Crystal Lake Weather Forecast
- 56
- 72
Mostly Sunny
- 63
- 77
Partly Sunny
- 67
- 83
Mostly Sunny
- 67
- 85
Chance Thunderstorms
- 67
- 81
Chance Thunderstorms
- 66
- 79
Chance Thunderstorms
Today 22 Jul Sullivan
Sunny. Highs in the mid 70s. Northeast Winds around 5 Mph.
Tonight 22 Jul Sullivan
Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 50s. Northeast Winds around 5 Mph, becoming southeast after midnight.
Crystal Lake Temperature Statistics
July Temperature
Williamsport - Lycoming County Airport (14.3 miles)
Lowest 4 July, 2025
56.6 °FAverage July
76.4 °FHighest 7 July, 2025
91.7 °F
Climate (2020–Present)
Williamsport - Lycoming County Airport (14.3 miles)
Average Low 2020–2025
44 °FAverage 2020–2025
53.1 °FAverage High 2020–2025
63.4 °F