Cottage Grove Weather Forecast
- 64
- 85
Mostly Sunny
- 69
- 88
Chance Thunderstorms
- 64
- 85
Chance Thunderstorms
- 61
- 83
Mostly Sunny
- 63
- 86
Mostly Sunny
- 59
- 85
Mostly Sunny
Today 18 Aug Union
Mostly sunny. Highs in the mid 80s. Northeast Winds around 5 Mph.
Tonight 18 Aug Union
Mostly clear. Lows in the mid 60s. East Winds around 5 Mph.
Cottage Grove Temperature Statistics
August Temperature
Cincinnati W Airport (23.6 miles)
Lowest 3 August, 2025
53.6 °FAverage August
74.1 °FHighest 12 August, 2025
91.4 °F
Climate (2020–Present)
Cincinnati W Airport (23.6 miles)
Average Low 2020–2025
44.2 °FAverage 2020–2025
54.3 °FAverage High 2020–2025
64.7 °F