Marthasville, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marthasville, a city in Warren County, Missouri.
Overnight
53°F
Slight Chance Drizzle
A slight chance of drizzle. Mostly cloudy, with a low around 53. West wind around 8 mph.
7-day forecast for Marthasville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Slight Chance Drizzle | 8 mph W | 13% |
| Wednesday | 59°F | Slight Chance Drizzle then Mostly Cloudy | 6 to 12 mph W | 12% |
| Wednesday Night | 39°F | Mostly Clear | 2 mph W | 0% |
| Thursday | 63°F | Sunny | 2 to 8 mph W | 0% |
| Thursday Night | 41°F | Mostly Cloudy | 2 mph NW | 4% |
| Friday | 56°F | Partly Sunny | 2 to 6 mph N | 3% |
| Friday Night | 32°F | Partly Cloudy | 1 mph N | 0% |
| Saturday | 55°F | Mostly Sunny | 1 mph N | 0% |
| Saturday Night | 30°F | Partly Cloudy | 0 mph | 1% |
| Sunday | 61°F | Sunny | 2 mph NW | 1% |
| Sunday Night | 32°F | Clear | 0 mph | 0% |
| Monday | 66°F | Sunny | 1 mph NW | 0% |
| Monday Night | 37°F | Clear | 0 mph | 1% |
| Tuesday | 69°F | Sunny | 1 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Marthasville (38.631, -91.058). Updated through the day.
Growing snapshot for Marthasville
Last spring frost
Apr 8
First fall frost
Oct 25
Growing season
199 days
Hardiness zone
6b
More local growing data for Marthasville: nearby ZIP 63357 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Washington, Mo (10.1 mi from Marthasville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.