Sheridan Reservoir Weather Forecast
- 35
- 62
Mostly Sunny
- 42
- 71
Partly Sunny
- 41
- 79
Partly Sunny
- 46
- 80
Partly Sunny
- 42
- 78
Partly Sunny
- 40
- 71
Mostly Sunny
Today 9 May Centennial Mountains/Island Park
Sunny. Highs 59 to 69.
Tonight 9 May Centennial Mountains/Island Park
Mostly clear. Lows 33 to 43.
Sheridan Reservoir Temperature Statistics
May Temperature
West Yellowstone (32.3 miles)
Lowest 6 May, 2026
14 °FAverage May
44.1 °FHighest 7 May, 2026
64.4 °F
Climate (2021–Present)
West Yellowstone (32.3 miles)
Average Low 2021–2026
33.8 °FAverage 2021–2026
51 °FAverage High 2021–2026
66.3 °F