Frost Dates for Grand Rapids (Aut), 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 7
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 5
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 12
First Fall Frost August 22

Hard Freeze (−2°C)

Last Spring Hard Freeze May 27
First Fall Hard Freeze September 28
53.18°N, -99.27°W © OpenStreetMap

Growing Season

90 Days June 7 to September 5

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

-25° -10° 5° 20°
-18°
High: -13°C
Avg: -18°C
Low: -23°C
Jan
-17°
High: -11°C
Avg: -17°C
Low: -24°C
Feb
-10°
High: -3°C
Avg: -10°C
Low: -17°C
Mar
-1°
High: 6°C
Avg: -1°C
Low: -7°C
Apr
6°
High: 13°C
Avg: 6°C
Low: 0°C
May
13°
High: 20°C
Avg: 13°C
Low: 7°C
Jun
18°
High: 24°C
Avg: 18°C
Low: 11°C
Jul
16°
High: 23°C
Avg: 16°C
Low: 10°C
Aug
11°
High: 17°C
Avg: 11°C
Low: 5°C
Sep
3°
High: 8°C
Avg: 3°C
Low: -2°C
Oct
-7°
High: -2°C
Avg: -7°C
Low: -11°C
Nov
-16°
High: -11°C
Avg: -16°C
Low: -21°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 80 mm
10 mm
10.2 mm
Jan
3 mm
2.5 mm
Feb
13 mm
12.7 mm
Mar
15 mm
15.2 mm
Apr
36 mm
35.6 mm
May
74 mm
73.7 mm
Jun
71 mm
71.1 mm
Jul
79 mm
78.7 mm
Aug
66 mm
66.0 mm
Sep
33 mm
33.0 mm
Oct
15 mm
15.2 mm
Nov
3 mm
2.5 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8h9.5h11.5h13.5h15.5h16.5h16h14.5h12.5h10.5h8.5h7.5h
Jan: 8:05 AM – 3:55 PM · 7h 49m
Feb: 7:14 AM – 4:46 PM · 9h 33m
Mar: 6:15 AM – 5:45 PM · 11h 30m
Apr: 5:09 AM – 6:51 PM · 13h 42m
May: 4:12 AM – 7:48 PM · 15h 36m
Jun: 3:39 AM – 8:21 PM · 16h 41m
Jul: 3:53 AM – 8:07 PM · 16h 14m
Aug: 4:43 AM – 7:17 PM · 14h 33m
Sep: 5:48 AM – 6:12 PM · 12h 24m
Oct: 6:52 AM – 5:08 PM · 10h 16m
Nov: 7:51 AM – 4:09 PM · 8h 19m
Dec: 8:21 AM – 3:39 PM · 7h 18m
Daylight Longest: 16h 43m · Shortest: 7h 17m

Nearby Stations

Grand Rapids Hydro, MB May 25 - September 24 Cowan, MBJune 9 - August 25 Cross Lake Jenpeg, MB May 21 - September 27

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