Frost Dates for Bighorn Dam, 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 10
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 18
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 16
First Fall Frost August 6

Hard Freeze (−2°C)

Last Spring Hard Freeze May 19
First Fall Hard Freeze September 14
52.32°N, -116.33°W © OpenStreetMap

Growing Season

69 Days June 10 to August 18

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°
-8°
High: -1°C
Avg: -8°C
Low: -14°C
Jan
-5°
High: 2°C
Avg: -5°C
Low: -12°C
Feb
-3°
High: 4°C
Avg: -3°C
Low: -9°C
Mar
3°
High: 9°C
Avg: 3°C
Low: -4°C
Apr
7°
High: 14°C
Avg: 7°C
Low: 1°C
May
11°
High: 18°C
Avg: 11°C
Low: 5°C
Jun
15°
High: 22°C
Avg: 15°C
Low: 7°C
Jul
14°
High: 21°C
Avg: 14°C
Low: 6°C
Aug
9°
High: 17°C
Avg: 9°C
Low: 2°C
Sep
3°
High: 10°C
Avg: 3°C
Low: -3°C
Oct
-2°
High: 3°C
Avg: -2°C
Low: -8°C
Nov
-7°
High: -1°C
Avg: -7°C
Low: -12°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
8 mm
7.6 mm
Mar
25 mm
25.4 mm
Apr
64 mm
63.5 mm
May
94 mm
94.0 mm
Jun
66 mm
66.0 mm
Jul
69 mm
68.6 mm
Aug
53 mm
53.3 mm
Sep
25 mm
25.4 mm
Oct
8 mm
7.6 mm
Nov
10 mm
10.2 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8h9.5h11.5h13.5h15.5h16.5h16h14.5h12.5h10.5h8.5h7.5h
Jan: 8:01 AM – 3:59 PM · 7h 58m
Feb: 7:11 AM – 4:49 PM · 9h 38m
Mar: 6:15 AM – 5:45 PM · 11h 31m
Apr: 5:10 AM – 6:50 PM · 13h 39m
May: 4:15 AM – 7:45 PM · 15h 29m
Jun: 3:44 AM – 8:16 PM · 16h 31m
Jul: 3:57 AM – 8:03 PM · 16h 06m
Aug: 4:46 AM – 7:14 PM · 14h 28m
Sep: 5:49 AM – 6:11 PM · 12h 23m
Oct: 6:51 AM – 5:09 PM · 10h 19m
Nov: 7:47 AM – 4:13 PM · 8h 26m
Dec: 8:16 AM – 3:44 PM · 7h 28m
Daylight Longest: 16h 33m · Shortest: 7h 27m

Nearby Stations

Nordegg Cs, ABJune 16 - August 13 Yoho Park, BCJune 21 - August 4 Golden A, BCMay 14 - September 24 Violet Grove Cs, AB May 17 - September 19 Banff Cs, ABJune 15 - August 16 Glacier Np Rogers Pass, BC June 4 - September 4

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