St. Joseph, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Joseph, a city in Buchanan County, Missouri.
This Afternoon
67°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. High near 67, with temperatures falling to around 57 in the afternoon. Northwest wind around 16 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for St. Joseph
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Chance Rain Showers | 16 mph NW | 50% |
| Tonight | 46°F | Slight Chance Rain Showers then Cloudy | 13 to 17 mph WNW | 21% |
| Wednesday | 56°F | Mostly Cloudy | 9 to 14 mph W | 7% |
| Wednesday Night | 41°F | Mostly Clear | 7 mph W | 3% |
| Thursday | 56°F | Partly Sunny then Slight Chance Rain Showers | 6 to 10 mph WNW | 18% |
| Thursday Night | 41°F | Mostly Cloudy | 7 mph NNW | 5% |
| Friday | 55°F | Partly Sunny | 6 mph N | 3% |
| Friday Night | 38°F | Mostly Cloudy | 2 mph NNW | 0% |
| Saturday | 59°F | Mostly Sunny | 1 to 5 mph WSW | 2% |
| Saturday Night | 39°F | Mostly Clear | 2 mph W | 6% |
| Sunday | 65°F | Sunny | 5 mph W | 5% |
| Sunday Night | 41°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 68°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 44°F | Mostly Clear | 6 mph W | 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.