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
73°F
Mostly Sunny
Mostly sunny, with a high near 73. East wind around 10 mph.
7-day forecast for St. Joe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Mostly Sunny | 10 mph E | 2% |
| Tonight | 57°F | Partly Cloudy then Chance Showers And Thunderstorms | 5 mph E | 25% |
| Saturday | 75°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph E | 88% |
| Saturday Night | 63°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph S | 84% |
| Sunday | 73°F | Showers And Thunderstorms | 5 to 10 mph N | 81% |
| Sunday Night | 53°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 56% |
| Monday | 64°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 49% |
| Monday Night | 50°F | Chance Showers And Thunderstorms | 15 mph NE | 38% |
| Tuesday | 63°F | Slight Chance Rain Showers | 15 mph NE | 18% |
| Tuesday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 25% |
| Wednesday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 25% |
| Wednesday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 15 mph NE | 16% |
| Thursday | 67°F | Mostly Cloudy | 5 to 10 mph N | 7% |
| Thursday Night | 51°F | Mostly Cloudy | 5 to 10 mph N | 6% |
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 Sep 18, 2026.