Dennison, OH Weather & Growing Conditions
Today
79°F
Partly Sunny then Slight Chance Rain Showers
A slight chance of rain showers after 2pm. Partly sunny, with a high near 79. East wind around 2 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Partly Sunny then Slight Chance Rain Showers | 2 mph E | 17% |
| Tonight | 64°F | Slight Chance Showers And Thunderstorms | 1 to 5 mph SE | 68% |
| Sunday | 77°F | Showers And Thunderstorms | 5 to 8 mph SW | 87% |
| Sunday Night | 54°F | Showers And Thunderstorms | 10 mph N | 78% |
| Monday | 67°F | Chance Rain Showers | 10 mph NE | 27% |
| Monday Night | 53°F | Chance Rain Showers | 12 mph NE | 47% |
| Tuesday | 65°F | Chance Rain Showers | 13 mph NE | 48% |
| Tuesday Night | 52°F | Rain Showers Likely | 13 to 16 mph E | 74% |
| Wednesday | 64°F | Showers And Thunderstorms Likely | 13 mph E | 74% |
| Wednesday Night | 51°F | Showers And Thunderstorms Likely | 9 to 14 mph E | 64% |
| Thursday | 66°F | Showers And Thunderstorms Likely | 8 mph E | 57% |
| Thursday Night | 51°F | Slight Chance Rain Showers | 7 mph NE | 20% |
| Friday | 69°F | Slight Chance Rain Showers | 5 to 8 mph NE | 17% |
| Friday Night | 49°F | Slight Chance Rain Showers then Partly Cloudy | 7 mph NE | 17% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Dennison, OH
Last spring frost
Apr 29
First fall frost
Oct 15
Growing season
170 days
Hardiness zone
6b
Explore more for Dennison, OH: full frost dates · planting calendar · Ohio frost dates
Climate data from the nearest NOAA station, Dennison Wtr Wks, Oh (3.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.