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.
A frost date is really a percentile from 30 years of records at a nearby weather station: in about half of years a frost still comes after the median date. Both numbers are below, so you can choose the risk yourself.
The odds
Last spring frost
How often a frost still comes on or after each date.
- 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
How often the first freeze comes on or before each date.
- 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
- Summer days
- a usual high of about 28 °C83 °F
- Lettuce and spinach run to seed
- June to September, in hot, long days (how we know)
Summer and rain
A growing garden needs about 25 mm1 in of water a week, rain and watering together. Here is what a normal month brings.
Month by month
- January
- high ~2 °C36 °F · low ~-7 °C20 °F · rain ~82 mm3.2 in
- February
- high ~5 °C41 °F · low ~-6 °C21 °F · rain ~61 mm2.4 in
- March
- high ~10 °C49 °F · low ~-3 °C27 °F · rain ~86 mm3.4 in
- April
- high ~19 °C67 °F · low ~3 °C38 °F · rain ~96 mm3.8 in
- May
- high ~23 °C74 °F · low ~10 °C49 °F · rain ~105 mm4.1 in
- June
- high ~28 °C82 °F · low ~14 °C57 °F · rain ~120 mm4.7 in
- July
- high ~29 °C84 °F · low ~16 °C62 °F · rain ~113 mm4.4 in
- August
- high ~29 °C84 °F · low ~16 °C60 °F · rain ~97 mm3.8 in
- September
- high ~26 °C78 °F · low ~12 °C53 °F · rain ~102 mm4 in
- October
- high ~19 °C66 °F · low ~6 °C43 °F · rain ~80 mm3.1 in
- November
- high ~11 °C51 °F · low ~0 °C33 °F · rain ~81 mm3.2 in
- December
- high ~5 °C41 °F · low ~-3 °C26 °F · rain ~82 mm3.2 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the Schenley Lock station (listed by NOAA as 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 finds the nearest station to your garden and lowers its confidence with distance, so no number is presented as if it were measured in your garden.
Cold air also pools in low ground on the clear, still nights when frost happens, so a hollow can freeze while a slope a few hundred feet away does not. No table can know that about your garden. A few seasons of your own logged frosts can.
ZIP codes nearest this station
15014, 15065, 15629, 15641, 15656, 15673, 16023, 16055, 16229, 16262.
Nearby stations
The nearest stations and how their last-frost dates compare. Together they show how frost varies across your area.
- 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
- Charleroi Lock, PA, last frost by April 13
- Washington 3 NE, PA, last frost by April 24
- Mercer, PA, last frost by May 15
Other stations in Pennsylvania.
- Franklin, PA, last frost by May 2
- Johnstown Cambria County Airport, PA, last frost by April 29
- Prince Gallitzin State Park, PA, last frost by May 10
- Confluence 1 SW Dam, PA, last frost by April 30
- Altoona Blair County Airport, PA, last frost by April 23
- Philipsburg 2 S, PA, last frost by May 13
- State College, PA, last frost by April 20
- Erie International Airport, PA, last frost by April 26
When do I plant? · Where the dates come from
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