National Weather Service Forecast for: Arnold MO
Issued by: National Weather Service Saint Louis, MO
Updated: 1:52 pm CDT Apr 7, 2025
 
This
Afternoon
This Afternoon: Sunny, with a high near 61. Northwest wind around 11 mph, with gusts as high as 21 mph.
Sunny

 Tonight

Tonight: Widespread frost, mainly after 2am. Otherwise, clear, with a low around 29. North wind 5 to 9 mph becoming calm after midnight.
Clear then
Frost

 Tuesday

Tuesday: Widespread frost, mainly before 9am. Otherwise, sunny, with a high near 56. Calm wind.
Frost then
Sunny

 Tuesday
Night
Tuesday Night: Increasing clouds, with a low around 40. Southeast wind 3 to 8 mph.
Increasing
Clouds

 Wednesday

Wednesday: A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 68. South wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Chance
Showers

 Wednesday
Night
Wednesday Night: A 40 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 46.
Chance
T-storms then
Chance
Showers
 Thursday

Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 69. Chance of precipitation is 50%.
Slight Chance
T-storms then
Chance
Showers
 Thursday
Night
Thursday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 43.
Slight Chance
T-storms

 Friday

Friday: Mostly sunny, with a high near 60.
Mostly Sunny
Hi 61 °F Lo 29 °F Hi 56 °F Lo 40 °F Hi 68 °F Lo 46 °F Hi 69 °F Lo 43 °F Hi 60 °F

Freeze Warning
Hazardous Weather Outlook
 

This Afternoon
 
 Sunny, with a high near 61. Northwest wind around 11 mph, with gusts as high as 21 mph.
Tonight
 
 Widespread frost, mainly after 2am. Otherwise, clear, with a low around 29. North wind 5 to 9 mph becoming calm after midnight.
Tuesday
 
 Widespread frost, mainly before 9am. Otherwise, sunny, with a high near 56. Calm wind.
Tuesday Night
 
 Increasing clouds, with a low around 40. Southeast wind 3 to 8 mph.
Wednesday
 
 A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 68. South wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Wednesday Night
 
 A 40 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 46.
Thursday
 
 A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 69. Chance of precipitation is 50%.
Thursday Night
 
 A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 43.
Friday
 
 Mostly sunny, with a high near 60.
Friday Night
 
 Mostly clear, with a low around 38.
Saturday
 
 Sunny, with a high near 66.
Saturday Night
 
 Mostly clear, with a low around 44.
Sunday
 
 Sunny, with a high near 76.

 

Forecast from NOAA-NWS for Arnold MO.