St. Johns, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Johns, a community in Auglaize County, Ohio.
Today
82°F
Sunny
Sunny, with a high near 82. Northeast wind around 1 mph.
7-day forecast for St. Johns
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Sunny | 1 mph NE | 0% |
| Tonight | 61°F | Mostly Clear | 1 mph E | 0% |
| Wednesday | 85°F | Sunny | 0 to 5 mph W | 2% |
| Wednesday Night | 65°F | Mostly Clear | 0 to 3 mph SW | 4% |
| Thursday | 85°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 8 mph SW | 50% |
| Thursday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 2 to 6 mph SW | 69% |
| Friday | 83°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 to 7 mph SW | 69% |
| Friday Night | 65°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 2 to 6 mph SW | 56% |
| Saturday | 84°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 3 to 8 mph SW | 19% |
| Saturday Night | 66°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 to 7 mph SW | 19% |
| Sunday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 14 mph SW | 15% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 8 to 13 mph SW | 27% |
| Monday | 86°F | Chance Rain Showers | 9 to 13 mph SW | 33% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 7 to 10 mph SW | 44% |
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 Aug 4, 2026.