Johnson Lake Weather Forecast
- 25
- 39
Mostly Sunny
- 31
- 48
Mostly Sunny
- 32
- 51
Mostly Cloudy
- 32
- 50
Chance Rain
- 31
- 52
Slight Chance Rain/Snow
- 29
- 49
Slight Chance Rain/Snow
Today 30 Apr Butte/Blackfoot Region
Mostly sunny. Highs in the 50s.
Tonight 30 Apr Butte/Blackfoot Region
Mostly clear. Lows in the upper 20s to mid 30s.
Johnson Lake Temperature Statistics
April Temperature
Butte, Bert Mooney Airport (47.2 miles)
Lowest 18 April, 2026
16.6 °FAverage April
41.4 °FHighest 19 April, 2026
66 °F
Climate (2021–Present)
Butte, Bert Mooney Airport (47.2 miles)
Average Low 2021–2026
28.5 °FAverage 2021–2026
42.4 °FAverage High 2021–2026
55.8 °F