Lock Haven, PA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Lock Haven, a city in Clinton County, Pennsylvania.

Tonight

51°F

Partly Cloudy then Patchy Fog

Patchy fog after 1am. Partly cloudy, with a low around 51. Northeast wind around 5 mph.

7-day forecast for Lock Haven

When	Temp	Forecast	Wind	Precip
Tonight	51°F	Partly Cloudy then Patchy Fog	5 mph NE	0%
Saturday	73°F	Patchy Fog then Partly Sunny	2 mph E	3%
Saturday Night	60°F	Mostly Cloudy then Rain Showers	1 to 5 mph SE	80%
Sunday	73°F	Showers And Thunderstorms	5 mph S	99%
Sunday Night	54°F	Rain Showers	6 mph N	81%
Monday	68°F	Chance Rain Showers	6 mph NE	26%
Monday Night	52°F	Chance Rain Showers	6 mph NE	53%
Tuesday	63°F	Rain Showers Likely	7 mph E	64%
Tuesday Night	48°F	Rain Showers Likely	7 mph E	64%
Wednesday	60°F	Chance Rain Showers	7 mph E	49%
Wednesday Night	49°F	Chance Showers And Thunderstorms	6 mph E	46%
Thursday	63°F	Chance Showers And Thunderstorms	5 mph NE	43%
Thursday Night	50°F	Chance Showers And Thunderstorms	3 mph NE	38%
Friday	70°F	Partly Sunny	5 mph N	14%

Forecast source: National Weather Service (api.weather.gov) for Lock Haven (41.137, -77.453). Updated through the day.

Growing snapshot for Lock Haven

Last spring frost

Apr 30

First fall frost

Oct 20

Growing season

173 days

Hardiness zone

More local growing data for Lock Haven: nearby ZIP 17751 weather · frost dates · planting calendar · Pennsylvania frost dates

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Climate data from the nearest NOAA station, Lock Haven Sewage Plt, Pa (4.6 mi from Lock Haven). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.