Ontario, OH Weather & Growing Conditions
Tonight
55°F
Partly Cloudy
Partly cloudy, with a low around 55. Northeast wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Partly Cloudy | 7 mph NE | 1% |
| Saturday | 78°F | Chance Rain Showers | 6 mph SE | 38% |
| Saturday Night | 65°F | Showers And Thunderstorms Likely | 5 to 9 mph S | 71% |
| Sunday | 76°F | Showers And Thunderstorms | 8 to 12 mph W | 91% |
| Sunday Night | 56°F | Showers And Thunderstorms Likely | 12 mph NE | 61% |
| Monday | 67°F | Chance Rain Showers | 14 mph NE | 47% |
| Monday Night | 53°F | Chance Rain Showers | 14 mph NE | 47% |
| Tuesday | 67°F | Chance Rain Showers | 14 mph NE | 45% |
| Tuesday Night | 55°F | Rain Showers Likely | 15 mph NE | 56% |
| Wednesday | 67°F | Rain Showers Likely | 12 to 15 mph E | 56% |
| Wednesday Night | 53°F | Chance Showers And Thunderstorms | 12 mph E | 54% |
| Thursday | 68°F | Chance Rain Showers | 10 mph NE | 29% |
| Thursday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 9 mph N | 20% |
| Friday | 68°F | Slight Chance Rain Showers | 7 to 12 mph N | 16% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Ontario, OH
Last spring frost
Apr 30
First fall frost
Oct 15
Growing season
167 days
Hardiness zone
6a
Explore more for Ontario, OH: full frost dates · planting calendar · Ohio frost dates
Climate data from the nearest NOAA station, Mansfield 5 W, Oh (2.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.