Ontario, OH Weather & Growing Conditions
Tonight
60°F
Partly Cloudy
Partly cloudy, with a low around 60. South wind 13 to 17 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 60°F | Partly Cloudy | 13 to 17 mph S | 12% |
| Wednesday | 64°F | Light Rain | 18 mph S | 93% |
| Wednesday Night | 52°F | Light Rain Likely | 9 to 18 mph SW | 73% |
| Thursday | 61°F | Mostly Sunny | 9 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 | 12 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). 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 Nov 4, 2026.