Frost Dates for Calmar, Canada

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 20
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 15
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 10

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 8
First Fall Hard Freeze September 25
53.28°N, -113.87°W © OpenStreetMap

Growing Season

118 Days May 20 to September 15

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

Learn more

Temperature

-10° 20° 50° 80°
10°
High: 20°
Avg: 10°
Low: -1°
Jan
17°
High: 29°
Avg: 17°
Low: 5°
Feb
25°
High: 36°
Avg: 25°
Low: 13°
Mar
41°
High: 53°
Avg: 41°
Low: 28°
Apr
51°
High: 64°
Avg: 51°
Low: 38°
May
58°
High: 70°
Avg: 58°
Low: 46°
Jun
62°
High: 74°
Avg: 62°
Low: 50°
Jul
60°
High: 73°
Avg: 60°
Low: 47°
Aug
52°
High: 64°
Avg: 52°
Low: 39°
Sep
40°
High: 51°
Avg: 40°
Low: 28°
Oct
24°
High: 33°
Avg: 24°
Low: 14°
Nov
15°
High: 25°
Avg: 15°
Low: 5°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 3" 3.8"
0.9"
0.90"
Jan
0.3"
0.30"
Feb
0.6"
0.60"
Mar
0.8"
0.80"
Apr
2.2"
2.20"
May
3.3"
3.30"
Jun
3.8"
3.80"
Jul
2.3"
2.30"
Aug
1.7"
1.70"
Sep
1.1"
1.10"
Oct
0.3"
0.30"
Nov
0.0"
0.00"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8h10h11h14h16h17h16h15h12h10h8h7h
Jan: 8:06 AM – 3:54 PM · 7h 48m
Feb: 7:14 AM – 4:46 PM · 9h 32m
Mar: 6:15 AM – 5:45 PM · 11h 30m
Apr: 5:09 AM – 6:51 PM · 13h 43m
May: 4:11 AM – 7:49 PM · 15h 37m
Jun: 3:39 AM – 8:21 PM · 16h 42m
Jul: 3:52 AM – 8:08 PM · 16h 15m
Aug: 4:43 AM – 7:17 PM · 14h 34m
Sep: 5:48 AM – 6:12 PM · 12h 24m
Oct: 6:52 AM – 5:08 PM · 10h 15m
Nov: 7:51 AM – 4:09 PM · 8h 18m
Dec: 8:21 AM – 3:39 PM · 7h 17m
Daylight Longest: 16h 45m · Shortest: 7h 16m

Nearby Stations

Edmonton Woodbend, Canada May 30 - September 12 Edmonton International Cs, Canada May 26 - September 5 Edmonton Int'L A, Canada May 25 - September 11 Edmonton Stony Plain, Canada May 12 - September 22 Edmonton Stony Plain Cs, Canada May 8 - September 23 University Of Alberta Metaboli, Canada May 15 - 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