Tupper Lake Weather Forecast
- 56
- 88
Mostly Sunny
- 53
- 85
Mostly Sunny
- 56
- 85
Partly Sunny
- 57
- 85
Partly Sunny
- 58
- 88
Partly Sunny
- 58
- 87
Chance Rain Showers
Today 18 Jul Butte/Blackfoot Region
Sunny until late afternoon then becoming partly cloudy. Areas of fog early in the morning. A 20 percent chance of Showers and Thunderstorms late in the afternoon. Highs in the 80s to lower 90s.
Tonight 18 Jul Butte/Blackfoot Region
Mostly clear. A 20 percent chance of Showers and Thunderstorms in the evening. Lows in the 50s.
Tupper Lake Temperature Statistics
July Temperature
Helena Regional Airport (52.2 miles)
Lowest 2 July, 2026
47.6 °FAverage July
71.4 °FHighest 11 July, 2026
101.6 °F
Climate (2021–2026)
Helena Regional Airport (52.2 miles)
Average Low 2021–2026
36.4 °FAverage 2021–2026
47.9 °FAverage High 2021–2026
59.9 °F