South Williamsport, PA Weather & Climate Normals
South Williamsport's real weather, in one number
South Williamsport, PA scores 45/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
South Williamsport's hottest and coldest months
South Williamsport's hottest month is Jul, averaging 74°F; its coldest is Jan, averaging 28°F, a 46.3°F swing across the year, one of the widest gaps in this dataset.
South Williamsport's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 36°F | 21°F | 2.99in | 8.7in |
| Feb | 39°F | 22°F | 2.39in | 8.6in |
| Mar | 49°F | 29°F | 3.29in | 5.7in |
| Apr | 63°F | 39°F | 3.62in | 0.8in |
| May | 74°F | 50°F | 3.83in | 0in |
| Jun | 81°F | 59°F | 3.92in | 0in |
| Jul | 86°F | 63°F | 4.3in | 0in |
| Aug | 84°F | 62°F | 3.8in | 0in |
| Sep | 76°F | 55°F | 4.54in | 0in |
| Oct | 64°F | 43°F | 3.69in | 0.1in |
| Nov | 51°F | 33°F | 3.09in | 1.6in |
| Dec | 40°F | 26°F | 3.26in | 7.1in |
May, Jun, Jul, Aug, and Sep are the best time to see South Williamsport at its mildest; the rest of the year, plan around Jan's cold.
Rain and snow in South Williamsport
South Williamsport averages 42.72in of precipitation a year across roughly 143 days with measurable rain or snow, and 32.6in of snow a year.
Where South Williamsport ranks
South Williamsport ranks 3584 of 4876 US cities in this dataset for comfort score, and 127 of 193 within PA. About 6,176 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Williamsport 2, PA US, 1.6 miles from South Williamsport, not a prediction for any specific day.
More on how this is worked out
What a 30-year climate normal actually is · Why this uses the nearest NOAA station