Frost dates for Altoona, Pennsylvania
In a typical year, Altoona’s last spring frost lands around Apr 25 and the first fall frost around Oct 21, a growing season of about 179 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 6b.
Right now the typical frost season has arrived; planting waits for spring.
| Odds | Last spring frost | First fall frost |
|---|---|---|
| 10 percent | Apr 10 | Oct 5 |
| 50 percent | Apr 25 | Oct 21 |
| 90 percent | May 11 | Nov 5 |
A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.
Soil in Altoona is typically around 50°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.
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Common questions
When is the last frost in Altoona, Pennsylvania?
Altoona’s last spring frost falls around April 25 in a typical year. One year in ten it is done by April 10, and one year in ten frost holds on until May 11. Frost-sensitive planting usually waits for the late side of that band.
When is the first fall frost in Altoona?
The first fall frost arrives around October 21 in a typical year, as early as October 5 in an early year and as late as November 5 in a late one.
How long is the growing season in Altoona?
About 179 days, counted between the typical last spring frost and the typical first fall frost.
What USDA zone is Altoona in?
Altoona is in USDA hardiness zone 6b under the 2023 USDA Plant Hardiness Zone Map.
Dates come from 30-year NOAA climate normals for the nearest reporting station. They describe odds, not a forecast.
Nearby cities
- Cumberland, MD (around Apr 15 to Oct 24)
- Saint Marys, PA (around May 14 to Oct 6)
- Waynesboro, PA (around Apr 25 to Oct 19)
- Martinsburg, WV (around Apr 17 to Oct 23)
- Harrisburg, PA (around Apr 15 to Oct 23)
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