Frost Dates for Aitkin, MN

Based on data from Aitkin 2e weather station, 2 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 16
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 28
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 23
First Fall Frost September 22

Hard Freeze (28°F)

Last Spring Hard Freeze May 4
First Fall Hard Freeze October 8
46.53°N, -93.71°W © OpenStreetMap

Growing Season

135 Days May 16 to September 28

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

Avg. annual minimum: −30 to −25°F (−34 to −32°C)

Learn more

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

Dfb Warm-Summer Continental

Warm summers and cold, snowy winters. A shorter growing season than hot-summer continental. Hardy vegetables, root crops, and cool-season greens do well. Season extension is valuable.

Köppen climate map

Temperature

0° 20° 40° 60° 80°
9°
High: 19°F
Avg: 9°F
Low: 0°F
Jan
14°
High: 25°F
Avg: 14°F
Low: 4°F
Feb
26°
High: 37°F
Avg: 26°F
Low: 15°F
Mar
40°
High: 52°F
Avg: 40°F
Low: 29°F
Apr
53°
High: 65°F
Avg: 53°F
Low: 40°F
May
63°
High: 75°F
Avg: 63°F
Low: 51°F
Jun
68°
High: 79°F
Avg: 68°F
Low: 56°F
Jul
65°
High: 77°F
Avg: 65°F
Low: 54°F
Aug
57°
High: 69°F
Avg: 57°F
Low: 46°F
Sep
44°
High: 55°F
Avg: 44°F
Low: 34°F
Oct
30°
High: 38°F
Avg: 30°F
Low: 22°F
Nov
17°
High: 25°F
Avg: 17°F
Low: 10°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 3" 6" 8.7"
4.4"
4.37"
Jan
3.7"
3.74"
Feb
5.0"
4.97"
Mar
6.3"
6.25"
Apr
7.2"
7.21"
May
8.7"
8.66"
Jun
8.5"
8.50"
Jul
6.7"
6.67"
Aug
5.4"
5.41"
Sep
5.6"
5.56"
Oct
5.6"
5.56"
Nov
4.7"
4.68"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h15h15.5h15.5h14h12.5h10.5h9h8.5h
Jan: 7:37 AM – 4:23 PM · 8h 46m
Feb: 6:58 AM – 5:02 PM · 10h 05m
Mar: 6:12 AM – 5:48 PM · 11h 36m
Apr: 5:20 AM – 6:40 PM · 13h 21m
May: 4:36 AM – 7:24 PM · 14h 48m
Jun: 4:12 AM – 7:48 PM · 15h 36m
Jul: 4:22 AM – 7:38 PM · 15h 17m
Aug: 5:00 AM – 6:60 PM · 13h 60m
Sep: 5:51 AM – 6:09 PM · 12h 19m
Oct: 6:41 AM – 5:19 PM · 10h 38m
Nov: 7:26 AM – 4:34 PM · 9h 08m
Dec: 7:48 AM – 4:12 PM · 8h 23m
Daylight Longest: 15h 38m · Shortest: 8h 22m

Nearby Stations

Isle 12n, MNMay 10 - October 3 Pine Rvr Dam, MNMay 6 - October 7 Brainerd Crow Wing Co AP, MN May 13 - September 27 Sandy Lake Dam Libby, MN May 7 - October 3 Brainerd, MNMay 8 - September 29 Gull Lake Dam, MN May 2 - October 6

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