Frost Dates for Fort Smith, Canada

Based on data from Fort Smith A weather station, 3 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 30
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 8
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 4
First Fall Frost September 3

Hard Freeze (−2°C)

Last Spring Hard Freeze May 17
First Fall Hard Freeze September 21
60.00°N, -111.89°W © OpenStreetMap

Growing Season

101 Days May 30 to September 8

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 2b

Avg. annual minimum: −45 to −40°F (−43 to −40°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

-30° -15° 0° 15°
-22°
High: -18°C
Avg: -22°C
Low: -27°C
Jan
-18°
High: -13°C
Avg: -18°C
Low: -24°C
Feb
-12°
High: -6°C
Avg: -12°C
Low: -19°C
Mar
-1°
High: 6°C
Avg: -1°C
Low: -7°C
Apr
8°
High: 15°C
Avg: 8°C
Low: 2°C
May
15°
High: 22°C
Avg: 15°C
Low: 8°C
Jun
18°
High: 24°C
Avg: 18°C
Low: 11°C
Jul
15°
High: 21°C
Avg: 15°C
Low: 9°C
Aug
9°
High: 14°C
Avg: 9°C
Low: 4°C
Sep
1°
High: 5°C
Avg: 1°C
Low: -3°C
Oct
-10°
High: -7°C
Avg: -10°C
Low: -14°C
Nov
-19°
High: -15°C
Avg: -19°C
Low: -23°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
0 mm
0.0 mm
Jan
0 mm
0.0 mm
Feb
0 mm
0.0 mm
Mar
0 mm
0.0 mm
Apr
18 mm
17.8 mm
May
46 mm
45.7 mm
Jun
61 mm
61.0 mm
Jul
56 mm
55.9 mm
Aug
46 mm
45.7 mm
Sep
15 mm
15.2 mm
Oct
3 mm
2.5 mm
Nov
0 mm
0.0 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec6.5h9h11.5h14h17h18.5h17.5h15.5h12.5h9.5h7h5.5h
Jan: 8:50 AM – 3:10 PM · 6h 21m
Feb: 7:37 AM – 4:23 PM · 8h 47m
Mar: 6:20 AM – 5:40 PM · 11h 21m
Apr: 4:53 AM – 7:07 PM · 14h 14m
May: 3:35 AM – 8:25 PM · 16h 49m
Jun: 2:47 AM – 9:13 PM · 18h 27m
Jul: 3:08 AM – 8:52 PM · 17h 45m
Aug: 4:19 AM – 7:41 PM · 15h 21m
Sep: 5:45 AM – 6:15 PM · 12h 31m
Oct: 7:08 AM – 4:52 PM · 9h 44m
Nov: 8:28 AM – 3:32 PM · 7h 04m
Dec: 9:14 AM – 2:46 PM · 5h 33m
Daylight Longest: 18h 30m · Shortest: 5h 30m

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