Frost dates 2026–2027

Frost dates for Walled Lake, Michigan

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Farmington, 7.5 mi away (close match).

Last spring frostMay 1
First fall frostOct 17
165 frost-free days
Last spring frostMay 11 year in 10 after May 16
First fall frostOct 171 year in 10 by Oct 1
Growing season165 daysbetween median 32°F dates
Hardiness zoneZone 6a−10 to −5°F average extreme low

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Will it freeze in Walled Lake in the next 7 nights?

The earliest overnight low at or below 32°F in the available NWS frost forecast is Sat, Nov 7: 32°F (Sat, Nov 7, 6:00 PM EST to Sun, Nov 8, 6:00 AM EST).

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.

5 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 Walled Lake

The median first fall hard-freeze date (28°F) is October 27, from NOAA’s 1991–2020 Climate Normals at Farmington. 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 30 · May 13 · May 27 Sep 23 · Oct 4 · Oct 17 144 days
32°F freeze Apr 19 · May 1 · May 16 Oct 1 · Oct 17 · Oct 29 165 days
28°F hard freeze Apr 8 · Apr 22 · May 5 Oct 15 · Oct 27 · Nov 8 187 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00202691. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Farmington

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 Walled Lake, MI come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Farmington (station USC00202691, elevation 720 ft), 7.5 mi from Walled Lake. 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 Walled Lake

CityDistanceLast spring frostFirst fall frost
Wixom, MI 3.1 mi May 6 Oct 12
Novi, MI 4.3 mi May 1 Oct 17
Farmington Hills, MI 6.2 mi May 1 Oct 17
Northville, MI 6.8 mi May 1 Oct 17
Farmington, MI 6.8 mi May 1 Oct 17
Milford, MI 7.5 mi May 6 Oct 12
South Lyon, MI 11 mi May 5 Oct 13
Livonia, MI 11 mi May 1 Oct 17
Plymouth, MI 11 mi May 1 Oct 17
Southfield, MI 12 mi May 1 Oct 17

Frequently asked questions

When is the last frost in Walled Lake?

On average, the last spring frost (32°F) in Walled Lake is around May 1. In about 1 year in 10 it comes after May 16, and in 9 years in 10 it comes after April 19.

When is the first frost in Walled Lake?

The first fall frost (32°F) usually arrives around October 17. There’s a 10% chance of a freeze by October 1 and a 90% chance by October 29.

Can it frost in Walled Lake 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 13.

What growing zone is Walled Lake?

Walled Lake is in USDA Plant Hardiness Zone 6a (average annual extreme minimum temperature −10 to −5°F), based on the 2023 USDA map for ZIP code 48390. See growing zones in Michigan.

More: all Michigan frost dates · Michigan growing zones · frost vs. freeze