Frost dates for Putneyville 2 SE Dam, Pennsylvania
Half of years have their last spring frost by May 10, but 1 year in 10 still frosts after May 28.
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 28
- 1 year in 5
- May 23
- 3 years in 10
- May 19
- 2 years in 5
- May 14
- Half of years (the median)
- May 10
First fall freeze
How often the first freeze comes on or before each date.
- 1 year in 10
- September 30
- 1 year in 5
- October 3
- 3 years in 10
- October 6
- 2 years in 5
- October 8
- Half of years (the median)
- October 12
- Growing season
- about 155 days
- Hardiness zones nearby
- 6a, 6b
- Summer days
- a usual high of about 27 °C80 °F
- Lettuce and spinach run to seed
- June to August, 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 ~1 °C35 °F · low ~-8 °C17 °F · rain ~86 mm3.4 in
- February
- high ~3 °C38 °F · low ~-8 °C18 °F · rain ~73 mm2.9 in
- March
- high ~8 °C47 °F · low ~-4 °C24 °F · rain ~90 mm3.6 in
- April
- high ~16 °C61 °F · low ~1 °C35 °F · rain ~104 mm4.1 in
- May
- high ~22 °C71 °F · low ~7 °C45 °F · rain ~103 mm4.1 in
- June
- high ~26 °C78 °F · low ~12 °C54 °F · rain ~121 mm4.7 in
- July
- high ~28 °C82 °F · low ~14 °C58 °F · rain ~120 mm4.7 in
- August
- high ~27 °C81 °F · low ~14 °C57 °F · rain ~97 mm3.8 in
- September
- high ~24 °C74 °F · low ~10 °C50 °F · rain ~104 mm4.1 in
- October
- high ~17 °C62 °F · low ~4 °C39 °F · rain ~84 mm3.3 in
- November
- high ~10 °C50 °F · low ~-1 °C30 °F · rain ~92 mm3.6 in
- December
- high ~4 °C39 °F · low ~-5 °C23 °F · rain ~89 mm3.5 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the Putneyville 2 SE Dam station (listed by NOAA as Putneyville 2 SE Dam, USC00367229), at 40.92, -79.28. 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
15744, 15747, 15764, 15770, 15771, 15772, 15776, 15778, 15780, 15781, 15784, 15864…
+16 moreShow fewer
16210, 16211, 16222, 16223, 16224, 16230, 16240, 16242, 16244, 16245, 16246, 16250, 16253, 16256, 16259, 16263.
Nearby stations
The nearest stations and how their last-frost dates compare. Together they show how frost varies across your area.
- Schenley Lock, PA, last frost by April 21
- Prince Gallitzin State Park, PA, last frost by May 10
- Franklin, PA, last frost by May 2
- Johnstown Cambria County Airport, PA, last frost by April 29
- Mckeesport, PA, last frost by May 2
- Mercer, PA, last frost by May 15
Other stations in Pennsylvania.
- Beaver Falls 1 NE, PA, last frost by April 27
- Philipsburg 2 S, PA, last frost by May 13
- Charleroi Lock, PA, last frost by April 13
- Altoona Blair County Airport, PA, last frost by April 23
- Washington 3 NE, PA, last frost by April 24
- State College, PA, last frost by April 20
- Confluence 1 SW Dam, PA, last frost by April 30
- Erie International Airport, PA, last frost by April 26
When do I plant? · Where the dates come from
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