Cornish Flat Weather Forecast
- 56
- 80
Becoming Sunny
- 35
- 70
Mostly Sunny
- 35
- 66
Mostly Sunny
- 48
- 71
Partly Sunny
- 56
- 77
Partly Sunny
- 58
- 81
Partly Sunny
Today 18 Sep Sullivan
Partly sunny. Isolated Showers in the morning. Highs in the upper 70s. Light and variable Winds. Chance of rain 20 percent.
Tonight 18 Sep Sullivan
Mostly cloudy with isolated Showers. Patchy fog. Near steady temperature 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