Frost Dates for Youngsville, PA

Based on data from Allentown Intl AP weather station, 9 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 20
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 24
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 26
First Fall Frost October 17

Hard Freeze (28°F)

Last Spring Hard Freeze April 5
First Fall Hard Freeze November 4
40.78°N, -75.48°W © OpenStreetMap

Growing Season

187 Days April 20 to October 24

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 7a

Avg. annual minimum: 0 to 5°F (−18 to −15°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: 38°F
Avg: 30°F
Low: 22°F
Jan
32°
High: 42°F
Avg: 32°F
Low: 23°F
Feb
41°
High: 51°F
Avg: 41°F
Low: 31°F
Mar
52°
High: 63°F
Avg: 52°F
Low: 40°F
Apr
62°
High: 74°F
Avg: 62°F
Low: 51°F
May
71°
High: 82°F
Avg: 71°F
Low: 60°F
Jun
76°
High: 86°F
Avg: 76°F
Low: 65°F
Jul
74°
High: 84°F
Avg: 74°F
Low: 63°F
Aug
66°
High: 77°F
Avg: 66°F
Low: 55°F
Sep
55°
High: 66°F
Avg: 55°F
Low: 44°F
Oct
44°
High: 54°F
Avg: 44°F
Low: 34°F
Nov
35°
High: 43°F
Avg: 35°F
Low: 27°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 3" 6" 8.1"
4.4"
4.38"
Jan
4.2"
4.24"
Feb
5.6"
5.56"
Mar
4.5"
4.55"
Apr
5.4"
5.38"
May
5.9"
5.94"
Jun
8.1"
8.12"
Jul
7.3"
7.33"
Aug
5.7"
5.74"
Sep
5.0"
4.98"
Oct
5.2"
5.17"
Nov
5.5"
5.53"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14.5h15h14.5h13.5h12.5h11h9.5h9h
Jan: 7:18 AM – 4:42 PM · 9h 24m
Feb: 6:47 AM – 5:13 PM · 10h 26m
Mar: 6:10 AM – 5:50 PM · 11h 41m
Apr: 5:27 AM – 6:33 PM · 13h 05m
May: 4:52 AM – 7:08 PM · 14h 16m
Jun: 4:33 AM – 7:27 PM · 14h 54m
Jul: 4:41 AM – 7:19 PM · 14h 38m
Aug: 5:11 AM – 6:49 PM · 13h 37m
Sep: 5:52 AM – 6:08 PM · 12h 15m
Oct: 6:33 AM – 5:27 PM · 10h 53m
Nov: 7:09 AM – 4:51 PM · 9h 41m
Dec: 7:27 AM – 4:33 PM · 9h 06m
Daylight Longest: 14h 55m · Shortest: 9h 05m

Nearby Stations

Springtown 1 Nne, PA April 21 - October 22 Phillipsburg-Easton Brg, NJ April 18 - October 25 Rodale Rsch Ctr, PA April 26 - October 14 Bucksville, PA April 29 - October 16 Lehighton 1ssw, PA April 21 - October 23 Sellersville, PA April 26 - October 17

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