State guides · Pennsylvania · Climate by town
Port Allegany, PA rainfall, snowfall and frost dates
Thirty-year averages for Port Allegany 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.
Port Allegany averages 42.59 in. of precipitation and 55.1 in. of snow a year. The median last spring freeze (32°F) is May 15 and the median first fall freeze is Oct. 6, a growing season of about 144 days. From NOAA’s Port Allegany station; checked Nov. 13, 2026.
Is it safe to plant in Port Allegany 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.
Port Allegany frost dates
| 32°F freeze | 9 in 10 years | 1 in 2 years | 1 in 10 years |
|---|---|---|---|
| Last spring freeze comes after | April 29 | May 15 | May 29 |
| First fall freeze comes before | Oct. 21 | Oct. 6 | Sept. 25 |
Hard freeze (28°F): the median last one in spring is May 2 and the median first one in fall is Oct. 20. The growing season between the median 32°F freezes, May 15 to Oct. 6, runs about 144 days.
Planting tender plants after May 29 means a freeze afterward in only about 1 year in 10. Planting on May 15 leaves even odds. For lawn seeding windows, see our Pennsylvania grass seed guide.
Port Allegany rain and snow by month
| Month | Precipitation (in.) | Snow (in.) | Avg high (°F) | Avg low (°F) |
|---|---|---|---|---|
| January | 3.05 | 14.1 | 31.0 | 13.6 |
| February | 2.25 | 12.1 | 33.8 | 14.5 |
| March | 2.98 | 9.4 | 43.1 | 22.3 |
| April | 3.53 | 1.7 | 56.6 | 31.3 |
| May | 3.83 | 0.0 | 68.0 | 42.5 |
| June | 4.24 | 0.0 | 75.6 | 51.7 |
| July | 4.53 | 0.0 | 79.5 | 55.5 |
| August | 4.10 | 0.0 | 77.9 | 54.5 |
| September | 3.69 | 0.0 | 71.4 | 48.0 |
| October | 3.88 | 0.6 | 59.2 | 36.9 |
| November | 3.27 | 3.9 | 46.8 | 28.4 |
| December | 3.24 | 13.3 | 35.8 | 20.6 |
| Year | 42.59 | 55.1 | Average 45.8°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: July, 4.53 in. Driest: February, 2.25 in.
- Snowiest month: January, 14.1 in. Months averaging 1 in. or more: November through April. December through February bring about 72% of the year’s snow.
- Average lows at or below 32°F: November through April.
- Coldest nights: January, average low 13.6°F. Warmest days: July, average high 79.5°F.
Planning outdoor work in Port Allegany
Average lows sit at or below freezing from November through April, 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 Port Allegany
| Town | Miles | Precip. (in.) | Snow (in.) | Median last freeze | Median first freeze |
|---|---|---|---|---|---|
| Coudersport | 13 | 43.98 | 71.8 | May 22 | Oct. 1 |
| Emporium | 22 | 43.84 | 47.1 | May 7 | Oct. 15 |
| Bradford | 23 | 49.57 | 75.2 | May 18 | Oct. 4 |
| Kane | 28 | 48.51 | 92.9 | May 24 | Sept. 28 |
| Ridgway | 36 | 45.55 | 52.7 | May 13 | Oct. 11 |
| Renovo | 44 | 41.22 | 32.7 | April 30 | Oct. 22 |
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 Port Allegany, PA get a year?
Port Allegany averages 55.1 in. of snow a year, per NOAA’s 1991–2020 normals for its Port Allegany station. The snowiest month is January, at 14.1 in.
How much rain does Port Allegany, PA get a year?
Port Allegany averages 42.59 in. of precipitation a year, counting rain and melted snow. The wettest month is July, at 4.53 in.
When is the last frost in Port Allegany, PA?
The median last 32°F freeze in Port Allegany is May 15. In 1 year in 10 it comes after May 29, and in 9 years in 10 after April 29.
When is the first frost in Port Allegany, PA?
The median first 32°F freeze in Port Allegany is Oct. 6. In 1 year in 10 it comes before Sept. 25, and in 9 years in 10 before Oct. 21.
How long is the growing season in Port Allegany?
About 144 days between the median last and first 32°F freezes, May 15 to Oct. 6.
What is the coldest month in Port Allegany?
January, with an average low of 13.6°F and an average high of 31.0°F.
About this data
Station: NOAA’s Port Allegany station (GHCN USC00367103), elevation 1,475 ft, 41.816° N, 78.287° 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 provisional and its temperature and freeze normals representative. Standard means at least 24 years of data, with missing months filled from nearby stations. Provisional means at least 10 years of data, with gaps NOAA could not fill from nearby stations. Representative means at least 10 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 USC00367103; monthly normals for USC00367103; NOAA normals file documentation. Checked Nov. 13, 2026.
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See landscape designAll Pennsylvania townsAlso: Pennsylvania grass seed guide, soil testing, design criteria by ZIP.
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, “Port Allegany, PA Rainfall, Snowfall and Frost Dates,” https://muthlerlandscaping.com/state-guides/pennsylvania/climate/port-allegany/ (last checked November 13, 2026).
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