Lock Haven, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lock Haven, a city in Clinton County, Pennsylvania.
Today
85°F
Patchy Fog then Sunny
Patchy fog before 10am. Sunny, with a high near 85. East wind around 2 mph.
7-day forecast for Lock Haven
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Patchy Fog then Sunny | 2 mph E | 0% |
| Tonight | 63°F | Partly Cloudy then Patchy Fog | 2 mph E | 1% |
| Wednesday | 84°F | Patchy Fog then Slight Chance Showers And Thunderstorms | 0 to 3 mph E | 46% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms | 0 to 3 mph E | 37% |
| Thursday | 88°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 84% |
| Thursday Night | 68°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 2 mph NW | 84% |
| Friday | 87°F | Showers And Thunderstorms | 0 to 3 mph SW | 78% |
| Friday Night | 67°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 2 mph SW | 78% |
| Saturday | 86°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 43% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms then Mostly Cloudy | 3 mph W | 43% |
| Sunday | 89°F | Mostly Sunny | 1 to 6 mph SW | 12% |
| Sunday Night | 69°F | Partly Cloudy | 1 to 5 mph SW | 12% |
| Monday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 8 mph W | 28% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 2 to 7 mph W | 28% |
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
6b
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 Aug 4, 2026.