Williamsport, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williamsport, a town in Washington County, Maryland.
Tonight
50°F
Mostly Clear
Mostly clear, with a low around 50. Southeast wind around 6 mph.
7-day forecast for Williamsport
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Mostly Clear | 6 mph SE | 2% |
| Wednesday | 76°F | Mostly Sunny | 3 to 14 mph S | 2% |
| Wednesday Night | 62°F | Mostly Cloudy then Light Rain | 7 to 12 mph S | 90% |
| Thursday | 77°F | Light Rain | 5 to 10 mph S | 76% |
| Thursday Night | 58°F | Chance Light Rain | 1 to 5 mph W | 46% |
| Friday | 71°F | Chance Light Rain | 3 mph NW | 46% |
| Friday Night | 46°F | Chance Light Rain then Partly Cloudy | 3 mph NW | 41% |
| Saturday | 64°F | Mostly Sunny | 3 to 12 mph NW | 12% |
| Saturday Night | 37°F | Partly Cloudy | 3 to 8 mph NW | 12% |
| Sunday | 61°F | Mostly Sunny | 3 to 8 mph W | 7% |
| Sunday Night | 36°F | Partly Cloudy then Slight Chance Light Rain | 7 mph W | 20% |
| Monday | 61°F | Slight Chance Light Rain | 7 to 14 mph NW | 22% |
| Monday Night | 34°F | Slight Chance Light Rain | 5 to 8 mph W | 22% |
| Tuesday | 65°F | Sunny | 5 to 14 mph W | 7% |
Forecast source: National Weather Service (api.weather.gov) for Williamsport (39.597, -77.818). Updated through the day.
Growing snapshot for Williamsport
Last spring frost
Apr 11
First fall frost
Oct 28
Growing season
199 days
Hardiness zone
7a
More local growing data for Williamsport: nearby ZIP 21795 weather · frost dates · planting calendar · Maryland frost dates
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Climate data from the nearest NOAA station, Hagerstown 1 E, Md (7.9 mi from Williamsport). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.