Frost Dates for Ishpeming, MI

Based on data from Ishpeming Wwtp weather station, 1 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 26
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 25
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 31
First Fall Frost September 17

Hard Freeze (28°F)

Last Spring Hard Freeze May 12
First Fall Hard Freeze October 7
46.49°N, -87.67°W © OpenStreetMap

Growing Season

122 Days May 26 to September 25

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 4b

Avg. annual minimum: −25 to −20°F (−32 to −29°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

0° 20° 40° 60° 80°
14°
High: 22°F
Avg: 14°F
Low: 6°F
Jan
15°
High: 25°F
Avg: 15°F
Low: 6°F
Feb
24°
High: 36°F
Avg: 24°F
Low: 12°F
Mar
36°
High: 47°F
Avg: 36°F
Low: 25°F
Apr
50°
High: 62°F
Avg: 50°F
Low: 38°F
May
61°
High: 72°F
Avg: 61°F
Low: 49°F
Jun
65°
High: 78°F
Avg: 65°F
Low: 53°F
Jul
63°
High: 76°F
Avg: 63°F
Low: 51°F
Aug
56°
High: 68°F
Avg: 56°F
Low: 44°F
Sep
43°
High: 53°F
Avg: 43°F
Low: 33°F
Oct
30°
High: 38°F
Avg: 30°F
Low: 23°F
Nov
20°
High: 27°F
Avg: 20°F
Low: 12°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 4.8"
1.2"
1.24"
Jan
1.2"
1.17"
Feb
1.5"
1.54"
Mar
2.8"
2.83"
Apr
3.7"
3.74"
May
4.8"
4.84"
Jun
4.7"
4.65"
Jul
4.8"
4.79"
Aug
4.5"
4.48"
Sep
3.7"
3.69"
Oct
1.8"
1.79"
Nov
1.6"
1.55"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h15h15.5h15.5h14h12.5h10.5h9h8.5h
Jan: 7:37 AM – 4:23 PM · 8h 46m
Feb: 6:58 AM – 5:02 PM · 10h 05m
Mar: 6:12 AM – 5:48 PM · 11h 36m
Apr: 5:20 AM – 6:40 PM · 13h 20m
May: 4:36 AM – 7:24 PM · 14h 48m
Jun: 4:12 AM – 7:48 PM · 15h 36m
Jul: 4:22 AM – 7:38 PM · 15h 16m
Aug: 5:00 AM – 6:60 PM · 13h 60m
Sep: 5:51 AM – 6:09 PM · 12h 19m
Oct: 6:41 AM – 5:19 PM · 10h 38m
Nov: 7:26 AM – 4:34 PM · 9h 08m
Dec: 7:48 AM – 4:12 PM · 8h 24m
Daylight Longest: 15h 38m · Shortest: 8h 23m

Nearby Stations

Marquette, MI May 22 - September 29 Clarksburg, MI June 5 - September 10 Champion Van Riper Pk, MI Marquette, MIMay 8 - October 21 Ki Sawyer Wwtp, MI May 13 - October 2 Big Bay 1nw, MIMay 22 - October 6

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