Frost Dates for Collegeville, PA

Based on data from Graterford 1 E weather station, 3 miles away

Elevation: 151 ft

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 24
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 15
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 May 1
First Fall Frost October 8

Hard Freeze (28°F)

Last Spring Hard Freeze April 10
First Fall Hard Freeze October 27
40.19°N, -75.45°W © OpenStreetMap

Growing Season

174 Days April 24 to October 15

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 6b

Avg. annual minimum: −5 to 0°F (−21 to −18°C)

Learn more

Köppen Climate iThe 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

20° 40° 60° 80°
30°
High: 40°F
Avg: 30°F
Low: 20°F
Jan
32°
High: 42°F
Avg: 32°F
Low: 22°F
Feb
40°
High: 50°F
Avg: 40°F
Low: 29°F
Mar
50°
High: 62°F
Avg: 50°F
Low: 39°F
Apr
61°
High: 72°F
Avg: 61°F
Low: 49°F
May
70°
High: 81°F
Avg: 70°F
Low: 59°F
Jun
75°
High: 86°F
Avg: 75°F
Low: 64°F
Jul
73°
High: 84°F
Avg: 73°F
Low: 61°F
Aug
65°
High: 78°F
Avg: 65°F
Low: 53°F
Sep
54°
High: 66°F
Avg: 54°F
Low: 41°F
Oct
44°
High: 55°F
Avg: 44°F
Low: 32°F
Nov
35°
High: 45°F
Avg: 35°F
Low: 25°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" 10.0"
8.3"
8.31"
Jan
6.8"
6.79"
Feb
7.1"
7.06"
Mar
6.5"
6.51"
Apr
7.9"
7.86"
May
8.0"
7.99"
Jun
7.5"
7.50"
Jul
10.0"
9.99"
Aug
9.9"
9.89"
Sep
8.8"
8.80"
Oct
7.5"
7.53"
Nov
8.7"
8.67"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14h15h14.5h13.5h12.5h11h9.5h9h
Jan: 7:28 AM – 4:54 PM · 9h 26m
Feb: 7:02 AM – 5:30 PM · 10h 28m
Mar: 7:21 AM – 7:02 PM · 11h 41m
Apr: 6:30 AM – 7:34 PM · 13h 05m
May: 5:51 AM – 8:05 PM · 14h 14m
Jun: 5:36 AM – 8:27 PM · 14h 51m
Jul: 5:49 AM – 8:25 PM · 14h 36m
Aug: 6:18 AM – 7:54 PM · 13h 36m
Sep: 6:49 AM – 7:04 PM · 12h 15m
Oct: 7:20 AM – 6:14 PM · 10h 54m
Nov: 6:55 AM – 4:38 PM · 9h 43m
Dec: 7:23 AM – 4:32 PM · 9h 09m
Daylight Eastern Time (ET) Longest: 14h 52m · Shortest: 9h 08m

Nearby Stations

Pottstown Limerick AP, PA April 20 - October 23 Phoenixville 1 E, PA April 18 - October 27 Norristown, PA April 8 - October 31 Sellersville, PA April 26 - October 17 Willow Grove Nas, PA April 11 - November 1 Doylestown AP, PA April 13 - October 30

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