St. Johns, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Johns, a community in Auglaize County, Ohio.
Overnight
62°F
Light Rain Likely
Rain likely after 3am. Mostly cloudy, with a low around 62. South wind around 18 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for St. Johns
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Light Rain Likely | 18 mph S | 63% |
| Wednesday | 66°F | Light Rain | 16 to 22 mph S | 98% |
| Wednesday Night | 50°F | Light Rain Likely then Mostly Cloudy | 8 to 14 mph SW | 63% |
| Thursday | 61°F | Partly Sunny | 9 to 17 mph SW | 0% |
| Thursday Night | 45°F | Mostly Cloudy then Slight Chance Light Rain | 3 to 8 mph SW | 16% |
| Friday | 55°F | Chance Light Rain | 3 to 12 mph W | 48% |
| Friday Night | 37°F | Chance Light Rain then Mostly Cloudy | 7 to 10 mph NW | 48% |
| Saturday | 52°F | Partly Sunny | 9 mph NW | 4% |
| Saturday Night | 33°F | Partly Cloudy | 2 to 6 mph W | 4% |
| Sunday | 55°F | Sunny | 5 to 13 mph W | 3% |
| Sunday Night | 33°F | Mostly Clear | 5 to 9 mph W | 3% |
| Monday | 58°F | Sunny | 3 to 9 mph W | 3% |
| Monday Night | 38°F | Mostly Clear | 7 mph SW | 1% |
| Tuesday | 62°F | Sunny | 7 to 10 mph W | 1% |
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 4, 2026.