St. Johns, OH Weather & Growing Conditions
Today
80°F
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
A slight chance of rain showers before 11am, then a slight chance of showers and thunderstorms between 11am and noon, then a chance of showers and thunderstorms between noon and 2pm, then a chance of showers and thunderstorms between 2pm and 3pm, then showers and thunderstorms likely between 3pm and 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Southeast wind around 7 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 7 mph SE | 64% |
| Tonight | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 to 7 mph S | 67% |
| Sunday | 78°F | Showers And Thunderstorms Likely | 3 to 12 mph NW | 68% |
| Sunday Night | 55°F | Showers And Thunderstorms Likely | 12 to 15 mph NE | 64% |
| Monday | 67°F | Chance Rain Showers | 13 to 16 mph NE | 50% |
| Monday Night | 51°F | Chance Rain Showers | 13 to 20 mph NE | 50% |
| Tuesday | 67°F | Mostly Cloudy | 13 to 17 mph NE | 14% |
| Tuesday Night | 53°F | Chance Rain Showers | 13 to 17 mph NE | 52% |
| Wednesday | 67°F | Chance Showers And Thunderstorms | 13 mph NE | 52% |
| Wednesday Night | 53°F | Chance Rain Showers | 6 to 12 mph NE | 50% |
| Thursday | 68°F | Mostly Cloudy | 9 mph NE | 12% |
| Thursday Night | 52°F | Mostly Cloudy | 5 to 10 mph NE | 11% |
| Friday | 70°F | Mostly Sunny | 6 to 10 mph NE | 11% |
| Friday Night | 50°F | Partly Cloudy | 5 to 10 mph NE | 11% |
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 Sep 19, 2026.