Ontario, IN Weather & Growing Conditions
This Afternoon
68°F
Scattered Rain Showers
Scattered rain showers. Mostly cloudy, with a high near 68. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Scattered Rain Showers | 10 to 15 mph SW | 50% |
| Tonight | 48°F | Mostly Cloudy | 10 mph SW | 10% |
| Thursday | 56°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph SW | 15% |
| Thursday Night | 41°F | Rain Showers Likely | 5 to 10 mph W | 56% |
| Friday | 50°F | Chance Rain Showers | 5 to 15 mph NW | 32% |
| Friday Night | 34°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 32% |
| Saturday | 51°F | Partly Sunny | 5 to 10 mph NW | 2% |
| Saturday Night | 31°F | Partly Cloudy | 5 mph W | 0% |
| Sunday | 55°F | Sunny | 5 to 15 mph W | 4% |
| Sunday Night | 34°F | Mostly Clear | 5 to 10 mph W | 4% |
| Monday | 59°F | Sunny | 5 to 10 mph W | 1% |
| Monday Night | 39°F | Mostly Clear | 5 to 10 mph SW | 0% |
| Tuesday | 60°F | Sunny | 5 to 10 mph W | 0% |
| Tuesday Night | 36°F | Partly Cloudy | 0 to 5 mph W | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Ontario, IN
Last spring frost
Apr 26
First fall frost
Oct 21
Growing season
176 days
Hardiness zone
6a
Explore more for Ontario, IN: full frost dates · planting calendar · Indiana frost dates
Climate data from the nearest NOAA station, Lagrange, In (6.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.