Grammar Airport Weather Forecast
- 40
- 63
Decreasing Clouds
- 41
- 59
Partly Sunny
- 38
- 53
Mostly Cloudy
- 41
- 53
Chance Rain Showers
- 42
- 60
Slight Chance Rain Showers
- 46
- 65
Mostly Cloudy
Today 22 Apr Ontario
Mostly cloudy Early, then becoming mostly sunny. Highs Ranging from around 60 on the Hilltops to the mid 60s across the lower Elevations. Light Winds, becoming northwest around 10 Mph.
Tonight 22 Apr Ontario
Mainly clear in the Evening, then becoming partly cloudy. Lows around 40. Light west Winds.
Grammar Airport Temperature Statistics
April Temperature
Penn Yan, Penn Yan Airport (16.2 miles)
Lowest 8 April, 2026
18 °FAverage April
49.3 °FHighest 16 April, 2026
80.1 °F
Climate (2021–Present)
Penn Yan, Penn Yan Airport (16.2 miles)
Average Low 2021–2026
41.8 °FAverage 2021–2026
50.4 °FAverage High 2021–2026
59.2 °F