State guides · Pennsylvania · Climate by town
Lock Haven, PA rainfall, snowfall and frost dates
Thirty-year averages for Lock Haven from NOAA’s 1991–2020 U.S. Climate Normals: rain and snow by month, the last and first freeze, the growing season, and a frost check for any date.
Lock Haven averages 41.72 in. of precipitation and 29.6 in. of snow a year. The median last spring freeze (32°F) is April 30 and the median first fall freeze is Oct. 20, a growing season of about 173 days. From NOAA’s Lock Haven Sewage Plant station; checked Nov. 13, 2026.
Is it safe to plant in Lock Haven yet?
Dates from January through July check the last spring freeze. Dates from August on check the first fall freeze.
From NOAA’s freeze probabilities for this station. Low spots and valleys can freeze later in spring and earlier in fall than the station.
Lock Haven frost dates
| 32°F freeze | 9 in 10 years | 1 in 2 years | 1 in 10 years |
|---|---|---|---|
| Last spring freeze comes after | April 16 | April 30 | May 15 |
| First fall freeze comes before | Nov. 1 | Oct. 20 | Oct. 5 |
Hard freeze (28°F): the median last one in spring is April 16 and the median first one in fall is Nov. 1. The growing season between the median 32°F freezes, April 30 to Oct. 20, runs about 173 days.
Planting tender plants after May 15 means a freeze afterward in only about 1 year in 10. Planting on April 30 leaves even odds. For lawn seeding windows, see our Pennsylvania grass seed guide.
Lock Haven rain and snow by month
| Month | Precipitation (in.) | Snow (in.) | Avg high (°F) | Avg low (°F) |
|---|---|---|---|---|
| January | 2.76 | 7.5 | 34.9 | 18.3 |
| February | 2.15 | 7.9 | 38.1 | 19.1 |
| March | 3.14 | 6.2 | 47.8 | 26.5 |
| April | 3.56 | 0.6 | 61.8 | 36.4 |
| May | 4.00 | 0.0 | 72.7 | 47.3 |
| June | 3.84 | 0.0 | 80.3 | 56.7 |
| July | 4.11 | 0.0 | 84.8 | 61.2 |
| August | 4.17 | 0.0 | 83.0 | 59.7 |
| September | 4.25 | 0.0 | 75.8 | 52.6 |
| October | 3.76 | 0.1 | 63.5 | 40.6 |
| November | 2.96 | 1.4 | 50.5 | 30.9 |
| December | 3.02 | 5.9 | 39.5 | 24.1 |
| Year | 41.72 | 29.6 | Average 50.3°F | |
Precipitation is rain plus the water in melted snow and ice. Snow is the depth of new snowfall. Monthly figures are NOAA’s normals and may not add exactly to the yearly totals because of rounding.
- Wettest month: September, 4.25 in. Driest: February, 2.15 in.
- Snowiest month: February, 7.9 in. Months averaging 1 in. or more: November through March. December through February bring about 72% of the year’s snow.
- Average lows at or below 32°F: November through March.
- Coldest nights: January, average low 18.3°F. Warmest days: July, average high 84.8°F.
Planning outdoor work in Lock Haven
Average lows sit at or below freezing from November through March, so plan base work, planting and seeding around the frost dates above. Frost depth and ground snow load for footings and roofs are set by your town; our design criteria by ZIP tool shows who sets them for your address. For planting beds, start with a soil test.
Towns near Lock Haven
| Town | Miles | Precip. (in.) | Snow (in.) | Median last freeze | Median first freeze |
|---|---|---|---|---|---|
| Millheim | 17 | 42.44 | 35.3 | May 5 | Oct. 6 |
| Renovo | 21 | 41.22 | 32.7 | April 30 | Oct. 22 |
| Clarence | 27 | 44.47 | 50.3 | May 21 | Sept. 27 |
| Williamsport | 28 | 43.52 | 35.8 | April 24 | Oct. 23 |
| Lewisburg | 32 | 43.88 | 28.8 | April 26 | Oct. 20 |
| State College | 33 | 41.53 | 43.8 | April 20 | Oct. 26 |
Miles are straight-line distances between NOAA stations. See every town on our Pennsylvania rainfall and snowfall by town chart.
Questions
How much snow does Lock Haven, PA get a year?
Lock Haven averages 29.6 in. of snow a year, per NOAA’s 1991–2020 normals for its Lock Haven Sewage Plant station. The snowiest month is February, at 7.9 in.
How much rain does Lock Haven, PA get a year?
Lock Haven averages 41.72 in. of precipitation a year, counting rain and melted snow. The wettest month is September, at 4.25 in.
When is the last frost in Lock Haven, PA?
The median last 32°F freeze in Lock Haven is April 30. In 1 year in 10 it comes after May 15, and in 9 years in 10 after April 16.
When is the first frost in Lock Haven, PA?
The median first 32°F freeze in Lock Haven is Oct. 20. In 1 year in 10 it comes before Oct. 5, and in 9 years in 10 before Nov. 1.
How long is the growing season in Lock Haven?
About 173 days between the median last and first 32°F freezes, April 30 to Oct. 20.
What is the coldest month in Lock Haven?
January, with an average low of 18.3°F and an average high of 34.9°F.
About this data
Station: NOAA’s Lock Haven Sewage Plant station (GHCN USC00365109), elevation 566 ft, 41.131° N, 77.434° W. These are NOAA’s 1991–2020 U.S. Climate Normals, 30-year averages that NOAA recomputes every 10 years. NOAA rates this station’s precipitation normals standard, its snow normals standard and its temperature and freeze normals standard. Standard means at least 24 years of data, with missing months filled from nearby stations.
Your yard can differ from the station. Elevation, valleys and hillsides change how much snow falls and when the first and last freezes come.
Sources: NOAA NCEI, U.S. Climate Normals; annual and seasonal normals for USC00365109; monthly normals for USC00365109; NOAA normals file documentation. Checked Nov. 13, 2026.
Muthler Landscaping & Construction · Lock Haven, PA
Build it on the right schedule
We build patios, retaining walls and landscapes around Lock Haven, Williamsport and State College, and we plan the work around the season.
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Muthler Landscaping & Construction LLC · 913 Bellefonte Ave, Lock Haven, PA 17745 · (570) 397-9800 · PA HIC #PA212584. Climate data from NOAA; not a forecast.
Using this guide? Link to it or cite it. It's free to use with a link back, and we keep it updated against official sources.
Cite as: Muthler Landscaping & Construction, “Lock Haven, PA Rainfall, Snowfall and Frost Dates,” https://muthlerlandscaping.com/state-guides/pennsylvania/climate/lock-haven/ (last checked November 13, 2026).
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