Frost Dates for Liberty, PA

Based on data from Mckeesport weather station, 1 miles away

Elevation: 909 ft

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. May 2
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. October 20

30% Probability

Only a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.
Last Spring Frost May 10
First Fall Frost October 11

Hard Freeze (28°F)

Last Spring Hard Freeze April 20
First Fall Hard Freeze November 1
40.33°N, 79.86°W © OpenStreetMap

Growing Season

171 Days May 2 to October 20

USDA Hardiness Zone

Hardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.
Zone 6b

Avg. annual minimum: −5 to 0°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dfa Hot-Summer Continental

Hot summers and cold winters with year-round precipitation. Moderate growing season supports warm-season crops like tomatoes, peppers, and corn. Winter protection extends the harvest.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January39°30°21°
February42°32°22°
March51°40°29°
April64°51°38°
May74°60°47°
June81°69°57°
July85°73°61°
August83°72°60°
September77°65°53°
October65°53°42°
November53°42°32°
December43°34°25°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January3.1
February2.5
March3.5
April4.4
May4.8
June5.5
July5.6
August5.2
September4.0
October3.8
November3.7
December3.5

Sunrise / Sunset

Daylight Eastern Time (ET) Longest: 14h 53m · Shortest: 9h 07m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Eastern Time (ET))
Month Sunrise Sunset Daylight
January7:46 AM5:12 PM9h 26m
February7:20 AM5:48 PM10h 27m
March7:39 AM7:20 PM11h 41m
April6:47 AM7:52 PM13h 05m
May6:08 AM8:23 PM14h 14m
June5:54 AM8:46 PM14h 52m
July6:07 AM8:43 PM14h 36m
August6:36 AM8:12 PM13h 36m
September7:06 AM7:21 PM12h 15m
October7:38 AM6:32 PM10h 54m
November7:13 AM4:56 PM9h 43m
December7:41 AM4:49 PM9h 08m

Nearby Stations

Pittsburgh Allegheny Co AP, PA April 18 - October 28 Braddock Lock 2, PA April 5 - November 10 Murrysville 2 Sw, PA April 22 - October 25 Donora 1 Sw, PA April 27 - October 22 Charleroi Lock 4, PA April 13 - November 5 Acmetonia Lock 3, PA April 16 - November 1

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