St. Robert, MO Weather & Growing Conditions
Today
90°F
Sunny
Sunny, with a high near 90. Heat index values as high as 92. South wind 3 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Sunny | 3 to 7 mph S | 0% |
| Tonight | 70°F | Mostly Clear | 7 mph SE | 1% |
| Wednesday | 92°F | Mostly Sunny then Scattered Showers And Thunderstorms | 8 mph S | 25% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms | 7 mph S | 54% |
| Thursday | 90°F | Chance Showers And Thunderstorms | 6 mph S | 54% |
| Thursday Night | 70°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph S | 38% |
| Friday | 89°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 38% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 5 mph S | 31% |
| Saturday | 91°F | Chance Showers And Thunderstorms | 6 mph SW | 28% |
| Saturday Night | 71°F | Mostly Clear | 7 mph S | 10% |
| Sunday | 92°F | Sunny | 9 mph S | 4% |
| Sunday Night | 73°F | Mostly Clear | 7 mph S | 2% |
| Monday | 94°F | Sunny | 9 mph SW | 2% |
| Monday Night | 74°F | Mostly Clear | 8 mph S | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Robert, MO
Last spring frost
Apr 15
First fall frost
Oct 21
Growing season
185 days
Hardiness zone
6b
Explore more for St. Robert, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Waynesville 2 W, Mo (5.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.