Frost Dates for Trooper, PA

Based on data from Norristown weather station, 4 miles away

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. April 8
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. October 31
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly 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 April 15
First Fall Frost October 25

Hard Freeze (28°F)

Last Spring Hard Freeze March 31
First Fall Hard Freeze November 10
40.15°N, -75.40°W © OpenStreetMap

Growing Season

206 Days April 8 to October 31

USDA Hardiness Zone iHardiness 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 7b

Avg. annual minimum: 5 to 10°F (−15 to −12°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Cfa Humid Subtropical

Hot, humid summers and mild winters with rain year-round. Long growing seasons support a wide variety of vegetables, fruits, and ornamentals. The most common climate in the eastern US.

Köppen climate map

Temperature

20° 40° 60° 80°
32°
High: 42°F
Avg: 32°F
Low: 23°F
Jan
34°
High: 44°F
Avg: 34°F
Low: 25°F
Feb
42°
High: 52°F
Avg: 42°F
Low: 32°F
Mar
53°
High: 65°F
Avg: 53°F
Low: 42°F
Apr
64°
High: 75°F
Avg: 64°F
Low: 52°F
May
73°
High: 84°F
Avg: 73°F
Low: 62°F
Jun
78°
High: 89°F
Avg: 78°F
Low: 67°F
Jul
76°
High: 87°F
Avg: 76°F
Low: 65°F
Aug
69°
High: 80°F
Avg: 69°F
Low: 58°F
Sep
57°
High: 68°F
Avg: 57°F
Low: 45°F
Oct
46°
High: 57°F
Avg: 46°F
Low: 35°F
Nov
37°
High: 46°F
Avg: 37°F
Low: 28°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 6" 7.3"
5.3"
5.35"
Jan
5.1"
5.12"
Feb
5.4"
5.44"
Mar
4.7"
4.73"
Apr
4.7"
4.72"
May
5.7"
5.66"
Jun
7.1"
7.11"
Jul
6.3"
6.34"
Aug
5.8"
5.85"
Sep
5.5"
5.55"
Oct
6.3"
6.26"
Nov
7.3"
7.34"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14h15h14.5h13.5h12h11h9.5h9h
Jan: 7:17 AM – 4:43 PM · 9h 27m
Feb: 6:46 AM – 5:14 PM · 10h 28m
Mar: 6:10 AM – 5:50 PM · 11h 41m
Apr: 5:28 AM – 6:32 PM · 13h 04m
May: 4:53 AM – 7:07 PM · 14h 13m
Jun: 4:35 AM – 7:25 PM · 14h 50m
Jul: 4:42 AM – 7:18 PM · 14h 35m
Aug: 5:12 AM – 6:48 PM · 13h 35m
Sep: 5:53 AM – 6:07 PM · 12h 15m
Oct: 6:33 AM – 5:27 PM · 10h 54m
Nov: 7:08 AM – 4:52 PM · 9h 44m
Dec: 7:25 AM – 4:35 PM · 9h 10m
Daylight Longest: 14h 51m · Shortest: 9h 09m

Nearby Stations

Phoenixville 1 E, PA April 18 - October 27 Graterford 1 E, PA April 24 - October 15 Willow Grove Nas, PA April 11 - November 1 Phila Franklin Inst, PA March 30 - November 17 Pottstown Limerick AP, PA April 20 - October 23 Sellersville, PA April 26 - October 17

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