South Williamsport Weather Forecast
- 62
- 81
Partly Sunny
- 69
- 84
Rain Showers Likely
- 59
- 86
Chance Thunderstorms
- 55
- 80
Mostly Sunny
- 61
- 81
Chance Rain Showers
- 66
- 85
Chance Rain Showers
Today 18 Jul Southern Lycoming
Mostly sunny. Highs in the upper 70s. Northwest Winds 5 to 10 Mph.
Tonight 18 Jul Southern Lycoming
Mostly clear in the Evening, then mostly cloudy with a slight chance of Showers after midnight. Lows in the lower 60s. East Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 20 percent.
South Williamsport Temperature Statistics
July Temperature
Williamsport - Lycoming County Airport (3.7 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 (3.7 miles)
Average Low 2020–2025
44 °FAverage 2020–2025
53.1 °FAverage High 2020–2025
63.4 °F