Frost Dates for Three Hills, AB

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 22
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 29
First Fall Frost September 10

Hard Freeze (−2°C)

Last Spring Hard Freeze May 11
First Fall Hard Freeze September 24
51.77°N, -113.20°W © OpenStreetMap

Growing Season

116 Days May 22 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 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

-20° -5° 10° 25°
-10°
High: -5°C
Avg: -10°C
Low: -16°C
Jan
-9°
High: -3°C
Avg: -9°C
Low: -14°C
Feb
-4°
High: 2°C
Avg: -4°C
Low: -10°C
Mar
4°
High: 10°C
Avg: 4°C
Low: -3°C
Apr
10°
High: 17°C
Avg: 10°C
Low: 3°C
May
14°
High: 21°C
Avg: 14°C
Low: 8°C
Jun
17°
High: 24°C
Avg: 17°C
Low: 9°C
Jul
16°
High: 24°C
Avg: 16°C
Low: 8°C
Aug
11°
High: 19°C
Avg: 11°C
Low: 4°C
Sep
4°
High: 11°C
Avg: 4°C
Low: -3°C
Oct
-3°
High: 2°C
Avg: -3°C
Low: -9°C
Nov
-9°
High: -4°C
Avg: -9°C
Low: -15°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 30 mm 60 mm 90 mm
0 mm
0.0 mm
Jan
0 mm
0.0 mm
Feb
0 mm
0.0 mm
Mar
10 mm
10.2 mm
Apr
43 mm
43.2 mm
May
86 mm
86.4 mm
Jun
64 mm
63.5 mm
Jul
61 mm
61.0 mm
Aug
33 mm
33.0 mm
Sep
5 mm
5.1 mm
Oct
8 mm
7.6 mm
Nov
0 mm
0.0 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8h9.5h11.5h13.5h15.5h16.5h16h14.5h12.5h10.5h8.5h7.5h
Jan: 7:58 AM – 4:02 PM · 8h 03m
Feb: 7:10 AM – 4:50 PM · 9h 40m
Mar: 6:14 AM – 5:46 PM · 11h 31m
Apr: 5:11 AM – 6:49 PM · 13h 37m
May: 4:18 AM – 7:42 PM · 15h 25m
Jun: 3:47 AM – 8:13 PM · 16h 25m
Jul: 3:60 AM – 8:00 PM · 16h 00m
Aug: 4:47 AM – 7:13 PM · 14h 25m
Sep: 5:49 AM – 6:11 PM · 12h 23m
Oct: 6:50 AM – 5:10 PM · 10h 21m
Nov: 7:45 AM – 4:15 PM · 8h 31m
Dec: 8:13 AM – 3:47 PM · 7h 34m
Daylight Longest: 16h 27m · Shortest: 7h 33m

Nearby Stations

Sleepy Hollow, AB May 30 - September 1 Drumheller East, AB May 12 - September 19 Olds, ABMay 18 - September 18 Craigmyle, AB May 25 - September 12 Red Deer A, AB May 23 - September 12 Red Deer, ABMay 18 - September 19

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