Crystal Lake Weather Forecast
- 54
- 84
Mostly Cloudy
- 54
- 74
Increasing Clouds
- 59
- 77
Slight Chance Thunderstorms
- 60
- 82
Mostly Sunny
- 56
- 81
Slight Chance Thunderstorms
- 50
- 71
Partly Sunny
- 48
- 64
Mostly Sunny
Today 16 Aug Snowy and Judith Mountains
Sunny in the Morning, then partly cloudy with a 20 percent chance of Showers and Thunderstorms in the afternoon. Haze in the afternoon. Locally heavy rainfall possible in the afternoon. Highs 80 to 85. West Winds up to 10 Mph shifting to the northeast in the afternoon.
Tonight 16 Aug Snowy and Judith Mountains
Mostly cloudy with a 40 percent chance of Thunderstorms in the Evening, then partly cloudy after midnight. Lows in the mid 50s. South Winds 5 to 10 Mph shifting to the west after midnight.
Crystal Lake Temperature Statistics
August Temperature
Lewistown, Lewistown Municipal Airport (16.8 miles)
Lowest 10 August, 2025
47.6 °FAverage August
66 °FHighest 13 August, 2025
92.6 °F
Climate (2020–Present)
Lewistown, Lewistown Municipal Airport (16.8 miles)
Average Low 2020–2025
32.2 °FAverage 2020–2025
44.4 °FAverage High 2020–2025
56.3 °F