Frost Dates for Thompson Zoo, 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 9
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 13
First Fall Frost September 5

Hard Freeze (−2°C)

Last Spring Hard Freeze May 23
First Fall Hard Freeze September 23
55.75°N, -97.87°W © OpenStreetMap

Growing Season

91 Days June 9 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 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°
-23°
High: -18°C
Avg: -23°C
Low: -29°C
Jan
-19°
High: -13°C
Avg: -19°C
Low: -26°C
Feb
-12°
High: -4°C
Avg: -12°C
Low: -20°C
Mar
-2°
High: 5°C
Avg: -2°C
Low: -9°C
Apr
6°
High: 13°C
Avg: 6°C
Low: 0°C
May
13°
High: 20°C
Avg: 13°C
Low: 7°C
Jun
17°
High: 24°C
Avg: 17°C
Low: 11°C
Jul
16°
High: 22°C
Avg: 16°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
-11°
High: -7°C
Avg: -11°C
Low: -15°C
Nov
-19°
High: -14°C
Avg: -19°C
Low: -24°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
10 mm
10.2 mm
Jan
5 mm
5.1 mm
Feb
15 mm
15.2 mm
Mar
23 mm
22.9 mm
Apr
46 mm
45.7 mm
May
81 mm
81.3 mm
Jun
81 mm
81.3 mm
Jul
84 mm
83.8 mm
Aug
74 mm
73.7 mm
Sep
46 mm
45.7 mm
Oct
23 mm
22.9 mm
Nov
5 mm
5.1 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec7.5h9.5h11.5h14h16h17h16.5h15h12.5h10h8h7h
Jan: 8:19 AM – 3:41 PM · 7h 21m
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 60m
Jun: 3:23 AM – 8:37 PM · 17h 14m
Jul: 3:38 AM – 8:22 PM · 16h 43m
Aug: 4:36 AM – 7:24 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 55m
Dec: 8:37 AM – 3:23 PM · 6h 45m
Daylight Longest: 17h 17m · Shortest: 6h 44m

Nearby Stations

Thompson A, MBJune 11 - August 20 Kelsey Dam Cs, MB June 10 - August 21 Cross Lake Jenpeg, MB May 21 - September 27

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