Frost Dates for Cop Upper, 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 18
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 21
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 24
First Fall Frost September 16

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 5
First Fall Hard Freeze September 28
51.08°N, -114.22°W © OpenStreetMap

Growing Season

126 Days May 18 to September 21

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 4b

Learn more

Temperature

10° 30° 50° 70°
22°
High: 31°
Avg: 22°
Low: 13°
Jan
23°
High: 32°
Avg: 23°
Low: 13°
Feb
29°
High: 39°
Avg: 29°
Low: 19°
Mar
40°
High: 50°
Avg: 40°
Low: 29°
Apr
49°
High: 60°
Avg: 49°
Low: 38°
May
56°
High: 67°
Avg: 56°
Low: 45°
Jun
62°
High: 74°
Avg: 62°
Low: 50°
Jul
61°
High: 72°
Avg: 61°
Low: 49°
Aug
52°
High: 63°
Avg: 52°
Low: 41°
Sep
41°
High: 51°
Avg: 41°
Low: 32°
Oct
29°
High: 38°
Avg: 29°
Low: 21°
Nov
22°
High: 30°
Avg: 22°
Low: 14°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 4.3"
0.0"
0.00"
Jan
0.0"
0.00"
Feb
0.2"
0.20"
Mar
0.8"
0.80"
Apr
2.7"
2.70"
May
4.3"
4.30"
Jun
2.2"
2.20"
Jul
2.0"
2.00"
Aug
1.3"
1.30"
Sep
0.1"
0.10"
Oct
0.3"
0.30"
Nov
0.0"
0.00"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8h10h12h14h15h16h16h14h12h10h9h8h
Jan: 7:55 AM – 4:05 PM · 8h 09m
Feb: 7:08 AM – 4:52 PM · 9h 44m
Mar: 6:14 AM – 5:46 PM · 11h 32m
Apr: 5:13 AM – 6:47 PM · 13h 35m
May: 4:20 AM – 7:40 PM · 15h 19m
Jun: 3:51 AM – 8:09 PM · 16h 18m
Jul: 4:03 AM – 7:57 PM · 15h 54m
Aug: 4:49 AM – 7:11 PM · 14h 22m
Sep: 5:49 AM – 6:11 PM · 12h 22m
Oct: 6:48 AM – 5:12 PM · 10h 23m
Nov: 7:42 AM – 4:18 PM · 8h 36m
Dec: 8:09 AM – 3:51 PM · 7h 42m
Daylight Longest: 16h 20m · Shortest: 7h 40m

Nearby Stations

Springbank A, Canada June 6 - August 23 Calgary Int'L A, Canada May 21 - September 17 Calgary Int'L Cs, Canada May 17 - September 23 Okotoks, Canada May 23 - September 13 Madden, Canada May 26 - September 7 Kananaskis, Canada June 16 - August 15

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