Frost dates 2026–2027

Frost dates for Grand Rapids, Michigan

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at E Grand Rapids, 2.7 mi away (close match).

Last spring frostMay 6
First fall frostOct 10
157 frost-free days
Last spring frostMay 61 year in 10 after May 23
First fall frostOct 101 year in 10 by Sep 29
Growing season157 daysbetween median 32°F dates
Hardiness zoneZone 6a−10 to −5°F average extreme low

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Will it freeze in Grand Rapids in the next 7 nights?

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

Tonight: forecast low 38°F. Above 36°F.

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

3 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 Grand Rapids

The median first fall hard-freeze date (28°F) is October 23, from NOAA’s 1991–2020 Climate Normals at E Grand Rapids. 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 May 3 · May 18 · May 31 Sep 20 · Oct 1 · Oct 12 136 days
32°F freeze Apr 24 · May 6 · May 23 Sep 29 · Oct 10 · Oct 25 157 days
28°F hard freeze Apr 11 · Apr 27 · May 13 Oct 8 · Oct 23 · Nov 7 178 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00202375. How to read these probabilities.

Average high temperature by month

1991–2020 normals at E Grand Rapids

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 Grand Rapids, MI come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: E Grand Rapids (station USC00202375, elevation 746 ft), 2.7 mi from Grand Rapids. 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 Grand Rapids

CityDistanceLast spring frostFirst fall frost
East Grand Rapids, MI 2.5 mi May 6 Oct 10
Wyoming, MI 5.6 mi May 6 Oct 10
Walker, MI 5.6 mi May 6 Oct 10
Kentwood, MI 6.2 mi Apr 30 Oct 14
Grandville, MI 6.2 mi May 6 Oct 10
Hudsonville, MI 12 mi May 6 Oct 10
Rockford, MI 13 mi May 14 Sep 29
Zeeland, MI 21 mi Apr 28 Oct 21
Belding, MI 23 mi May 18 Sep 28
Greenville, MI 25 mi May 18 Sep 28

Frequently asked questions

When is the last frost in Grand Rapids?

On average, the last spring frost (32°F) in Grand Rapids is around May 6. In about 1 year in 10 it comes after May 23, and in 9 years in 10 it comes after April 24.

When is the first frost in Grand Rapids?

The first fall frost (32°F) usually arrives around October 10. There’s a 10% chance of a freeze by September 29 and a 90% chance by October 25.

Can it frost in Grand Rapids 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 18.

What growing zone is Grand Rapids?

Grand Rapids 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 49503. See growing zones in Michigan.

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