St. Johns, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Johns, a community in Auglaize County, Ohio.
This Afternoon
75°F
Sunny
Sunny, with a high near 75. South wind around 15 mph.
7-day forecast for St. Johns
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Sunny | 15 mph S | 2% |
| Tonight | 62°F | Mostly Cloudy then Chance Rain Showers | 10 to 17 mph S | 52% |
| Wednesday | 68°F | Rain Showers | 15 to 21 mph S | 100% |
| Wednesday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 7 to 14 mph SW | 27% |
| Thursday | 63°F | Mostly Sunny | 8 to 17 mph SW | 0% |
| Thursday Night | 45°F | Mostly Cloudy | 2 to 8 mph SW | 2% |
| Friday | 57°F | Chance Light Rain | 3 to 8 mph NW | 28% |
| Friday Night | 38°F | Slight Chance Light Rain | 7 mph NW | 24% |
| Saturday | 53°F | Partly Sunny | 8 mph NW | 12% |
| Saturday Night | 34°F | Partly Cloudy | 1 to 5 mph W | 5% |
| Sunday | 55°F | Mostly Sunny | 3 to 12 mph W | 9% |
| Sunday Night | 34°F | Partly Cloudy | 5 to 8 mph W | 12% |
| Monday | 58°F | Mostly Sunny | 3 to 10 mph W | 13% |
| Monday Night | 38°F | Mostly Clear | 8 mph SW | 13% |
Forecast source: National Weather Service (api.weather.gov) for St. Johns (40.555, -84.080). Updated through the day.
Growing snapshot for St. Johns
Last spring frost
Apr 22
First fall frost
Oct 22
Growing season
181 days
Hardiness zone
6a
More local growing data for St. Johns: nearby ZIP 45884 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Lima Allen Co Ap, Oh (11.6 mi from St. Johns). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.