Lewistown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lewistown, a borough in Mifflin County, Pennsylvania.
Today
86°F
Patchy Fog then Sunny
Patchy fog before 10am. Sunny, with a high near 86. East wind around 1 mph.
7-day forecast for Lewistown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Patchy Fog then Sunny | 1 mph E | 0% |
| Tonight | 63°F | Mostly Cloudy then Patchy Fog | 1 mph NE | 7% |
| Wednesday | 84°F | Patchy Fog then Slight Chance Showers And Thunderstorms | 2 mph E | 20% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms then Areas Of Fog | 1 mph E | 49% |
| Thursday | 89°F | Areas Of Fog then Showers And Thunderstorms | 0 to 3 mph SW | 80% |
| Thursday Night | 69°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 1 mph NW | 80% |
| Friday | 88°F | Showers And Thunderstorms Likely | 2 mph W | 71% |
| Friday Night | 67°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 1 mph NW | 71% |
| Saturday | 86°F | Showers And Thunderstorms Likely | 0 to 3 mph W | 56% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 2 mph NW | 56% |
| Sunday | 89°F | Mostly Sunny | 0 to 3 mph W | 13% |
| Sunday Night | 69°F | Partly Cloudy | 0 to 3 mph SW | 13% |
| Monday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 7 mph W | 23% |
| Monday Night | 68°F | Slight Chance Showers And Thunderstorms | 1 to 6 mph W | 23% |
Forecast source: National Weather Service (api.weather.gov) for Lewistown (40.597, -77.572). Updated through the day.
Growing snapshot for Lewistown
Last spring frost
Apr 21
First fall frost
Oct 24
Growing season
185 days
Hardiness zone
7a
More local growing data for Lewistown: nearby ZIP 17044 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Lewistown, Pa (1.1 mi from Lewistown). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.