Williamsport, MD Weather & Growing Conditions
Tonight
66°F
Mostly Cloudy then Slight Chance Rain Showers
A slight chance of rain showers after midnight. Mostly cloudy, with a low around 66. Southeast wind around 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 66°F | Mostly Cloudy then Slight Chance Rain Showers | 10 mph SE | 19% |
| Sunday | 81°F | Rain Showers Likely | 7 to 10 mph S | 64% |
| Sunday Night | 60°F | Showers And Thunderstorms Likely | 3 to 9 mph NW | 57% |
| Monday | 71°F | Chance Rain Showers | 10 mph NE | 36% |
| Monday Night | 55°F | Rain Showers Likely | 8 mph NE | 65% |
| Tuesday | 65°F | Showers And Thunderstorms Likely | 7 to 12 mph NE | 73% |
| Tuesday Night | 52°F | Showers And Thunderstorms Likely | 9 mph NE | 72% |
| Wednesday | 58°F | Rain Showers Likely | 10 mph NE | 58% |
| Wednesday Night | 51°F | Chance Rain Showers | 10 mph NE | 38% |
| Thursday | 61°F | Chance Rain Showers | 10 mph NE | 27% |
| Thursday Night | 50°F | Slight Chance Rain Showers | 5 to 8 mph N | 23% |
| Friday | 67°F | Chance Rain Showers | 10 mph N | 25% |
| Friday Night | 50°F | Chance Rain Showers | 9 mph N | 25% |
| Saturday | 71°F | Slight Chance Rain Showers | 10 mph N | 17% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Williamsport, MD
Last spring frost
Apr 11
First fall frost
Oct 28
Growing season
199 days
Hardiness zone
7a
Explore more for Williamsport, MD: full frost dates · planting calendar · Maryland frost dates
Climate data from the nearest NOAA station, Hagerstown 1 E, Md (7.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.