Marthasville, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marthasville, a city in Warren County, Missouri.
Tonight
49°F
Light Rain Likely
Rain likely before 10pm, then a chance of rain showers between 10pm and 11pm, then a slight chance of rain between midnight and 1am, then a chance of rain showers between 1am and 4am. Cloudy, with a low around 49. Southwest wind 5 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
7-day forecast for Marthasville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Light Rain Likely | 5 to 10 mph SW | 58% |
| Wednesday | 61°F | Mostly Cloudy | 5 to 10 mph W | 2% |
| Wednesday Night | 38°F | Partly Cloudy | 2 mph SW | 0% |
| Thursday | 64°F | Sunny | 1 to 7 mph W | 5% |
| Thursday Night | 39°F | Mostly Cloudy | 1 mph NW | 11% |
| Friday | 57°F | Mostly Cloudy | 1 to 5 mph NW | 3% |
| Friday Night | 35°F | Partly Cloudy | 1 mph N | 2% |
| Saturday | 56°F | Partly Sunny | 1 mph NW | 0% |
| Saturday Night | 32°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 | 37°F | Mostly Clear | 0 mph | 1% |
| Tuesday | 69°F | Sunny | 2 mph W | 1% |
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.