St. Joseph, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Joseph, a city in Buchanan County, Missouri.
Today
90°F
Partly Sunny
Partly sunny, with a high near 90. South wind around 5 mph.
7-day forecast for St. Joseph
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Partly Sunny | 5 mph S | 13% |
| Tonight | 69°F | Chance Showers And Thunderstorms | 5 to 8 mph ENE | 40% |
| Wednesday | 81°F | Chance Showers And Thunderstorms | 8 mph NE | 51% |
| Wednesday Night | 65°F | Showers And Thunderstorms Likely | 3 to 9 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 | 71°F | Slight Chance Showers And Thunderstorms | 6 mph SSE | 15% |
| Saturday | 92°F | Sunny | 5 to 10 mph S | 6% |
| Saturday Night | 75°F | Mostly Clear | 13 mph S | 3% |
| Sunday | 94°F | Sunny | 13 mph SSW | 1% |
| Sunday Night | 76°F | Mostly Clear | 12 to 15 mph S | 4% |
| Monday | 95°F | Mostly Sunny | 14 mph SSW | 4% |
| Monday Night | 76°F | Partly Cloudy | 15 mph S | 8% |
Forecast source: National Weather Service (api.weather.gov) for St. Joseph (39.759, -94.821). Updated through the day.
Growing snapshot for St. Joseph
Last spring frost
Apr 19
First fall frost
Oct 17
Growing season
180 days
Hardiness zone
6a
More local growing data for St. Joseph: nearby ZIP 64501 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, St Joseph Rosecrans Ap, Mo (4.2 mi from St. Joseph). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.