Williamsport, PA Weather & Growing Conditions
Today
72°F
Patchy Fog then Mostly Sunny
Patchy fog before 9am. Mostly sunny, with a high near 72. Southeast wind 1 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Patchy Fog then Mostly Sunny | 1 to 8 mph SE | 2% |
| Tonight | 57°F | Light Rain | 6 mph E | 95% |
| Thursday | 72°F | Light Rain | 3 to 8 mph S | 98% |
| Thursday Night | 48°F | Slight Chance Light Rain then Mostly Cloudy | 2 mph SW | 17% |
| Friday | 66°F | Partly Sunny | 2 mph SW | 11% |
| Friday Night | 43°F | Partly Cloudy | 0 to 5 mph W | 11% |
| Saturday | 56°F | Chance Light Rain | 5 to 10 mph W | 36% |
| Saturday Night | 38°F | Chance Light Rain | 9 mph W | 36% |
| Sunday | 55°F | Partly Sunny | 10 mph W | 6% |
| Sunday Night | 36°F | Partly Cloudy | 8 mph W | 6% |
| Monday | 56°F | Mostly Sunny | 8 to 13 mph W | 14% |
| Monday Night | 34°F | Partly Cloudy | 7 mph W | 11% |
| Tuesday | 60°F | Mostly Sunny | 6 to 12 mph W | 6% |
| Tuesday Night | 34°F | Partly Cloudy | 7 mph W | 7% |
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 Nov 4, 2026.