Dewey Weather Forecast
- 31
- 64
Mostly Sunny
- 32
- 63
Mostly Sunny
- 37
- 65
Mostly Sunny
- 43
- 71
Partly Sunny
- 36
- 66
Chance Rain Showers
- 30
- 54
Chance Rain Showers
- 26
- 50
Mostly Sunny
Today 22 Oct Southern Black Hills
Sunny. Highs in the lower 60s. North Winds 5 to 10 Mph with Gusts up to 20 Mph.
Tonight 22 Oct Southern Black Hills
Mostly clear. Lows in the mid 30s. Northeast Winds 5 to 10 Mph.
Dewey Temperature Statistics
October Temperature
Custer, Custer County Airport (24.9 miles)
Lowest 13 October, 2025
26.1 °FAverage October
48.9 °FHighest 3 October, 2025
81 °F
Climate (2020–Present)
Custer, Custer County Airport (24.9 miles)
Average Low 2020–2025
33.2 °FAverage 2020–2025
44.8 °FAverage High 2020–2025
56.2 °F