Custer Weather Forecast
- 35
- 49
Slight Chance Rain Showers
- 31
- 45
Mostly Cloudy
- 19
- 49
Rain/Snow Likely
- 30
- 38
Chance Rain Showers
- 23
- 49
Chance Rain/Snow
- 21
- 38
Chance Snow Showers
- 18
- 38
Mostly Cloudy
Today 15 Dec Northeastern Yellowstone
Mostly sunny. Warmer. Highs in the lower 50s. Southwest Winds 5 to 15 Mph.
Tonight 15 Dec Northeastern Yellowstone
Mostly cloudy. A 20 percent chance of rain Showers early in the evening. Lows in the mid 30s. Southwest Winds 10 to 20 Mph.
Custer Temperature Statistics
December Temperature
Billings, Billings Logan International Airport (52.2 miles)
Lowest 12 December, 2025
3.9 °FAverage December
30.9 °FHighest 11 December, 2025
61 °F
Climate (2020–Present)
Billings, Billings Logan International Airport (52.2 miles)
Average Low 2020–2025
38.7 °FAverage 2020–2025
49.5 °FAverage High 2020–2025
60.6 °F