Southwest City, MO Weather & Growing Conditions
Today
63°F
Mostly Sunny
Mostly sunny. High near 63, with temperatures falling to around 60 in the afternoon. West wind 5 to 10 mph, with gusts as high as 18 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 63°F | Mostly Sunny | 5 to 10 mph W | 9% |
| Tonight | 42°F | Clear | 3 mph SW | 0% |
| Thursday | 66°F | Sunny then Chance Rain Showers | 1 to 7 mph W | 25% |
| Thursday Night | 44°F | Chance Rain Showers then Mostly Cloudy | 2 to 7 mph N | 26% |
| Friday | 59°F | Partly Sunny | 3 to 8 mph N | 0% |
| Friday Night | 38°F | Mostly Cloudy | 1 to 5 mph NE | 0% |
| Saturday | 58°F | Mostly Sunny | 3 mph NE | 0% |
| Saturday Night | 36°F | Partly Cloudy | 1 mph N | 0% |
| Sunday | 62°F | Sunny | 0 to 3 mph N | 0% |
| Sunday Night | 37°F | Clear | 0 mph | 0% |
| Monday | 67°F | Sunny | 0 to 6 mph S | 0% |
| Monday Night | 42°F | Clear | 2 mph S | 1% |
| Tuesday | 70°F | Sunny | 1 to 6 mph SW | 1% |
| Tuesday Night | 47°F | Mostly Clear | 2 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Southwest City, MO
Last spring frost
Apr 15
First fall frost
Oct 26
Growing season
194 days
Hardiness zone
7a
Explore more for Southwest City, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Anderson 3W, Mo (8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.