Crystal Lake Weather Forecast
- 55
- 75
Sunny
- 63
- 79
Mostly Sunny
- 66
- 83
Mostly Sunny
- 66
- 83
Chance Thunderstorms
- 63
- 80
Chance Thunderstorms
- 64
- 80
Chance Thunderstorms
- 64
- 77
Rain Showers Likely
Today 4 Jul Sullivan
Sunny. Near steady temperature in the mid 70s. North Winds around 5 Mph.
Tonight 4 Jul Sullivan
Mostly clear. Lows in the mid 50s. Northeast Winds around 5 Mph this Evening, becoming light and variable.
Crystal Lake Temperature Statistics
July Temperature
Williamsport - Lycoming County Airport (14.3 miles)
Lowest 2 July, 2025
66.9 °FAverage July
77.3 °FHighest 2 July, 2025
88 °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