Henrys Lake State Park Weather Forecast
- 42
- 65
Becoming Sunny
- 44
- 69
Mostly Sunny
- 46
- 69
Partly Sunny
- 44
- 66
Partly Sunny
- 41
- 64
Chance Rain Showers
- 43
- 65
Mostly Sunny
Today 17 Sep Centennial Mountains/Island Park
Sunny. Highs 65 to 73.
Tonight 17 Sep Centennial Mountains/Island Park
Mostly clear. Lows 38 to 48.
Henrys Lake State Park Temperature Statistics
September Temperature
West Yellowstone (13 miles)
Lowest 6 September, 2025
28.4 °FAverage September
54.1 °FHighest 3 September, 2025
82.4 °F
Climate (2020–Present)
West Yellowstone (13 miles)
Average Low 2020–2025
33.5 °FAverage 2020–2025
50.8 °FAverage High 2020–2025
66.1 °F