Johnstown, OH Weather & Growing Conditions
Today
84°F
Sunny
Sunny, with a high near 84. East wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Sunny | 5 mph E | 0% |
| Tonight | 64°F | Mostly Clear | 3 mph E | 0% |
| Wednesday | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph SE | 48% |
| Wednesday Night | 67°F | Chance Showers And Thunderstorms | 3 mph S | 33% |
| Thursday | 85°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 9 mph SW | 44% |
| Thursday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 to 7 mph SW | 63% |
| Friday | 82°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 to 9 mph SW | 75% |
| Friday Night | 66°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 3 to 7 mph SW | 75% |
| Saturday | 82°F | Chance Showers And Thunderstorms | 3 to 8 mph SW | 39% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 3 to 7 mph SW | 39% |
| Sunday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 10 mph SW | 20% |
| Sunday Night | 68°F | Slight Chance Showers And Thunderstorms | 6 to 9 mph SW | 22% |
| Monday | 86°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 7 to 12 mph SW | 36% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 6 to 10 mph SW | 39% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Johnstown, OH
Last spring frost
Apr 27
First fall frost
Oct 17
Growing season
172 days
Hardiness zone
6a
Explore more for Johnstown, OH: full frost dates · planting calendar · Ohio frost dates
Climate data from the nearest NOAA station, Centerburg 2 Se, Oh (8.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.