Frost Dates for Bow Valley, 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. June 13
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. August 9
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 June 20
First Fall Frost July 29

Hard Freeze (−2°C)

Last Spring Hard Freeze May 28
First Fall Hard Freeze September 10
51.08°N, -115.07°W © OpenStreetMap

Growing Season

57 Days June 13 to August 9

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 3b

Avg. annual minimum: −35 to −30°F (−37 to −34°C)

Learn more

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

Dfc Subarctic

Short, cool summers and long, very cold winters. Growing seasons of 3–4 months require fast-maturing varieties. Root vegetables, potatoes, and cold-hardy greens are the most reliable.

Köppen climate map

Temperature

-15° -5° 5° 15° 25°
-6°
High: -1°C
Avg: -6°C
Low: -12°C
Jan
-5°
High: 1°C
Avg: -5°C
Low: -11°C
Feb
-2°
High: 4°C
Avg: -2°C
Low: -8°C
Mar
3°
High: 9°C
Avg: 3°C
Low: -4°C
Apr
8°
High: 15°C
Avg: 8°C
Low: 1°C
May
12°
High: 19°C
Avg: 12°C
Low: 5°C
Jun
16°
High: 24°C
Avg: 16°C
Low: 7°C
Jul
15°
High: 23°C
Avg: 15°C
Low: 6°C
Aug
10°
High: 18°C
Avg: 10°C
Low: 3°C
Sep
5°
High: 10°C
Avg: 5°C
Low: -1°C
Oct
-2°
High: 3°C
Avg: -2°C
Low: -7°C
Nov
-6°
High: -2°C
Avg: -6°C
Low: -11°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 50 mm 100 mm
3 mm
2.5 mm
Jan
5 mm
5.1 mm
Feb
18 mm
17.8 mm
Mar
25 mm
25.4 mm
Apr
66 mm
66.0 mm
May
104 mm
104.1 mm
Jun
33 mm
33.0 mm
Jul
53 mm
53.3 mm
Aug
51 mm
50.8 mm
Sep
30 mm
30.5 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: 7:55 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

Kananaskis, ABJune 16 - August 15 Nakiska Ridgetop, AB June 23 - July 19 Banff Cs, ABJune 15 - August 16 Springbank A, AB June 6 - August 23 Cop Upper, AB May 18 - September 21 Madden, ABMay 26 - September 7

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