Williamsport, PA Weather & Growing Conditions
Today
67°F
Partly Sunny
Partly sunny, with a high near 67. East wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 67°F | Partly Sunny | 5 mph E | 1% |
| Tonight | 57°F | Rain Showers | 3 to 14 mph SE | 92% |
| Sunday | 67°F | Rain Showers | 5 to 13 mph S | 92% |
| Sunday Night | 51°F | Chance Rain Showers then Mostly Cloudy | 6 to 13 mph N | 46% |
| Monday | 62°F | Mostly Cloudy | 10 mph N | 2% |
| Monday Night | 48°F | Chance Rain Showers | 8 mph NE | 41% |
| Tuesday | 56°F | Chance Rain Showers | 8 mph E | 43% |
| Tuesday Night | 46°F | Chance Rain Showers | 7 to 10 mph E | 36% |
| Wednesday | 57°F | Chance Rain Showers | 10 mph E | 36% |
| Wednesday Night | 46°F | Chance Rain Showers | 10 mph E | 32% |
| Thursday | 58°F | Chance Rain Showers | 8 mph NE | 37% |
| Thursday Night | 46°F | Chance Rain Showers | 7 mph NE | 37% |
| Friday | 62°F | Chance Rain Showers | 8 mph N | 26% |
| Friday Night | 47°F | Slight Chance Rain Showers | 8 mph N | 21% |
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 (6.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.