St. Joseph, MO Weather & Growing Conditions
Today
90°F
Partly Sunny
Partly sunny, with a high near 90. Heat index values as high as 96. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Partly Sunny | 5 mph S | 13% |
| Tonight | 69°F | Chance Showers And Thunderstorms | 7 mph ENE | 40% |
| Wednesday | 81°F | Chance Showers And Thunderstorms | 8 mph NNE | 50% |
| Wednesday Night | 65°F | Showers And Thunderstorms Likely | 3 to 8 mph NE | 64% |
| Thursday | 84°F | Showers And Thunderstorms Likely then Mostly Sunny | 5 mph ENE | 64% |
| Thursday Night | 67°F | Partly Cloudy | 5 mph SE | 14% |
| Friday | 88°F | Mostly Sunny | 2 to 6 mph SSE | 14% |
| Friday Night | 70°F | Mostly Clear | 5 mph SSE | 14% |
| Saturday | 92°F | Sunny | 3 to 10 mph S | 6% |
| Saturday Night | 75°F | Mostly Clear | 9 to 13 mph S | 2% |
| Sunday | 94°F | Sunny | 10 to 14 mph SSW | 1% |
| Sunday Night | 75°F | Mostly Clear | 14 mph S | 4% |
| Monday | 95°F | Mostly Sunny | 15 mph SSW | 4% |
| Monday Night | 76°F | Partly Cloudy | 14 mph S | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Joseph, MO
Last spring frost
Apr 19
First fall frost
Oct 17
Growing season
180 days
Hardiness zone
6a
Explore more for St. Joseph, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, St Joseph Rosecrans Ap, Mo (4.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.