Decker Weather Forecast
- 15
- 39
Increasing Clouds
- 24
- 38
Mostly Cloudy
- 24
- 48
Mostly Cloudy
- 28
- 47
Mostly Cloudy
- 30
- 56
Partly Sunny
- 25
- 49
Partly Sunny
- 23
- 49
Partly Sunny
Today 20 Dec Southern Big Horn
Sunny, Colder. Highs in the lower 40s. Southwest Winds 5 to 15 Mph.
Tonight 20 Dec Southern Big Horn
Partly cloudy. Lows in the lower 20s. Southeast Winds 5 to 15 Mph.
Decker Temperature Statistics
December Temperature
Sheridan County Airport (18 miles)
Lowest 1 December, 2025
1.9 °FAverage December
32.8 °FHighest 17 December, 2025
63 °F
Climate (2020–Present)
Sheridan County Airport (18 miles)
Average Low 2020–2025
33.3 °FAverage 2020–2025
47.2 °FAverage High 2020–2025
61.5 °F