Frost dates for Schenley Lock, Pennsylvania
Half of years have their last spring frost by April 21 — but 1 year in 10 still frosts after May 9.
Every other site gives you one date. A frost date is not a date: it is a percentile from 30 years of records at a nearby weather station, and planting to the median means losing the crop in half of years. Both numbers are below, so you can choose the risk yourself.
The odds
Last spring frost
- Frost this late in 1 year in 10
- May 9
- 1 year in 5
- May 1
- 3 years in 10
- April 27
- 2 years in 5
- April 24
- Half of years (the median)
- April 21
First fall freeze
- Freeze this early in 1 year in 10
- October 15
- 1 year in 5
- October 20
- 3 years in 10
- October 24
- 2 years in 5
- October 26
- Half of years (the median)
- October 30
- Growing season
- about 190 days
- Hardiness zones nearby
- 6a, 6b
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, station Schenley Lock (USC00367863), at 40.68, -79.67. These are that station's own records, unshifted. The further your garden is from it, the less exactly they describe your ground — the planner resolves the nearest station to your own ZIP and lowers its confidence with distance, rather than presenting one number as if it were measured in your yard.
Cold air also pools in low ground on the clear, still nights when frost happens, so a hollow can freeze while a slope a hundred metres away does not. No table can know that about your garden. Your own logged frosts eventually can.
ZIP codes nearest this station
15006, 15007, 15014, 15024, 15030, 15044, 15049, 15051, 15065, 15068, 15075, 15076, 15084, 15101, 15144, 15613, 15618, 15629, 15641, 15656, 15673, 15680, 15681, 15684, 15686, 15690, 15713, 15725, 15727, 15736, 15752, 15756, 15774, 15783, 16001, 16002, 16023, 16025, 16028, 16029, 16034, 16041, 16045, 16050, 16055, 16056, 16059, 16212, 16226, 16228, 16229, 16236, 16238, 16262.
What can I plant here, and when? →
Nearby stations
The nearest stations, and how their last-frost dates compare — the frost gradient across your area, which no single station shows.
- Mckeesport, PA — last frost by May 2
- Putneyville 2 Se Dam, PA — last frost by May 10
- Beaver Falls 1 Ne, PA — last frost by April 27
- Laurel Mtn, PA — last frost by April 26
- Washington 3 Ne, PA — last frost by April 24
- Mercer, PA — last frost by May 15
Other stations in Pennsylvania.
- Franklin Hcn, PA — last frost by May 2
- Johnstown Cambria Co Ap, PA — last frost by April 29
- Prince Gallitzin Sp, PA — last frost by May 10
- Confluence 1 Sw Dam, PA — last frost by April 30
- Altoona Blair Co Ap, PA — last frost by April 23
- Philipsburg 2 S, PA — last frost by May 13
- State College Hcn, PA — last frost by April 20
- Erie Intl Ap Hcn, PA — last frost by April 26