State guides · Pennsylvania · Climate by town
Sunbury, PA rainfall, snowfall and frost dates
Thirty-year averages for Sunbury 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.
Sunbury averages 43.69 in. of precipitation and 28.6 in. of snow a year. The median last spring freeze (32°F) is April 30 and the median first fall freeze is Oct. 13, a growing season of about 166 days. From NOAA’s Sunbury station; checked Nov. 13, 2026.
Is it safe to plant in Sunbury 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.
Sunbury frost dates
| 32°F freeze | 9 in 10 years | 1 in 2 years | 1 in 10 years |
|---|---|---|---|
| Last spring freeze comes after | April 15 | April 30 | May 19 |
| First fall freeze comes before | Oct. 31 | Oct. 13 | Sept. 30 |
Hard freeze (28°F): the median last one in spring is April 14 and the median first one in fall is Oct. 26. The growing season between the median 32°F freezes, April 30 to Oct. 13, runs about 166 days.
Planting tender plants after May 19 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.
Sunbury rain and snow by month
| Month | Precipitation (in.) | Snow (in.) | Avg high (°F) | Avg low (°F) |
|---|---|---|---|---|
| January | 2.98 | 7.6 | 35.3 | 18.9 |
| February | 2.30 | 8.6 | 39.0 | 20.6 |
| March | 3.33 | 5.2 | 47.7 | 27.4 |
| April | 3.74 | 0.6 | 61.1 | 37.2 |
| May | 3.77 | 0.0 | 71.7 | 47.2 |
| June | 4.38 | 0.0 | 79.8 | 56.8 |
| July | 4.32 | 0.0 | 84.4 | 60.3 |
| August | 3.93 | 0.0 | 82.2 | 59.2 |
| September | 4.52 | 0.0 | 75.1 | 51.2 |
| October | 3.92 | 0.2 | 63.6 | 40.4 |
| November | 3.16 | 1.5 | 50.8 | 31.8 |
| December | 3.34 | 4.9 | 40.1 | 24.6 |
| Year | 43.69 | 28.6 | 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, 4.52 in. Driest: February, 2.30 in.
- Snowiest month: February, 8.6 in. Months averaging 1 in. or more: November through March. December through February bring about 74% of the year’s snow.
- Average lows at or below 32°F: November through March.
- Coldest nights: January, average low 18.9°F. Warmest days: July, average high 84.4°F.
Planning outdoor work in Sunbury
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 Sunbury
| Town | Miles | Precip. (in.) | Snow (in.) | Median last freeze | Median first freeze |
|---|---|---|---|---|---|
| Selinsgrove | 6 | 43.10 | 29.0 | April 25 | Oct. 22 |
| Lewisburg | 8 | 43.88 | 28.8 | April 26 | Oct. 20 |
| Williamsport | 28 | 43.52 | 35.8 | April 24 | Oct. 23 |
| Mahanoy City | 34 | 53.59 | 48.0 | April 30 | Oct. 22 |
| Benton | 35 | 48.42 | 46.0 | May 4 | Oct. 11 |
| Millheim | 36 | 42.44 | 35.3 | May 5 | Oct. 6 |
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 Sunbury, PA get a year?
Sunbury averages 28.6 in. of snow a year, per NOAA’s 1991–2020 normals for its Sunbury station. The snowiest month is February, at 8.6 in.
How much rain does Sunbury, PA get a year?
Sunbury averages 43.69 in. of precipitation a year, counting rain and melted snow. The wettest month is September, at 4.52 in.
When is the last frost in Sunbury, PA?
The median last 32°F freeze in Sunbury is April 30. In 1 year in 10 it comes after May 19, and in 9 years in 10 after April 15.
When is the first frost in Sunbury, PA?
The median first 32°F freeze in Sunbury is Oct. 13. In 1 year in 10 it comes before Sept. 30, and in 9 years in 10 before Oct. 31.
How long is the growing season in Sunbury?
About 166 days between the median last and first 32°F freezes, April 30 to Oct. 13.
What is the coldest month in Sunbury?
January, with an average low of 18.9°F and an average high of 35.3°F.
About this data
Station: NOAA’s Sunbury station (GHCN USC00368668), elevation 575 ft, 40.853° N, 76.789° 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 representative, its snow normals provisional and its temperature and freeze normals representative. Representative means at least 10 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.
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 USC00368668; monthly normals for USC00368668; NOAA normals file documentation. Checked Nov. 13, 2026.
Muthler Landscaping & Construction · Lock Haven, PA
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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, “Sunbury, PA Rainfall, Snowfall and Frost Dates,” https://muthlerlandscaping.com/state-guides/pennsylvania/climate/sunbury/ (last checked November 13, 2026).
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