State guides · Pennsylvania · Climate by town
Washington, PA rainfall, snowfall and frost dates
Thirty-year averages for Washington 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.
Washington averages 41.34 in. of precipitation and 31.9 in. of snow a year. The median last spring freeze (32°F) is April 24 and the median first fall freeze is Oct. 23, a growing season of about 181 days. From NOAA’s Washington 3 NE station; checked Nov. 13, 2026.
Is it safe to plant in Washington 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.
Washington frost dates
| 32°F freeze | 9 in 10 years | 1 in 2 years | 1 in 10 years |
|---|---|---|---|
| Last spring freeze comes after | April 8 | April 24 | May 18 |
| First fall freeze comes before | Nov. 5 | Oct. 23 | Oct. 8 |
Hard freeze (28°F): the median last one in spring is April 11 and the median first one in fall is Nov. 2. The growing season between the median 32°F freezes, April 24 to Oct. 23, runs about 181 days.
Planting tender plants after May 18 means a freeze afterward in only about 1 year in 10. Planting on April 24 leaves even odds. For lawn seeding windows, see our Pennsylvania grass seed guide.
Washington rain and snow by month
| Month | Precipitation (in.) | Snow (in.) | Avg high (°F) | Avg low (°F) |
|---|---|---|---|---|
| January | 3.32 | 9.9 | 36.8 | 20.0 |
| February | 2.52 | 7.5 | 40.1 | 21.7 |
| March | 3.51 | 6.1 | 49.4 | 28.7 |
| April | 3.26 | 0.6 | 62.6 | 39.5 |
| May | 4.14 | 0.0 | 71.9 | 49.1 |
| June | 4.48 | 0.0 | 79.8 | 57.9 |
| July | 3.63 | 0.0 | 83.4 | 61.7 |
| August | 3.48 | 0.0 | 82.5 | 60.3 |
| September | 3.57 | 0.0 | 76.1 | 53.5 |
| October | 3.00 | 0.0 | 64.2 | 42.6 |
| November | 3.11 | 1.8 | 51.9 | 33.4 |
| December | 3.32 | 6.0 | 41.4 | 25.9 |
| Year | 41.34 | 31.9 | Average 51.4°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: June, 4.48 in. Driest: February, 2.52 in.
- Snowiest month: January, 9.9 in. Months averaging 1 in. or more: November through March. December through February bring about 73% of the year’s snow.
- Average lows at or below 32°F: December through March.
- Coldest nights: January, average low 20.0°F. Warmest days: July, average high 83.4°F.
Planning outdoor work in Washington
Average lows sit at or below freezing from December 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 Washington
| Town | Miles | Precip. (in.) | Snow (in.) | Median last freeze | Median first freeze |
|---|---|---|---|---|---|
| Donora | 17 | 40.85 | 21.4 | April 27 | Oct. 22 |
| Waynesburg | 19 | 43.07 | 30.1 | May 3 | Oct. 15 |
| Pittsburgh | 21 | 39.61 | 44.1 | April 23 | Oct. 23 |
| Uniontown | 31 | 44.35 | 28.1 | April 30 | Oct. 18 |
| Mount Pleasant | 36 | 43.94 | 29.8 | May 1 | Oct. 13 |
| Butler | 48 | 43.21 | 34.9 | May 7 | Oct. 14 |
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 Washington, PA get a year?
Washington averages 31.9 in. of snow a year, per NOAA’s 1991–2020 normals for its Washington 3 NE station. The snowiest month is January, at 9.9 in.
How much rain does Washington, PA get a year?
Washington averages 41.34 in. of precipitation a year, counting rain and melted snow. The wettest month is June, at 4.48 in.
When is the last frost in Washington, PA?
The median last 32°F freeze in Washington is April 24. In 1 year in 10 it comes after May 18, and in 9 years in 10 after April 8.
When is the first frost in Washington, PA?
The median first 32°F freeze in Washington is Oct. 23. In 1 year in 10 it comes before Oct. 8, and in 9 years in 10 before Nov. 5.
How long is the growing season in Washington?
About 181 days between the median last and first 32°F freezes, April 24 to Oct. 23.
What is the coldest month in Washington?
January, with an average low of 20.0°F and an average high of 36.8°F.
About this data
Station: NOAA’s Washington 3 NE station (GHCN USC00369318), about 3 miles northeast of Washington, elevation 1,300 ft, 40.179° N, 80.189° 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 USC00369318; monthly normals for USC00369318; 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, “Washington, PA Rainfall, Snowfall and Frost Dates,” https://muthlerlandscaping.com/state-guides/pennsylvania/climate/washington/ (last checked November 13, 2026).
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