday 2025-11-22, Mostly Sunny. Mostly sunny, with a high near 57.
• Saturday Night 2025-11-22, Partly Cloudy. Partly cloudy, with a low around 40.
• Sunday 2025-11-23, Mostly Sunny. Mostly sunny, with a high near 61.
• Sunday Night 2025-11-23, Partly Cloudy then Slight Chance Rain. A 20 percent chance of rain. Partly cloudy, with a low around 42.
• Monday 2025-11-24, Chance Rain. A 30 percent chance of rain. Partly sunny, with a high near 60.