Frost Dates for Coalhurst, Canada

Based on data from Lethbridge Cda weather station, 8 miles away

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 12
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 24
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 16
First Fall Frost September 18

Hard Freeze (−2°C)

Last Spring Hard Freeze April 28
First Fall Hard Freeze October 2
49.75°N, -112.93°W © OpenStreetMap

Growing Season

135 Days May 12 to September 24

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.

BSk Cold Semi-Arid (Steppe)

Cool to cold with low rainfall and wide temperature swings. Common in the western Great Plains and central Asia. Short growing seasons benefit from season extension techniques.

Köppen climate map

Temperature

-15° 0° 15° 30°
-5°
High: 0°C
Avg: -5°C
Low: -11°C
Jan
-4°
High: 2°C
Avg: -4°C
Low: -10°C
Feb
0°
High: 6°C
Avg: 0°C
Low: -6°C
Mar
6°
High: 12°C
Avg: 6°C
Low: -1°C
Apr
11°
High: 18°C
Avg: 11°C
Low: 5°C
May
16°
High: 22°C
Avg: 16°C
Low: 9°C
Jun
19°
High: 27°C
Avg: 19°C
Low: 12°C
Jul
18°
High: 26°C
Avg: 18°C
Low: 11°C
Aug
14°
High: 21°C
Avg: 14°C
Low: 6°C
Sep
7°
High: 13°C
Avg: 7°C
Low: 0°C
Oct
0°
High: 6°C
Avg: 0°C
Low: -6°C
Nov
-5°
High: 0°C
Avg: -5°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 30 mm 60 mm 90 mm
0 mm
0.0 mm
Jan
0 mm
0.0 mm
Feb
0 mm
0.0 mm
Mar
5 mm
5.1 mm
Apr
51 mm
50.8 mm
May
89 mm
88.9 mm
Jun
20 mm
20.3 mm
Jul
15 mm
15.2 mm
Aug
18 mm
17.8 mm
Sep
5 mm
5.1 mm
Oct
0 mm
0.0 mm
Nov
0 mm
0.0 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8.5h10h11.5h13.5h15h16h15.5h14h12.5h10.5h9h8h
Jan: 7:49 AM – 4:11 PM · 8h 21m
Feb: 7:05 AM – 4:55 PM · 9h 51m
Mar: 6:13 AM – 5:47 PM · 11h 33m
Apr: 5:15 AM – 6:45 PM · 13h 30m
May: 4:25 AM – 7:35 PM · 15h 09m
Jun: 3:58 AM – 8:02 PM · 16h 04m
Jul: 4:09 AM – 7:51 PM · 15h 42m
Aug: 4:53 AM – 7:07 PM · 14h 15m
Sep: 5:50 AM – 6:10 PM · 12h 21m
Oct: 6:46 AM – 5:14 PM · 10h 28m
Nov: 7:37 AM – 4:23 PM · 8h 47m
Dec: 8:02 AM – 3:58 PM · 7h 55m
Daylight Longest: 16h 06m · Shortest: 7h 54m

Nearby Stations

Monarch, Canada May 25 - September 10 Vauxhall Cda Cs, Canada May 14 - September 20 Cardston, Canada May 18 - September 19 Claresholm, Canada May 20 - September 14 Brocket Agdm, Canada May 14 - September 21 Del Bonita, MT May 28 - September 16

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