Ontario Weather Forecast
- 31
- 48
Mostly Cloudy
- 37
- 52
Chance Rain
- 26
- 49
Partly Sunny
- 24
- 49
Slight Chance Snow
- 18
- 39
Mostly Sunny
- 30
- 48
Mostly Sunny
Today 3 Apr Vernon
Mostly cloudy. Cooler with Highs in the upper 40s. West Winds 10 to 15 Mph.
Tonight 3 Apr Vernon
Mostly cloudy. Lows in the lower 30s. Northwest Winds around 5 Mph, becoming northeast after midnight.
Ontario Temperature Statistics
April Temperature
Sparta, Sparta / Fort McCoy Airport (17.4 miles)
Lowest 1 April, 2025
16.5 °FAverage April
32.2 °FHighest 1 April, 2025
43.2 °F
Climate (2020–Present)
Sparta, Sparta / Fort McCoy Airport (17.4 miles)
Average Low 2020–2025
34.2 °FAverage 2020–2025
47 °FAverage High 2020–2025
57.7 °F