Frost Dates for Millbourne, PA

Based on data from Phila Franklin Inst 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. March 30
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. November 17
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 4
First Fall Frost November 11

Hard Freeze (28°F)

Last Spring Hard Freeze March 17
First Fall Hard Freeze November 29
39.96°N, -75.25°W © OpenStreetMap

Growing Season

232 Days March 30 to November 17

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°
35°
High: 42°F
Avg: 35°F
Low: 28°F
Jan
37°
High: 45°F
Avg: 37°F
Low: 30°F
Feb
45°
High: 54°F
Avg: 45°F
Low: 36°F
Mar
56°
High: 66°F
Avg: 56°F
Low: 46°F
Apr
66°
High: 76°F
Avg: 66°F
Low: 56°F
May
75°
High: 85°F
Avg: 75°F
Low: 66°F
Jun
80°
High: 89°F
Avg: 80°F
Low: 71°F
Jul
78°
High: 87°F
Avg: 78°F
Low: 70°F
Aug
72°
High: 80°F
Avg: 72°F
Low: 63°F
Sep
60°
High: 68°F
Avg: 60°F
Low: 51°F
Oct
49°
High: 56°F
Avg: 49°F
Low: 41°F
Nov
40°
High: 47°F
Avg: 40°F
Low: 33°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 3" 6" 9" 9.1"
5.9"
5.89"
Jan
6.0"
5.99"
Feb
6.2"
6.16"
Mar
4.7"
4.74"
Apr
5.7"
5.72"
May
6.6"
6.58"
Jun
7.1"
7.14"
Jul
9.1"
9.13"
Aug
8.0"
7.96"
Sep
7.3"
7.27"
Oct
6.7"
6.67"
Nov
6.3"
6.30"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14h15h14.5h13.5h12h11h9.5h9h
Jan: 7:16 AM – 4:44 PM · 9h 28m
Feb: 6:46 AM – 5:14 PM · 10h 29m
Mar: 6:09 AM – 5:51 PM · 11h 41m
Apr: 5:28 AM – 6:32 PM · 13h 04m
May: 4:54 AM – 7:06 PM · 14h 13m
Jun: 4:35 AM – 7:25 PM · 14h 49m
Jul: 4:43 AM – 7:17 PM · 14h 34m
Aug: 5:13 AM – 6:47 PM · 13h 35m
Sep: 5:53 AM – 6:07 PM · 12h 15m
Oct: 6:33 AM – 5:27 PM · 10h 55m
Nov: 7:08 AM – 4:52 PM · 9h 45m
Dec: 7:25 AM – 4:35 PM · 9h 10m
Daylight Longest: 14h 50m · Shortest: 9h 10m

Nearby Stations

Philadelphia Intl AP, PA April 2 - November 10 Pennsauken 1n, NJ April 15 - October 31 Moorestown, NJ April 12 - November 1 Philadelphia Ne AP, PA April 4 - November 7 Norristown, PA April 8 - October 31 Glassboro 2 Ne, NJ April 8 - November 1

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