When is the last frost in Pittsburgh, PA?

The average last spring frost (50% probability of 32°F) in Pittsburgh is around April 16, based on NOAA/NCEI 1991–2020 normals at the Acmetonia Lock 3, PA station (7.6 mi away). Half of years it falls outside that date, so wait 1–2 weeks past it before setting out frost-tender plants.

When is the first fall frost in Pittsburgh?

The average first fall frost in Pittsburgh, PA is around November 1, giving roughly a 197-day frost-free growing season.

What planting zone is Pittsburgh, PA?

Pittsburgh is in USDA plant hardiness zone 7a (average annual extreme minimum temperature 0 to 5°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Pittsburgh?

In Pittsburgh, PA the warmest month is July (avg high 85.8°F) and the coldest is January (avg low 21.5°F). It averages about 43.6″ of precipitation a year and 25″ of snow.

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Pittsburgh, PA Planting Calendar & Frost Dates

USDA hardiness zone 7a · ZIP 15201 · elevation 262′ · NOAA & USDA data

Pittsburgh is in USDA hardiness zone 7a (winters can dip to 0 to 5°F), with a growing season of about 197 days between the average last spring frost (April 16) and first fall frost (November 1). The warmest month is July (avg high 85.8°F); the coldest is January (avg low 21.5°F). It averages 43.6″ of precipitation a year and 25″ of snow, mostly mid-winter. Start cool-season crops several weeks before the last frost; wait until after it for tomatoes, peppers and other tender crops.

Hardiness zone

min temp 0 to 5°F

Last spring frost

April 16

avg (50% prob, 32°F)

First fall frost

November 1

avg (50% prob, 32°F)

Growing season

197 days

frost-free window

Warmest month

July

avg high 85.8°F

Month-by-month typical weather in Pittsburgh

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Murrysville 2 Sw, PA (12.4 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	37.7	21.5	29.6	3.2	10.2
February	40.6	21.9	31.3	2.8	5.6
March	50.3	28.8	39.6	3.3	3
April	63.7	38.9	51.3	3.8	0.2
May	74.1	50.8	62.5	4.1	0
June	82.6	59.4	71	4.6	0
July	85.8	63.9	74.9	4.8	0
August	84.1	62.3	73.2	4.2	0
September	76.6	54.6	65.6	3.4	0
October	64.7	43.1	53.9	3.4	0
November	52	32.9	42.5	2.9	0.7
December	41.4	26.6	34	3.2	5.3

What to plant when in Pittsburgh

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: March 5 · Transplant out: April 23
Peppers	warm	Start seeds indoors: February 19 · Transplant out: April 30
Cucumbers	warm	Direct sow: April 23
Zucchini / squash	warm	Direct sow: April 23
Bush beans	warm	Direct sow: April 23
Sweet corn	warm	Direct sow: April 23
Basil	warm	Transplant out: April 23
Peas	cool	Sow (spring): March 12 · Sow (fall): September 6
Spinach	cool	Sow (spring): March 5 · Sow (fall): September 6
Lettuce	cool	Sow (spring): March 19 · Sow (fall): September 6
Kale	cool	Transplant (spring): March 26 · Sow (fall): August 23
Broccoli	cool	Transplant (spring): April 2
Carrots	cool	Sow (spring): March 26 · Sow (fall): August 23
Onions	cool	Transplant (spring): March 19
Potatoes	cool	Plant seed potatoes: April 2
Radishes	cool	Sow (spring): March 19 · Sow (fall): September 20

Dates are computed from Pittsburgh's average frost dates using standard cool-/warm-season timing. They're a starting point — a cold spring, a warm microclimate, or a fast-maturing variety can shift them by a week or two.

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Gear that helps you plant on time

Some links below are Amazon affiliate links (tag theboringthin-20). If you buy through them we may earn a small commission at no extra cost to you — it keeps this almanac free. We only list generic, genuinely-useful categories.

Soil thermometer →Know when the ground is warm enough to sow — the honest signal, not the calendar.Seed-starting trays + dome →Start tomatoes & peppers indoors on the schedule below.Seedling heat mat →Warms the soil for faster, more even germination indoors.Floating row cover / frost cloth →Buys you 4–8°F to beat an early or late frost.Raised garden bed kit →Warms and drains faster in spring than in-ground soil.Garden gloves →Basic kit for transplant day.

Nearby cities in Pennsylvania

Altoona, PA State College, PA Erie, PA Harrisburg, PA York, PA Lancaster, PA Reading, PA Scranton, PA

Sources & method. Hardiness zone: 2023 USDA Plant Hardiness Zone Map (PRISM Climate Group, Oregon State University). Frost dates & growing season: NOAA/NCEI 1991–2020 U.S. Climate Normals, nearest station with published freeze normals — Acmetonia Lock 3, PA, 7.6 mi (confidence: high). Monthly weather normals: Murrysville 2 Sw, PA, 12.4 mi (confidence: medium). ZIP centroid from U.S. Census 2023 ZCTA data. Frost dates are the 50%-probability date — half of years frost occurs outside the stated date. Nothing here is invented; where the nearest station is far, we say so. Last updated 2026-07-22.