Frost Dates for Ft Knox Mine, 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 17
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 17
First Fall Frost September 9

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 4
First Fall Hard Freeze September 26
65.00°N, -147.34°W © OpenStreetMap

Growing Season

128 Days May 12 to September 17

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

-10° 10° 30° 50° 70°
4°
High: 10°
Avg: 4°
Low: -3°
Jan
9°
High: 17°
Avg: 9°
Low: 1°
Feb
15°
High: 23°
Avg: 15°
Low: 6°
Mar
32°
High: 41°
Avg: 32°
Low: 23°
Apr
48°
High: 57°
Avg: 48°
Low: 39°
May
58°
High: 67°
Avg: 58°
Low: 49°
Jun
60°
High: 68°
Avg: 60°
Low: 52°
Jul
54°
High: 61°
Avg: 54°
Low: 46°
Aug
44°
High: 50°
Avg: 44°
Low: 37°
Sep
27°
High: 32°
Avg: 27°
Low: 21°
Oct
11°
High: 17°
Avg: 11°
Low: 6°
Nov
6°
High: 13°
Avg: 6°
Low: -1°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 3" 3.9"
1.8"
1.76"
Jan
2.2"
2.16"
Feb
1.7"
1.69"
Mar
1.5"
1.50"
Apr
2.0"
2.04"
May
2.9"
2.90"
Jun
3.9"
3.87"
Jul
3.7"
3.70"
Aug
2.9"
2.90"
Sep
2.4"
2.39"
Oct
1.8"
1.80"
Nov
1.6"
1.55"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec4h8h11h15h18h21h20h16h13h9h6h3h
Jan: 9:46 AM – 2:14 PM · 4h 27m
Feb: 8:02 AM – 3:58 PM · 7h 57m
Mar: 6:24 AM – 5:36 PM · 11h 12m
Apr: 4:37 AM – 7:23 PM · 14h 47m
May: 2:53 AM – 9:07 PM · 18h 15m
Jun: 1:30 AM – 10:30 PM · 21h 01m
Jul: 2:09 AM – 9:51 PM · 19h 42m
Aug: 3:53 AM – 8:07 PM · 16h 14m
Sep: 5:41 AM – 6:19 PM · 12h 38m
Oct: 7:25 AM – 4:35 PM · 9h 10m
Nov: 9:13 AM – 2:47 PM · 5h 35m
Dec: 10:31 AM – 1:29 PM · 2h 58m
Daylight Longest: 21h 08m · Shortest: 2h 52m

Nearby Stations

Fairbanks 11 Ne, AK May 12 - September 16 Gilmore Creek, AK June 1 - August 28 Fox 2 Se, AKMay 28 - September 1 Two Rivers, AK May 30 - September 2 Aurora, AKMay 16 - September 6 Mile 42 Steese, AK May 28 - August 26

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