Frost dates 2026–2027

Frost dates for Allen Park, Michigan

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Dearborn, 4.3 mi away (close match).

Last spring frostMay 1
First fall frostOct 15
166 frost-free days
Last spring frostMay 11 year in 10 after May 18
First fall frostOct 151 year in 10 by Oct 1
Growing season166 daysbetween median 32°F dates
Hardiness zoneZone 6b−5 to 0°F average extreme low

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Will it freeze in Allen Park in the next 7 nights?

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

Tonight: forecast low 42°F. Above 36°F.

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

1 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.

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 Allen Park

The median first fall hard-freeze date (28°F) is October 28, from NOAA’s 1991–2020 Climate Normals at Dearborn. 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 27 · May 12 · May 27 Sep 24 · Oct 5 · Oct 18 146 days
32°F freeze Apr 17 · May 1 · May 18 Oct 1 · Oct 15 · Oct 28 166 days
28°F hard freeze Apr 5 · Apr 20 · May 7 Oct 13 · Oct 28 · Nov 12 190 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00202015. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Dearborn

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 Allen Park, MI come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Dearborn (station USC00202015, elevation 605 ft), 4.3 mi from Allen Park. 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 Allen Park

CityDistanceLast spring frostFirst fall frost
Lincoln Park, MI 1.9 mi May 1 Oct 15
Melvindale, MI 1.9 mi May 1 Oct 15
Ecorse, MI 3.7 mi May 1 Oct 15
Dearborn, MI 3.7 mi May 1 Oct 15
Taylor, MI 3.7 mi Apr 20 Oct 27
Southgate, MI 3.7 mi Apr 20 Oct 27
Wyandotte, MI 4.3 mi May 1 Oct 15
River Rouge, MI 4.3 mi Apr 27 Oct 25
Riverview, MI 6.2 mi Apr 20 Oct 27
Inkster, MI 6.2 mi Apr 20 Oct 27

Frequently asked questions

When is the last frost in Allen Park?

On average, the last spring frost (32°F) in Allen Park is around May 1. 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 Allen Park?

The first fall frost (32°F) usually arrives around October 15. There’s a 10% chance of a freeze by October 1 and a 90% chance by October 28.

Can it frost in Allen Park 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 Allen Park?

Allen Park 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 48101. See growing zones in Michigan.

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