St. Thomas, MO Weather & Growing Conditions
This Afternoon
71°F
Chance Light Rain
A chance of rain and a slight chance of thunderstorms before 3pm, then a slight chance of thunderstorms and a slight chance of rain between 3pm and 4pm, then a chance of rain and a slight chance of thunderstorms between 4pm and 5pm. Cloudy. High near 71, with temperatures falling to around 65 in the afternoon. South wind 10 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 50%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Chance Light Rain | 10 to 16 mph S | 52% |
| Tonight | 50°F | Chance Rain Showers | 8 mph SW | 12% |
| Wednesday | 63°F | Mostly Cloudy | 6 to 10 mph W | 2% |
| Wednesday Night | 41°F | Mostly Clear | 3 mph SW | 0% |
| Thursday | 65°F | Sunny | 3 to 7 mph W | 11% |
| Thursday Night | 42°F | Mostly Cloudy | 3 mph NW | 10% |
| Friday | 59°F | Partly Sunny | 6 mph NW | 5% |
| Friday Night | 39°F | Partly Cloudy | 2 mph N | 0% |
| Saturday | 58°F | Partly Sunny | 2 mph NW | 1% |
| Saturday Night | 37°F | Partly Cloudy | 1 mph NW | 2% |
| Sunday | 64°F | Sunny | 1 to 5 mph W | 6% |
| Sunday Night | 37°F | Mostly Clear | 3 mph W | 3% |
| Monday | 69°F | Sunny | 6 mph SW | 1% |
| Monday Night | 41°F | Mostly Clear | 3 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Thomas, MO
Last spring frost
Apr 8
First fall frost
Oct 31
Growing season
205 days
Hardiness zone
6b
Explore more for St. Thomas, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Jefferson City Wtp, Mo (14.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.