St. Joseph, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Joseph, a city in Buchanan County, Missouri.
Tonight
46°F
Patchy Drizzle
Patchy drizzle before 1am. Cloudy, with a low around 46. West northwest wind around 14 mph, with gusts as high as 21 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for St. Joseph
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Patchy Drizzle | 14 mph WNW | 12% |
| Wednesday | 56°F | Mostly Cloudy | 9 to 14 mph W | 2% |
| Wednesday Night | 42°F | Partly Cloudy | 8 mph W | 1% |
| Thursday | 55°F | Mostly Sunny | 7 to 10 mph NW | 6% |
| Thursday Night | 43°F | Mostly Cloudy | 8 mph NNW | 4% |
| Friday | 54°F | Partly Sunny | 7 mph N | 2% |
| Friday Night | 35°F | Partly Cloudy | 0 to 3 mph NE | 0% |
| Saturday | 56°F | Mostly Sunny | 0 to 3 mph S | 0% |
| Saturday Night | 37°F | Mostly Clear | 2 mph WSW | 0% |
| Sunday | 62°F | Sunny | 5 mph W | 0% |
| Sunday Night | 40°F | Clear | 3 mph SSW | 0% |
| Monday | 67°F | Sunny | 3 to 8 mph SSW | 0% |
| Monday Night | 44°F | Mostly Clear | 2 to 6 mph WSW | 0% |
| Tuesday | 68°F | Sunny | 5 mph N | 0% |
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 Nov 4, 2026.