St. Joe, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Joe, a town in Dekalb County, Indiana.
This Afternoon
67°F
Scattered Rain Showers
Scattered rain showers. Cloudy, with a high near 67. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
7-day forecast for St. Joe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Scattered Rain Showers | 15 mph SW | 45% |
| Tonight | 48°F | Mostly Cloudy | 10 mph SW | 10% |
| Thursday | 57°F | Mostly Cloudy | 10 to 15 mph SW | 13% |
| Thursday Night | 42°F | Rain Showers Likely | 5 to 10 mph W | 61% |
| Friday | 50°F | Chance Rain Showers | 5 to 15 mph NW | 28% |
| Friday Night | 35°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 28% |
| Saturday | 50°F | Partly Sunny | 5 to 10 mph NW | 1% |
| Saturday Night | 31°F | Partly Cloudy | 5 mph W | 0% |
| Sunday | 54°F | Sunny | 5 to 15 mph W | 1% |
| Sunday Night | 34°F | Mostly Clear | 5 to 10 mph W | 1% |
| Monday | 58°F | Sunny | 5 to 10 mph W | 1% |
| Monday Night | 39°F | Mostly Clear | 5 to 10 mph SW | 0% |
| Tuesday | 60°F | Sunny | 5 to 10 mph W | 0% |
| Tuesday Night | 36°F | Mostly Clear | 0 to 5 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov) for St. Joe (41.315, -84.901). Updated through the day.
Growing snapshot for St. Joe
Last spring frost
Apr 28
First fall frost
Oct 17
Growing season
170 days
Hardiness zone
6a
More local growing data for St. Joe: nearby ZIP 46785 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Hicksville, Oh (6.6 mi from St. Joe). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.