Frost Dates for Spirit River Auto Station, 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. May 16
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 19
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 22
First Fall Frost September 7

Hard Freeze (−2°C)

Last Spring Hard Freeze May 7
First Fall Hard Freeze October 3
55.70°N, -119.23°W © OpenStreetMap

Growing Season

126 Days May 16 to September 19

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 4b

Avg. annual minimum: −25 to −20°F (−32 to −29°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: -4°C
Avg: -8°C
Low: -12°C
Jan
-7°
High: -3°C
Avg: -7°C
Low: -11°C
Feb
-5°
High: 0°C
Avg: -5°C
Low: -10°C
Mar
3°
High: 7°C
Avg: 3°C
Low: -2°C
Apr
9°
High: 14°C
Avg: 9°C
Low: 4°C
May
13°
High: 18°C
Avg: 13°C
Low: 8°C
Jun
15°
High: 20°C
Avg: 15°C
Low: 10°C
Jul
14°
High: 19°C
Avg: 14°C
Low: 9°C
Aug
10°
High: 15°C
Avg: 10°C
Low: 5°C
Sep
3°
High: 6°C
Avg: 3°C
Low: -1°C
Oct
-5°
High: -2°C
Avg: -5°C
Low: -8°C
Nov
-9°
High: -6°C
Avg: -9°C
Low: -13°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 20 mm 40 mm 60 mm
15 mm
15.2 mm
Jan
15 mm
15.2 mm
Feb
25 mm
25.4 mm
Mar
23 mm
22.9 mm
Apr
51 mm
50.8 mm
May
66 mm
66.0 mm
Jun
58 mm
58.4 mm
Jul
46 mm
45.7 mm
Aug
33 mm
33.0 mm
Sep
33 mm
33.0 mm
Oct
25 mm
25.4 mm
Nov
18 mm
17.8 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec7.5h9.5h11.5h14h16h17h16.5h15h12.5h10h8h7h
Jan: 8:19 AM – 3:41 PM · 7h 22m
Feb: 7:21 AM – 4:39 PM · 9h 18m
Mar: 6:17 AM – 5:43 PM · 11h 27m
Apr: 5:04 AM – 6:56 PM · 13h 53m
May: 4:00 AM – 7:60 PM · 15h 59m
Jun: 3:23 AM – 8:37 PM · 17h 13m
Jul: 3:39 AM – 8:21 PM · 16h 42m
Aug: 4:36 AM – 7:24 PM · 14h 49m
Sep: 5:47 AM – 6:13 PM · 12h 26m
Oct: 6:57 AM – 5:03 PM · 10h 05m
Nov: 8:02 AM – 3:58 PM · 7h 55m
Dec: 8:37 AM – 3:23 PM · 6h 46m
Daylight Longest: 17h 16m · Shortest: 6h 44m

Nearby Stations

Beaverlodge Rcs, AB May 20 - September 10 Grande Prairie A, AB May 21 - September 11 Fort St John A, BC May 11 - September 17

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