Johnstown, OH Weather & Growing Conditions
Tonight
56°F
Partly Cloudy then Patchy Fog
Patchy fog after 3am. Partly cloudy, with a low around 56. Northeast wind around 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Partly Cloudy then Patchy Fog | 8 mph NE | 2% |
| Saturday | 78°F | Patchy Fog then Slight Chance Showers And Thunderstorms | 6 mph E | 20% |
| Saturday Night | 65°F | Showers And Thunderstorms Likely | 6 mph S | 65% |
| Sunday | 77°F | Showers And Thunderstorms | 6 to 9 mph W | 86% |
| Sunday Night | 59°F | Showers And Thunderstorms | 12 mph NE | 86% |
| Monday | 69°F | Chance Rain Showers | 13 mph NE | 51% |
| Monday Night | 57°F | Chance Rain Showers | 14 mph NE | 48% |
| Tuesday | 69°F | Chance Rain Showers | 14 mph NE | 48% |
| Tuesday Night | 58°F | Rain Showers Likely | 14 mph NE | 60% |
| Wednesday | 68°F | Rain Showers Likely | 10 to 14 mph E | 60% |
| Wednesday Night | 56°F | Chance Showers And Thunderstorms | 12 mph NE | 53% |
| Thursday | 68°F | Slight Chance Rain Showers | 9 mph NE | 22% |
| Thursday Night | 55°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 9 mph N | 19% |
| Friday | 69°F | Partly Sunny | 7 to 10 mph N | 12% |
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 Sep 19, 2026.