Deep Lake Weather Forecast
- 37
- 59
Areas Smoke
- 40
- 58
Mostly Sunny
- 46
- 64
Slight Chance Rain Showers
- 44
- 62
Chance Rain Showers
- 43
- 60
Chance Rain Showers
- 41
- 57
Chance Rain Showers
Today 4 Sep Gallatin and Madison County Mountains and Centennial Mountains
Partly cloudy. Areas of smoke. Highs 65 to 75. Northwest Winds 5 to 10 Mph shifting to the north 10 to 20 Mph in the afternoon.
Tonight 4 Sep Gallatin and Madison County Mountains and Centennial Mountains
Colder. Partly cloudy. Areas of smoke. Lows 35 to 45. North Winds 5 to 15 Mph.
Deep Lake Temperature Statistics
September Temperature
Ennis - Big Sky Airport (28 miles)
Lowest 1 September, 2025
46.4 °FAverage September
65.8 °FHighest 1 September, 2025
86 °F
Climate (2020–Present)
Ennis - Big Sky Airport (28 miles)
Average Low 2020–2025
31.3 °FAverage 2020–2025
43.7 °FAverage High 2020–2025
55.7 °F