Arrowhead Reservoir Weather Forecast
- 46
- 81
Mostly Sunny
- 47
- 79
Mostly Sunny
- 50
- 88
Mostly Sunny
- 46
- 82
Mostly Sunny
- 46
- 77
Partly Sunny
- 44
- 72
Chance Rain Showers
Today 8 Sep Western Crook
Sunny. Highs in the upper 70s. West Winds 5 to 10 Mph with Gusts up to 20 Mph.
Tonight 8 Sep Western Crook
Clear. Lows in the upper 40s. Northwest Winds 5 to 10 Mph.
Arrowhead Reservoir Temperature Statistics
September Temperature
Mondell Field (26.7 miles)
Lowest 2 September, 2026
53.6 °FAverage September
75.4 °FHighest 4 September, 2026
95 °F
Climate (2021–2026)
Mondell Field (26.7 miles)
Average Low 2021–2026
36 °FAverage 2021–2026
48.6 °FAverage High 2021–2026
60.9 °F