Ontario Weather Forecast
- 39
- 66
Becoming Sunny
- 42
- 67
Partly Sunny
- 50
- 70
Rain Showers Likely
- 46
- 66
Rain Showers
- 39
- 59
Slight Chance Rain Showers
- 37
- 61
Partly Sunny
Today 24 Apr Vernon
Mostly sunny. Cooler with Highs in the mid 60s. Northwest Winds 10 to 15 Mph.
Tonight 24 Apr Vernon
Clear, Colder with Lows around 40. North Winds 5 to 10 Mph.
Ontario Temperature Statistics
April Temperature
Sparta, Sparta / Fort McCoy Airport (17.4 miles)
Lowest 7 April, 2026
12 °FAverage April
46.6 °FHighest 17 April, 2026
80.2 °F
Climate (2021–Present)
Sparta, Sparta / Fort McCoy Airport (17.4 miles)
Average Low 2021–2026
34.9 °FAverage 2021–2026
47.5 °FAverage High 2021–2026
58.2 °F