Williamsport, PA Weather & Growing Conditions
Today
83°F
Patchy Fog then Sunny
Patchy fog before 10am. Sunny, with a high near 83. South wind 0 to 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Patchy Fog then Sunny | 0 to 3 mph S | 0% |
| Tonight | 62°F | Mostly Cloudy then Patchy Fog | 0 to 3 mph E | 1% |
| Wednesday | 82°F | Patchy Fog then Chance Showers And Thunderstorms | 0 to 6 mph E | 34% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 38% |
| Thursday | 86°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph S | 84% |
| Thursday Night | 69°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 3 mph W | 84% |
| Friday | 86°F | Showers And Thunderstorms | 0 to 5 mph W | 75% |
| Friday Night | 67°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 3 mph W | 75% |
| Saturday | 84°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 1 to 6 mph SW | 43% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms then Mostly Cloudy | 1 to 5 mph W | 43% |
| Sunday | 87°F | Mostly Sunny | 1 to 7 mph W | 11% |
| Sunday Night | 68°F | Partly Cloudy | 2 to 6 mph SW | 11% |
| Monday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 12 mph W | 28% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 3 to 9 mph W | 28% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Williamsport, PA
Last spring frost
Apr 25
First fall frost
Oct 24
Growing season
181 days
Hardiness zone
6b
Explore more for Williamsport, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Williamsport 2, Pa (8.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.