Frost dates 2026–2027

Frost dates for Muskegon, Michigan

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Muskegon County Airport, 4.0 mi away (close match).

Last spring frostApr 30
First fall frostOct 19
170 frost-free days
Last spring frostApr 301 year in 10 after May 18
First fall frostOct 191 year in 10 by Oct 2
Growing season170 daysbetween median 32°F dates
Hardiness zoneZone 6b−5 to 0°F average extreme low

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Will it freeze in Muskegon in the next 7 nights?

No overnight lows at or below 32°F are forecast in Muskegon during the next 7 nights in the available NWS frost forecast.

Tonight: forecast low 39°F. Above 36°F.

NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.

No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.

Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.

Frost and freeze probabilities

Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.

These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.

Average first hard freeze in Muskegon

The median first fall hard-freeze date (28°F) is November 2, from NOAA’s 1991–2020 Climate Normals at Muskegon County Airport. This is the 50% probability date, not a forecast for this year.

TemperatureLast spring date
90% · 50% · 10% chance of a later freeze
First fall date
10% · 50% · 90% chance of an earlier freeze
Season
36°F frost possible Apr 28 · May 12 · May 27 Sep 24 · Oct 6 · Oct 19 148 days
32°F freeze Apr 17 · Apr 30 · May 18 Oct 2 · Oct 19 · Nov 3 170 days
28°F hard freeze Apr 4 · Apr 19 · May 7 Oct 17 · Nov 2 · Nov 19 198 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USW00014840. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Muskegon County Airport

Average low temperature by month

Months with lows near or below freezing carry frost risk

Where these frost dates come from

The frost dates for Muskegon, MI come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Muskegon County Airport (station USW00014840, elevation 625 ft), 4.0 mi from Muskegon. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.

Frost dates near Muskegon

CityDistanceLast spring frostFirst fall frost
Muskegon Heights, MI 1.9 mi Apr 30 Oct 19
Norton Shores, MI 4.3 mi Apr 30 Oct 19
Grand Haven, MI 12 mi Apr 30 Oct 24
Walker, MI 30 mi May 6 Oct 10
Zeeland, MI 31 mi Apr 28 Oct 21
Hudsonville, MI 32 mi May 6 Oct 10
Holland, MI 33 mi Apr 28 Oct 21
Grandville, MI 34 mi May 6 Oct 10
Grand Rapids, MI 35 mi May 6 Oct 10
Rockford, MI 36 mi May 14 Sep 29

Frequently asked questions

When is the last frost in Muskegon?

On average, the last spring frost (32°F) in Muskegon is around April 30. In about 1 year in 10 it comes after May 18, and in 9 years in 10 it comes after April 17.

When is the first frost in Muskegon?

The first fall frost (32°F) usually arrives around October 19. There’s a 10% chance of a freeze by October 2 and a 90% chance by November 3.

Can it frost in Muskegon after the last frost date?

Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after May 12.

What growing zone is Muskegon?

Muskegon is in USDA Plant Hardiness Zone 6b (average annual extreme minimum temperature −5 to 0°F), based on the 2023 USDA map for ZIP code 49440. See growing zones in Michigan.

More: all Michigan frost dates · Michigan growing zones · UV index today in Muskegon · frost vs. freeze