St. Joseph, MO Weather & Growing Conditions
This Afternoon
90°F
Sunny
Sunny, with a high near 90. Heat index values as high as 96. South southwest wind around 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 90°F | Sunny | 9 mph SSW | 11% |
| Tonight | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 7 mph NW | 71% |
| Sunday | 75°F | Chance Showers And Thunderstorms | 8 mph NNE | 35% |
| Sunday Night | 61°F | Showers And Thunderstorms Likely | 5 to 9 mph N | 50% |
| Monday | 68°F | Rain Showers Likely | 6 to 9 mph N | 50% |
| Monday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 9 mph NNE | 24% |
| Tuesday | 65°F | Partly Sunny | 8 mph NNE | 7% |
| Tuesday Night | 50°F | Partly Cloudy | 2 to 7 mph NE | 3% |
| Wednesday | 67°F | Mostly Sunny | 5 mph ENE | 0% |
| Wednesday Night | 53°F | Mostly Cloudy | 3 mph E | 8% |
| Thursday | 73°F | Chance Rain Showers | 5 mph SE | 27% |
| Thursday Night | 59°F | Chance Rain Showers | 3 mph ESE | 32% |
| Friday | 76°F | Chance Rain Showers | 2 to 6 mph E | 33% |
| Friday Night | 61°F | Slight Chance Rain Showers | 5 mph E | 21% |
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 (4.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.