Frost Dates for Atikokan (Aut), ON

Elevation: 389 m

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. May 27
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. September 22

30% Probability

Only 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 1
First Fall Frost September 18

Hard Freeze (−2°C)

Last Spring Hard Freeze May 14
First Fall Hard Freeze October 1
48.77°N, 91.63°W © OpenStreetMap

Growing Season

118 Days May 27 to September 22

USDA Hardiness Zone

Hardiness 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 −37°C

Learn more

Köppen Climate

The 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

Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)
Temperature table
Average monthly temperatures (°C)
Month Avg High Avg Temp Avg Low
January-9°-15°-21°
February-7°-14°-22°
March2°-6°-13°
April9°3°-4°
May17°10°3°
June22°16°9°
July25°19°12°
August24°17°11°
September19°13°7°
October9°5°0°
November1°-3°-7°
December-7°-12°-17°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January15
February18
March25
April48
May81
June114
July109
August74
September97
October64
November36
December23

Sunrise / Sunset

Daylight Eastern Standard Time (EST) Longest: 15h 57m · Shortest: 8h 03m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Eastern Standard Time (EST))
Month Sunrise Sunset Daylight
January9:01 AM5:30 PM8h 29m
February8:24 AM6:19 PM9h 55m
March7:29 AM7:03 PM11h 34m
April6:23 AM7:50 PM13h 27m
May5:31 AM8:34 PM15h 03m
June5:09 AM9:05 PM15h 56m
July5:25 AM8:59 PM15h 34m
August6:06 AM8:16 PM14h 10m
September6:51 AM7:11 PM12h 20m
October7:36 AM6:07 PM10h 31m
November8:25 AM5:18 PM8h 53m
December9:00 AM5:04 PM8h 04m

Nearby Stations

Gunflint Lake 10 Nw, MN May 23 - September 26 Ely 25e, MNMay 21 - September 25 Upsala (Aut), ON June 2 - September 9 Ely, MNMay 24 - September 23 Ely, MNMay 14 - September 29 Orr 3e, MNJune 2 - September 15

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