Lock Haven, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lock Haven, a city in Clinton County, Pennsylvania.
Overnight
44°F
Patchy Fog
Patchy fog. Partly cloudy, with a low around 44. Wind around 0 mph.
7-day forecast for Lock Haven
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 44°F | Patchy Fog | 0 mph | 0% |
| Wednesday | 75°F | Patchy Fog then Mostly Sunny | 0 to 6 mph SE | 2% |
| Wednesday Night | 59°F | Light Rain | 5 mph S | 96% |
| Thursday | 74°F | Light Rain | 3 to 7 mph SW | 83% |
| Thursday Night | 48°F | Mostly Cloudy | 2 mph NW | 11% |
| Friday | 68°F | Partly Sunny | 2 mph W | 12% |
| Friday Night | 43°F | Partly Cloudy | 2 mph W | 10% |
| Saturday | 59°F | Chance Light Rain | 3 to 8 mph W | 35% |
| Saturday Night | 38°F | Chance Light Rain | 7 mph W | 33% |
| Sunday | 57°F | Partly Sunny | 8 mph W | 6% |
| Sunday Night | 35°F | Partly Cloudy | 7 mph W | 6% |
| Monday | 57°F | Slight Chance Light Rain | 5 to 9 mph W | 15% |
| Monday Night | 35°F | Partly Cloudy | 6 mph W | 13% |
| Tuesday | 62°F | Mostly Sunny | 5 to 9 mph W | 4% |
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 Nov 4, 2026.