Frost Dates for Derry, PA

Based on data from Laurel Mtn weather station, 11 miles away

Elevation: 1181 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. April 26
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 17

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 2
First Fall Frost October 11

Hard Freeze (28°F)

Last Spring Hard Freeze April 16
First Fall Hard Freeze October 29
40.33°N, 79.30°W © OpenStreetMap

Growing Season

174 Days April 26 to October 17

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 6a

Avg. annual minimum: −10 to −5°F

Learn more

Köppen Climate

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

Warm summers and cold, snowy winters. A shorter growing season than hot-summer continental. Hardy vegetables, root crops, and cool-season greens do well. Season extension is valuable.

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
January36°27°19°
February39°30°20°
March48°38°27°
April61°50°38°
May69°59°48°
June76°66°57°
July80°70°61°
August78°69°59°
September72°62°52°
October62°52°41°
November50°42°33°
December41°33°26°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January5.2
February4.8
March7.2
April7.5
May7.8
June9.4
July10.7
August9.8
September8.1
October7.9
November7.7
December6.0

Sunrise / Sunset

Daylight Eastern Time (ET) Longest: 14h 52m · Shortest: 9h 08m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Eastern Time (ET))
Month Sunrise Sunset Daylight
January7:43 AM5:09 PM9h 26m
February7:17 AM5:45 PM10h 28m
March7:36 AM7:17 PM11h 41m
April6:45 AM7:49 PM13h 04m
May6:06 AM8:20 PM14h 14m
June5:52 AM8:42 PM14h 51m
July6:04 AM8:40 PM14h 36m
August6:33 AM8:09 PM13h 36m
September7:04 AM7:19 PM12h 15m
October7:35 AM6:29 PM10h 54m
November7:10 AM4:54 PM9h 43m
December7:38 AM4:47 PM9h 09m

Nearby Stations

Laurel Summit, PA May 6 - October 12 Rector 3 Ssw, PAMay 5 - October 6 Hidden Valley, PA May 2 - October 17 Donegal 2 Nw, PA April 30 - October 17 Mt Pleasant, PAMay 1 - October 13 Johnstown Cambria Co AP, PA April 29 - October 21

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