Frost Dates for Rockglen (Aut), 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 19
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 23
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 23
First Fall Frost September 18

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 8
First Fall Hard Freeze October 1
49.17°N, -105.98°W © OpenStreetMap

Growing Season

127 Days May 19 to September 23

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

Learn more

Temperature

0° 20° 40° 60° 80°
14°
High: 22°
Avg: 14°
Low: 5°
Jan
14°
High: 23°
Avg: 14°
Low: 6°
Feb
26°
High: 34°
Avg: 26°
Low: 16°
Mar
39°
High: 50°
Avg: 39°
Low: 28°
Apr
51°
High: 62°
Avg: 51°
Low: 39°
May
59°
High: 70°
Avg: 59°
Low: 48°
Jun
67°
High: 79°
Avg: 67°
Low: 54°
Jul
65°
High: 78°
Avg: 65°
Low: 53°
Aug
55°
High: 67°
Avg: 55°
Low: 44°
Sep
41°
High: 51°
Avg: 41°
Low: 31°
Oct
27°
High: 36°
Avg: 27°
Low: 19°
Nov
16°
High: 24°
Avg: 16°
Low: 8°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 2.5"
0.0"
0.00"
Jan
0.0"
0.00"
Feb
0.2"
0.20"
Mar
0.9"
0.90"
Apr
2.5"
2.50"
May
2.3"
2.30"
Jun
1.3"
1.30"
Jul
1.1"
1.10"
Aug
0.9"
0.90"
Sep
0.6"
0.60"
Oct
0.3"
0.30"
Nov
0.3"
0.30"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8h10h12h13h15h16h16h14h12h10h9h8h
Jan: 7:47 AM – 4:13 PM · 8h 26m
Feb: 7:03 AM – 4:57 PM · 9h 53m
Mar: 6:13 AM – 5:47 PM · 11h 34m
Apr: 5:16 AM – 6:44 PM · 13h 28m
May: 4:27 AM – 7:33 PM · 15h 06m
Jun: 4:00 AM – 7:60 PM · 15h 59m
Jul: 4:11 AM – 7:49 PM · 15h 37m
Aug: 4:54 AM – 7:06 PM · 14h 12m
Sep: 5:50 AM – 6:10 PM · 12h 21m
Oct: 6:45 AM – 5:15 PM · 10h 30m
Nov: 7:35 AM – 4:25 PM · 8h 50m
Dec: 7:60 AM – 4:00 PM · 8h 00m
Daylight Longest: 16h 01m · Shortest: 7h 59m

Nearby Stations

Opheim 10 N, MT June 1 - September 7 Coronach, Canada May 24 - September 12 Coronach Spc, Canada May 26 - September 13 Scobey 4 Nw, MT May 28 - September 6 Opheim 12 Sse, MT June 5 - September 2 Assiniboia Airport, Canada May 21 - September 21

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