Frost Dates for Port Alsworth 1 Sw, 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. June 2
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 5
First Fall Frost September 5

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 19
First Fall Hard Freeze September 25
60.20°N, -154.32°W © OpenStreetMap

Growing Season

102 Days June 2 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 4a

Learn more

Temperature

0° 20° 40° 60°
14°
High: 24°
Avg: 14°
Low: 5°
Jan
20°
High: 29°
Avg: 20°
Low: 10°
Feb
21°
High: 32°
Avg: 21°
Low: 11°
Mar
35°
High: 46°
Avg: 35°
Low: 24°
Apr
45°
High: 58°
Avg: 45°
Low: 32°
May
53°
High: 65°
Avg: 53°
Low: 41°
Jun
57°
High: 67°
Avg: 57°
Low: 46°
Jul
54°
High: 63°
Avg: 54°
Low: 45°
Aug
46°
High: 55°
Avg: 46°
Low: 38°
Sep
33°
High: 42°
Avg: 33°
Low: 25°
Oct
22°
High: 30°
Avg: 22°
Low: 15°
Nov
17°
High: 25°
Avg: 17°
Low: 9°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 4.1"
1.7"
1.67"
Jan
1.8"
1.84"
Feb
2.1"
2.07"
Mar
1.8"
1.76"
Apr
1.6"
1.56"
May
2.0"
2.01"
Jun
2.7"
2.71"
Jul
3.3"
3.33"
Aug
4.1"
4.06"
Sep
3.1"
3.14"
Oct
2.2"
2.16"
Nov
2.0"
1.97"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec6h9h11h14h17h19h18h15h13h10h7h5h
Jan: 8:51 AM – 3:09 PM · 6h 18m
Feb: 7:37 AM – 4:23 PM · 8h 45m
Mar: 6:20 AM – 5:40 PM · 11h 21m
Apr: 4:53 AM – 7:07 PM · 14h 15m
May: 3:34 AM – 8:26 PM · 16h 52m
Jun: 2:45 AM – 9:15 PM · 18h 30m
Jul: 3:06 AM – 8:54 PM · 17h 48m
Aug: 4:19 AM – 7:41 PM · 15h 23m
Sep: 5:44 AM – 6:16 PM · 12h 31m
Oct: 7:09 AM – 4:51 PM · 9h 43m
Nov: 8:29 AM – 3:31 PM · 7h 02m
Dec: 9:15 AM – 2:45 PM · 5h 29m
Daylight Longest: 18h 34m · Shortest: 5h 26m

Nearby Stations

Port Alsworth, AK May 12 - September 24 Iliamna AP, AKMay 10 - October 1 Intricate Bay, AK June 4 - September 12

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