Frost Dates for Thompson A, MB

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 11
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 20
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 8

Hard Freeze (−2°C)

Last Spring Hard Freeze May 31
First Fall Hard Freeze September 9
55.80°N, -97.87°W © OpenStreetMap

Growing Season

70 Days June 11 to August 20

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 2a

Avg. annual minimum: −50 to −45°F (−46 to −43°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°
-24°
High: -18°C
Avg: -24°C
Low: -29°C
Jan
-20°
High: -13°C
Avg: -20°C
Low: -27°C
Feb
-13°
High: -5°C
Avg: -13°C
Low: -21°C
Mar
-2°
High: 5°C
Avg: -2°C
Low: -9°C
Apr
6°
High: 13°C
Avg: 6°C
Low: -1°C
May
13°
High: 20°C
Avg: 13°C
Low: 6°C
Jun
16°
High: 23°C
Avg: 16°C
Low: 9°C
Jul
15°
High: 21°C
Avg: 15°C
Low: 8°C
Aug
8°
High: 15°C
Avg: 8°C
Low: 2°C
Sep
0°
High: 5°C
Avg: 0°C
Low: -4°C
Oct
-11°
High: -7°C
Avg: -11°C
Low: -16°C
Nov
-21°
High: -16°C
Avg: -21°C
Low: -26°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
3 mm
2.5 mm
Jan
3 mm
2.5 mm
Feb
8 mm
7.6 mm
Mar
10 mm
10.2 mm
Apr
46 mm
45.7 mm
May
61 mm
61.0 mm
Jun
89 mm
88.9 mm
Jul
91 mm
91.4 mm
Aug
66 mm
66.0 mm
Sep
38 mm
38.1 mm
Oct
20 mm
20.3 mm
Nov
0 mm
0.0 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec7.5h9.5h11.5h14h16h17h16.5h15h12.5h10h8h6.5h
Jan: 8:20 AM – 3:40 PM · 7h 20m
Feb: 7:21 AM – 4:39 PM · 9h 17m
Mar: 6:17 AM – 5:43 PM · 11h 27m
Apr: 5:04 AM – 6:56 PM · 13h 53m
May: 3:60 AM – 8:00 PM · 16h 00m
Jun: 3:23 AM – 8:37 PM · 17h 15m
Jul: 3:38 AM – 8:22 PM · 16h 44m
Aug: 4:35 AM – 7:25 PM · 14h 49m
Sep: 5:47 AM – 6:13 PM · 12h 26m
Oct: 6:58 AM – 5:02 PM · 10h 05m
Nov: 8:03 AM – 3:57 PM · 7h 54m
Dec: 8:38 AM – 3:22 PM · 6h 45m
Daylight Longest: 17h 17m · Shortest: 6h 43m

Nearby Stations

Thompson Zoo, MB June 9 - September 8 Kelsey Dam Cs, MB June 10 - August 21 Cross Lake Jenpeg, MB May 21 - September 27

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