Cornish Flat Weather Forecast
- 52
- 75
Mostly Cloudy
- 55
- 81
Mostly Sunny
- 36
- 69
Mostly Sunny
- 35
- 66
Mostly Sunny
- 49
- 72
Partly Sunny
- 54
- 77
Partly Sunny
- 59
- 82
Partly Sunny
Today 17 Sep Sullivan
Partly sunny. Highs in the mid 70s. Light and variable Winds.
Tonight 17 Sep Sullivan
Partly cloudy. Isolated Showers after midnight. Patchy fog after midnight. Lows in the lower 50s. Light and variable Winds. Chance of rain 20 percent.
Cornish Flat Temperature Statistics
September Temperature
Lebanon Municipal Airport (8.7 miles)
Lowest 9 September, 2025
41 °FAverage September
61.6 °FHighest 3 September, 2025
82.9 °F
Climate (2020–Present)
Lebanon Municipal Airport (8.7 miles)
Average Low 2020–2025
38.2 °FAverage 2020–2025
48.9 °FAverage High 2020–2025
59.9 °F