Marthasville, MO Weather & Growing Conditions
Tonight
51°F
Mostly Cloudy then Slight Chance Drizzle
A slight chance of drizzle between midnight and 4am. Mostly cloudy, with a low around 51. Southwest wind around 10 mph, with gusts as high as 23 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Mostly Cloudy then Slight Chance Drizzle | 10 mph SW | 14% |
| Wednesday | 62°F | Mostly Cloudy | 5 to 12 mph W | 2% |
| Wednesday Night | 39°F | Mostly Clear | 2 mph W | 0% |
| Thursday | 63°F | Sunny | 2 to 7 mph W | 5% |
| Thursday Night | 38°F | Mostly Cloudy | 1 mph NW | 12% |
| Friday | 57°F | Mostly Cloudy | 1 to 5 mph NW | 4% |
| Friday Night | 34°F | Partly Cloudy | 1 mph N | 2% |
| Saturday | 57°F | Partly Sunny | 0 mph | 0% |
| Saturday Night | 31°F | Partly Cloudy | 0 mph | 3% |
| Sunday | 62°F | Sunny | 2 mph NW | 8% |
| Sunday Night | 32°F | Mostly Clear | 1 mph N | 3% |
| Monday | 67°F | Sunny | 0 to 3 mph W | 2% |
| Monday Night | 36°F | Mostly Clear | 0 mph | 1% |
| Tuesday | 69°F | Sunny | 2 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Marthasville, MO
Last spring frost
Apr 8
First fall frost
Oct 25
Growing season
199 days
Hardiness zone
6b
Explore more for Marthasville, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Washington, Mo (10.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.