Frost Dates for Portage Glacier V C, AK

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. May 27
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. September 12
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 June 2
First Fall Frost September 3

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 4
First Fall Hard Freeze October 1
60.78°N, -148.84°W © OpenStreetMap

Growing Season

108 Days May 27 to September 12

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 5a

Learn more

Temperature

10° 30° 50° 70°
22°
High: 28°
Avg: 22°
Low: 16°
Jan
25°
High: 31°
Avg: 25°
Low: 19°
Feb
26°
High: 34°
Avg: 26°
Low: 18°
Mar
36°
High: 43°
Avg: 36°
Low: 29°
Apr
44°
High: 52°
Avg: 44°
Low: 36°
May
51°
High: 60°
Avg: 51°
Low: 43°
Jun
54°
High: 62°
Avg: 54°
Low: 47°
Jul
52°
High: 60°
Avg: 52°
Low: 45°
Aug
47°
High: 54°
Avg: 47°
Low: 40°
Sep
37°
High: 43°
Avg: 37°
Low: 31°
Oct
28°
High: 33°
Avg: 28°
Low: 22°
Nov
25°
High: 31°
Avg: 25°
Low: 18°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 4" 8" 12" 15.6"
12.3"
12.31"
Jan
8.5"
8.52"
Feb
8.4"
8.37"
Mar
9.0"
9.01"
Apr
8.0"
8.03"
May
6.3"
6.34"
Jun
7.2"
7.17"
Jul
9.8"
9.85"
Aug
12.6"
12.60"
Sep
13.2"
13.22"
Oct
13.6"
13.63"
Nov
15.6"
15.63"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec6h9h11h14h17h19h18h15h13h10h7h5h
Jan: 8:56 AM – 3:04 PM · 6h 07m
Feb: 7:40 AM – 4:20 PM · 8h 40m
Mar: 6:20 AM – 5:40 PM · 11h 20m
Apr: 4:51 AM – 7:09 PM · 14h 18m
May: 3:30 AM – 8:30 PM · 16h 60m
Jun: 2:38 AM – 9:22 PM · 18h 43m
Jul: 3:01 AM – 8:59 PM · 17h 59m
Aug: 4:16 AM – 7:44 PM · 15h 28m
Sep: 5:44 AM – 6:16 PM · 12h 32m
Oct: 7:10 AM – 4:50 PM · 9h 39m
Nov: 8:34 AM – 3:26 PM · 6h 53m
Dec: 9:22 AM – 2:38 PM · 5h 16m
Daylight Longest: 18h 47m · Shortest: 5h 13m

Nearby Stations

Whittier, AKApril 25 - October 14 Alyeska, AKMay 8 - September 29 Wally Noerenberg Hatchery, AK May 20 - October 9 Hope, AKMay 18 - September 24 Moose Pass 3nw, AK May 31 - September 8 Main Bay, AKMay 19 - October 6

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