Ontario, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ontario, a city in Richland County, Ohio.
Tonight
60°F
Partly Cloudy
Partly cloudy, with a low around 60. South wind 10 to 17 mph.
7-day forecast for Ontario
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 60°F | Partly Cloudy | 10 to 17 mph S | 12% |
| Wednesday | 64°F | Light Rain | 20 mph S | 93% |
| Wednesday Night | 52°F | Light Rain Likely | 9 to 18 mph SW | 73% |
| Thursday | 61°F | Mostly Sunny | 10 to 16 mph SW | 3% |
| Thursday Night | 46°F | Partly Cloudy | 5 to 9 mph SW | 3% |
| Friday | 57°F | Partly Sunny then Chance Light Rain | 5 to 9 mph W | 25% |
| Friday Night | 40°F | Chance Light Rain | 9 mph NW | 25% |
| Saturday | 51°F | Slight Chance Light Rain | 10 mph NW | 22% |
| Saturday Night | 35°F | Slight Chance Light Rain then Partly Cloudy | 7 mph W | 22% |
| Sunday | 52°F | Mostly Sunny then Slight Chance Light Rain | 5 to 12 mph W | 15% |
| Sunday Night | 35°F | Slight Chance Light Rain | 10 mph W | 16% |
| Monday | 54°F | Slight Chance Light Rain | 9 to 13 mph W | 18% |
| Monday Night | 38°F | Slight Chance Light Rain then Partly Cloudy | 10 to 14 mph SW | 18% |
| Tuesday | 58°F | Mostly Sunny | 14 mph W | 5% |
Forecast source: National Weather Service (api.weather.gov) for Ontario (40.768, -82.615). Updated through the day.
Growing snapshot for Ontario
Last spring frost
Apr 30
First fall frost
Oct 15
Growing season
167 days
Hardiness zone
6a
More local growing data for Ontario: nearby ZIP 44906 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mansfield 5 W, Oh (2.2 mi from Ontario). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.