Williamsport (PA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Williamsport.
Climate overview of Williamsport
The climate in Williamsport, Pennsylvania, United States of America, is marked by large temperature swings across the seasons, ranging from 30°C (86°F) in July to 2°C (36°F) in January.
Rain/snowfall is high, totalling around 1068 mm (42 in) per year. July is the wettest month and February the driest. The city also experiences warm summers and very cold winters.
Williamsport Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Williamsport - and find the best time to visit.
Monthly Temperature in Williamsport
In Williamsport, temperatures differ significantly between summer and winter months. Average maximum daytime temperatures range from a comfortable 30°C (86°F) in July, the warmest time of the year, to a very cold 2°C (36°F) during cooler months like January.
At night, you can expect temperatures ranging from 17°C (63°F) in July to around -8°C (18°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Williamsport
Williamsport experiences significant rain/snowfall throughout the year, averaging 1068 mm (42 in) of precipitation annually. While rainfall varies throughout the year, each season offers its own charm. July brings wetter days averaging 108 mm (4.3 in) of precipitation, spread over 12 rainy days.
In contrast, the driest month February experiences a drier climate, with about 60 mm (2.4 in) of snow/rainfall spread across 10 snowy/rainy days. For more details, please visit our Williamsport Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Williamsport
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June, August and September
- Warmest weather: July
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -8°C (18°F).
Frequently asked questions about the climate in Williamsport
What is the best time to visit Williamsport?
May, June, August and September typically offer the most optimal weather in Williamsport. In contrast, January, February, March, November and December tend to have less optimal conditions. Williamsport has warm summers and very cold winters.
What temperatures can I expect in Williamsport?
Daytime highs range from 2°C (36°F) in January to 30°C (86°F) in July. Nighttime lows range from -8°C (18°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Williamsport get?
Annual rainfall is around 1068 mm (42 in). July is the wettest month with 108 mm (4.3 in), while February is the driest with 60 mm (2.4 in).
Williamsport 3-Day Forecast
Williamsport (PA) 3-Day Forecast
Williamsport on the map
Williamsport is highlighted - select any city to see its climate.
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