St. Robert, MO Weather & Growing Conditions
Tonight
50°F
Slight Chance Drizzle
A slight chance of drizzle before 5am. Mostly cloudy. Low around 50, with temperatures rising to around 52 overnight. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Slight Chance Drizzle | 10 mph W | 16% |
| Wednesday | 63°F | Mostly Cloudy | 8 to 13 mph W | 5% |
| Wednesday Night | 39°F | Mostly Clear | 6 mph SW | 0% |
| Thursday | 66°F | Sunny | 6 to 10 mph W | 0% |
| Thursday Night | 42°F | Mostly Cloudy | 3 to 7 mph NW | 2% |
| Friday | 58°F | Partly Sunny | 7 to 10 mph N | 1% |
| Friday Night | 34°F | Partly Cloudy | 1 to 7 mph N | 0% |
| Saturday | 57°F | Mostly Sunny | 1 to 5 mph N | 0% |
| Saturday Night | 33°F | Partly Cloudy | 2 mph NW | 1% |
| Sunday | 63°F | Sunny | 1 to 6 mph NW | 0% |
| Sunday Night | 34°F | Clear | 2 mph W | 1% |
| Monday | 69°F | Sunny | 2 to 7 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph SW | 0% |
| Tuesday | 72°F | Sunny | 6 mph W | 2% |
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 Nov 4, 2026.