Frost Dates for St Ignace, MI

Elevation: 202 m

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. May 16
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. October 13

30% Probability

Only 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 22
First Fall Frost October 7

Hard Freeze (28°F)

Last Spring Hard Freeze May 4
First Fall Hard Freeze October 28
45.86°N, 84.72°W © OpenStreetMap

Growing Season

150 Days May 16 to October 13

USDA Hardiness Zone

Hardiness 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 5a

Avg. annual minimum: −20 to −15°F

Learn more

Köppen Climate

The 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

Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January25°18°11°
February26°18°10°
March35°27°18°
April47°38°29°
May59°50°40°
June70°61°51°
July76°66°57°
August75°66°56°
September68°59°50°
October55°47°39°
November42°36°30°
December32°26°20°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January1.9
February1.9
March3.0
April3.3
May3.8
June3.6
July4.3
August4.7
September5.1
October4.8
November3.7
December2.7

Sunrise / Sunset

Daylight Eastern Time (ET) Longest: 15h 32m · Shortest: 8h 28m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Eastern Time (ET))
Month Sunrise Sunset Daylight
January8:23 AM5:14 PM8h 51m
February7:50 AM5:57 PM10h 07m
March8:00 AM7:37 PM11h 37m
April6:60 AM8:18 PM13h 19m
May6:13 AM8:57 PM14h 44m
June5:54 AM9:25 PM15h 31m
July6:09 AM9:20 PM15h 12m
August6:44 AM8:42 PM13h 57m
September7:24 AM7:43 PM12h 18m
October8:04 AM6:44 PM10h 40m
November7:48 AM5:00 PM9h 12m
December8:20 AM4:49 PM8h 29m

Nearby Stations

St Ignace Mackinac Br, MI May 7 - October 23 Moran, MIMay 23 - September 30 Cheboygan, MIMay 11 - October 11 Pellston AP #2, MI May 21 - September 27 Cross Village 1e, MI May 15 - October 16 Pellston Rgnl AP, MI May 31 - September 18

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