St. Johns, OH Weather & Growing Conditions
Tonight
62°F
Mostly Cloudy then Chance Rain Showers
A chance of rain showers after 4am. Mostly cloudy, with a low around 62. South wind 10 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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 | Slight Chance Light Rain | 8 mph NW | 18% |
| Saturday Night | 34°F | Partly Cloudy | 1 to 5 mph W | 12% |
| Sunday | 55°F | Mostly Sunny then Slight Chance Light Rain | 3 to 10 mph W | 16% |
| Sunday Night | 34°F | Slight Chance Light Rain then Partly Cloudy | 8 mph W | 16% |
| Monday | 58°F | Slight Chance Light Rain | 6 to 13 mph W | 16% |
| Monday Night | 38°F | Mostly Clear | 9 mph SW | 14% |
| Tuesday | 62°F | Mostly Sunny | 9 to 13 mph W | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Johns, OH
Last spring frost
Apr 22
First fall frost
Oct 22
Growing season
181 days
Hardiness zone
6a
Explore more for St. Johns, OH: full frost dates · planting calendar · Ohio frost dates
Climate data from the nearest NOAA station, Lima Allen Co Ap, Oh (11.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.