Frost Dates for Port Alsworth, 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 12
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 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 May 18
First Fall Frost September 18

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze April 29
First Fall Hard Freeze October 4
60.20°N, -154.32°W © OpenStreetMap

Growing Season

135 Days May 12 to September 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 3b

Learn more

Temperature

0° 20° 40° 60°
17°
High: 24°
Avg: 17°
Low: 10°
Jan
23°
High: 30°
Avg: 23°
Low: 15°
Feb
25°
High: 35°
Avg: 25°
Low: 15°
Mar
39°
High: 47°
Avg: 39°
Low: 30°
Apr
49°
High: 59°
Avg: 49°
Low: 39°
May
57°
High: 67°
Avg: 57°
Low: 47°
Jun
60°
High: 69°
Avg: 60°
Low: 52°
Jul
58°
High: 66°
Avg: 58°
Low: 49°
Aug
50°
High: 57°
Avg: 50°
Low: 42°
Sep
38°
High: 44°
Avg: 38°
Low: 32°
Oct
27°
High: 32°
Avg: 27°
Low: 21°
Nov
21°
High: 27°
Avg: 21°
Low: 15°
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 17m
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 31m
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 01m
Dec: 9:16 AM – 2:44 PM · 5h 29m
Daylight Longest: 18h 34m · Shortest: 5h 26m

Nearby Stations

Port Alsworth 1 Sw, AK June 2 - September 12 Iliamna AP, AKMay 10 - October 1 Intricate Bay, AK June 4 - September 12

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