Frost Dates for Willow, AK

Based on data from Willow West weather station, 1 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. May 15
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 18
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 21
First Fall Frost September 13

Hard Freeze (28°F)

Last Spring Hard Freeze May 3
First Fall Hard Freeze September 27
61.75°N, -150.04°W © OpenStreetMap

Growing Season

126 Days May 15 to September 18

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 3a

Avg. annual minimum: −40 to −35°F (−40 to −37°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Dsc Subarctic (Dry Summer)

Cool, dry summers and cold winters. A rare climate found at high elevations. Very short growing season for cold-tolerant crops only.

Köppen climate map

Temperature

-10° 10° 30° 50° 70°
6°
High: 15°F
Avg: 6°F
Low: -4°F
Jan
13°
High: 25°F
Avg: 13°F
Low: 2°F
Feb
21°
High: 34°F
Avg: 21°F
Low: 7°F
Mar
36°
High: 46°F
Avg: 36°F
Low: 25°F
Apr
48°
High: 58°F
Avg: 48°F
Low: 37°F
May
57°
High: 67°F
Avg: 57°F
Low: 47°F
Jun
60°
High: 68°F
Avg: 60°F
Low: 52°F
Jul
57°
High: 65°F
Avg: 57°F
Low: 49°F
Aug
47°
High: 56°F
Avg: 47°F
Low: 39°F
Sep
32°
High: 41°F
Avg: 32°F
Low: 24°F
Oct
15°
High: 24°F
Avg: 15°F
Low: 7°F
Nov
9°
High: 18°F
Avg: 9°F
Low: 0°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 4.7"
2.9"
2.94"
Jan
3.3"
3.29"
Feb
2.7"
2.71"
Mar
2.9"
2.91"
Apr
3.7"
3.70"
May
3.3"
3.34"
Jun
4.6"
4.59"
Jul
4.7"
4.71"
Aug
4.2"
4.20"
Sep
3.9"
3.92"
Oct
2.9"
2.89"
Nov
2.6"
2.59"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec6h8.5h11.5h14.5h17h19h18.5h15.5h12.5h9.5h6.5h5h
Jan: 9:06 AM – 2:54 PM · 5h 49m
Feb: 7:44 AM – 4:16 PM · 8h 31m
Mar: 6:21 AM – 5:39 PM · 11h 18m
Apr: 4:48 AM – 7:12 PM · 14h 24m
May: 3:23 AM – 8:37 PM · 17h 14m
Jun: 2:27 AM – 9:33 PM · 19h 07m
Jul: 2:51 AM – 9:09 PM · 18h 18m
Aug: 4:11 AM – 7:49 PM · 15h 37m
Sep: 5:43 AM – 6:17 PM · 12h 33m
Oct: 7:13 AM – 4:47 PM · 9h 33m
Nov: 8:41 AM – 3:19 PM · 6h 38m
Dec: 9:34 AM – 2:26 PM · 4h 53m
Daylight Longest: 19h 11m · Shortest: 4h 50m

Nearby Stations

Whites Crossing, AK May 29 - September 7 Anderson Lake, AK May 16 - September 23 Little Su At Hatcher Pass Brg, AK May 18 - September 18 Matanuska Exp Farm, AK May 14 - September 20 Eklutna Wtp, AK May 18 - September 20 Ben'S Farm, AK May 12 - September 20

Plan Your Garden with Planter

Now that you know your frost dates, use Planter to plan your veggie garden! Planter is an easy drag-and-drop garden planner with personalized planting schedules.

Try Planter For Free

Available everywhere: iOS, Android, web, and more!

Planter app garden planner preview