Frost Dates for Grosse Ile, MI

Based on data from Amherstburg weather station, 3 miles away

Elevation: 597 ft

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. April 29
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. October 22
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 5
First Fall Frost October 17

Hard Freeze (−2°C)

Last Spring Hard Freeze April 10
First Fall Hard Freeze November 8
42.13°N, -83.14°W © OpenStreetMap

Growing Season

176 Days April 29 to October 22

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 6b

Avg. annual minimum: −5 to 0°F (−21 to −18°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Dfa Hot-Summer Continental

Hot summers and cold winters with year-round precipitation. Moderate growing season supports warm-season crops like tomatoes, peppers, and corn. Winter protection extends the harvest.

Köppen climate map

Temperature

-10° 0° 10° 20° 30°
-3°
High: 0°C
Avg: -3°C
Low: -7°C
Jan
-1°
High: 3°C
Avg: -1°C
Low: -5°C
Feb
3°
High: 7°C
Avg: 3°C
Low: -2°C
Mar
9°
High: 14°C
Avg: 9°C
Low: 3°C
Apr
15°
High: 21°C
Avg: 15°C
Low: 10°C
May
21°
High: 27°C
Avg: 21°C
Low: 16°C
Jun
24°
High: 29°C
Avg: 24°C
Low: 18°C
Jul
23°
High: 28°C
Avg: 23°C
Low: 17°C
Aug
19°
High: 24°C
Avg: 19°C
Low: 13°C
Sep
12°
High: 16°C
Avg: 12°C
Low: 7°C
Oct
5°
High: 9°C
Avg: 5°C
Low: 1°C
Nov
0°
High: 3°C
Avg: 0°C
Low: -4°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
76 mm
76.2 mm
Jan
61 mm
61.0 mm
Feb
66 mm
66.0 mm
Mar
94 mm
94.0 mm
Apr
94 mm
94.0 mm
May
76 mm
76.2 mm
Jun
69 mm
68.6 mm
Jul
76 mm
76.2 mm
Aug
81 mm
81.3 mm
Sep
64 mm
63.5 mm
Oct
79 mm
78.7 mm
Nov
61 mm
61.0 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14.5h15h15h13.5h12.5h11h9.5h9h
Jan: 8:04 AM – 5:19 PM · 9h 15m
Feb: 7:36 AM – 5:58 PM · 10h 21m
Mar: 7:52 AM – 7:32 PM · 11h 40m
Apr: 6:58 AM – 8:07 PM · 13h 09m
May: 6:17 AM – 8:40 PM · 14h 23m
Jun: 6:01 AM – 9:04 PM · 15h 03m
Jul: 6:15 AM – 9:01 PM · 14h 47m
Aug: 6:45 AM – 8:28 PM · 13h 42m
Sep: 7:19 AM – 7:35 PM · 12h 16m
Oct: 7:53 AM – 6:42 PM · 10h 50m
Nov: 7:31 AM – 5:04 PM · 9h 34m
Dec: 7:60 AM – 4:56 PM · 8h 56m
Daylight Eastern Time (ET) Longest: 15h 05m · Shortest: 8h 55m

Nearby Stations

Harrow Cda Auto, ON April 26 - October 26 Newport 4sse, MI April 27 - October 22 Windsor A, ON April 16 - November 1 Detroit Metro AP, MI April 20 - October 27 Dearborn, MIMay 1 - October 15 Carleton 2w, MI April 27 - October 20

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