Lewistown, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lewistown, a community in Frederick County, Maryland.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. Northeast wind around 3 mph.
7-day forecast for Lewistown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 3 mph NE | 0% |
| Tonight | 70°F | Mostly Cloudy then Chance Showers And Thunderstorms | 0 to 3 mph E | 26% |
| Wednesday | 84°F | Rain Showers Likely then Chance Showers And Thunderstorms | 0 to 3 mph E | 72% |
| Wednesday Night | 72°F | Showers And Thunderstorms Likely | 3 mph S | 64% |
| Thursday | 89°F | Partly Sunny then Chance Showers And Thunderstorms | 3 to 7 mph S | 46% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 1 to 6 mph SW | 46% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 48% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 0 to 3 mph W | 48% |
| Saturday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 44% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 0 to 3 mph W | 44% |
| Sunday | 89°F | Mostly Sunny | 0 to 3 mph W | 14% |
| Sunday Night | 72°F | Partly Cloudy | 2 mph W | 14% |
| Monday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 6 mph W | 15% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph W | 15% |
Forecast source: National Weather Service (api.weather.gov) for Lewistown (39.540, -77.421). Updated through the day.
Growing snapshot for Lewistown
Last spring frost
Apr 14
First fall frost
Oct 30
Growing season
197 days
Hardiness zone
7a
More local growing data for Lewistown: nearby ZIP 21788 weather · frost dates · planting calendar · Maryland frost dates
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Climate data from the nearest NOAA station, Catoctin Mtn Park, Md (5.3 mi from Lewistown). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.