Frost Dates for Rocky Mountain House, AB

Based on data from Rocky Mtn House (Aut) weather station, 3 miles away

Elevation: 982 m

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 8
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 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 June 15
First Fall Frost August 13

Hard Freeze (−2°C)

Last Spring Hard Freeze May 21
First Fall Hard Freeze September 18
52.37°N, -114.92°W © OpenStreetMap

Growing Season

76 Days June 8 to August 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 3a

Avg. annual minimum: −40 to −35°F (−40 to −37°C)

Learn more

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

Dfb Warm-Summer Continental

Warm summers and cold, snowy winters. A shorter growing season than hot-summer continental. Hardy vegetables, root crops, and cool-season greens do well. Season extension is valuable.

Köppen climate map

Temperature

-20° -5° 10° 25°
-11°
High: -5°C
Avg: -11°C
Low: -18°C
Jan
-9°
High: -2°C
Avg: -9°C
Low: -17°C
Feb
-5°
High: 1°C
Avg: -5°C
Low: -12°C
Mar
2°
High: 9°C
Avg: 2°C
Low: -4°C
Apr
8°
High: 16°C
Avg: 8°C
Low: 1°C
May
12°
High: 19°C
Avg: 12°C
Low: 5°C
Jun
15°
High: 22°C
Avg: 15°C
Low: 8°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: -4°C
Oct
-5°
High: 1°C
Avg: -5°C
Low: -11°C
Nov
-10°
High: -4°C
Avg: -10°C
Low: -17°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
0 mm
0.0 mm
Feb
3 mm
2.5 mm
Mar
10 mm
10.2 mm
Apr
53 mm
53.3 mm
May
107 mm
106.7 mm
Jun
94 mm
94.0 mm
Jul
66 mm
66.0 mm
Aug
53 mm
53.3 mm
Sep
13 mm
12.7 mm
Oct
3 mm
2.5 mm
Nov
3 mm
2.5 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8h9.5h11.5h13.5h15.5h16.5h16h14.5h12.5h10.5h8.5h7.5h
Jan: 8:51 AM – 4:47 PM · 7h 57m
Feb: 8:06 AM – 5:43 PM · 9h 37m
Mar: 8:04 AM – 7:35 PM · 11h 31m
Apr: 6:50 AM – 8:30 PM · 13h 40m
May: 5:51 AM – 9:21 PM · 15h 30m
Jun: 5:24 AM – 9:56 PM · 16h 32m
Jul: 5:42 AM – 9:49 PM · 16h 07m
Aug: 6:29 AM – 8:58 PM · 14h 29m
Sep: 7:23 AM – 7:46 PM · 12h 23m
Oct: 8:16 AM – 6:34 PM · 10h 18m
Nov: 8:12 AM – 4:38 PM · 8h 25m
Dec: 8:52 AM – 4:19 PM · 7h 27m
Daylight Mountain Time (MT) Longest: 16h 34m · Shortest: 7h 26m

Nearby Stations

Eckville South, AB May 22 - September 12 Sundre A, ABJune 9 - August 25 Red Deer A, AB May 23 - September 12 Dakota West, AB May 26 - September 14 Red Deer, ABMay 18 - September 19 Lacombe Cda 2, AB May 24 - September 15

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