Lewistown, PA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Lewistown, a borough in Mifflin County, Pennsylvania.

Today

77°F

Patchy Fog then Mostly Sunny

Patchy fog before 10am. Mostly sunny. High near 77, with temperatures falling to around 70 in the afternoon. Southeast wind 0 to 6 mph.

7-day forecast for Lewistown

When	Temp	Forecast	Wind	Precip
Today	77°F	Patchy Fog then Mostly Sunny	0 to 6 mph SE	1%
Tonight	58°F	Light Rain	2 mph SE	95%
Thursday	76°F	Light Rain	1 to 5 mph S	77%
Thursday Night	49°F	Slight Chance Light Rain then Mostly Cloudy	0 mph	20%
Friday	69°F	Partly Sunny	1 mph NW	13%
Friday Night	43°F	Partly Cloudy	1 mph W	8%
Saturday	59°F	Slight Chance Light Rain	1 to 8 mph W	20%
Saturday Night	36°F	Slight Chance Light Rain then Mostly Cloudy	6 mph W	15%
Sunday	60°F	Mostly Sunny	5 to 8 mph W	5%
Sunday Night	33°F	Partly Cloudy	6 mph W	7%
Monday	59°F	Mostly Sunny	3 to 10 mph W	7%
Monday Night	32°F	Mostly Clear	5 mph W	3%
Tuesday	64°F	Mostly Sunny	2 to 9 mph W	2%
Tuesday Night	33°F	Partly Cloudy	1 to 5 mph W	2%

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

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 Nov 4, 2026.