Frost dates 2026–2027

Frost dates for Eaton Rapids, Michigan

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Eaton Rapids, 0.6 mi away (close match).

Last spring frostApr 30
First fall frostOct 14
165 frost-free days
Last spring frostApr 301 year in 10 after May 16
First fall frostOct 141 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 Eaton Rapids in the next 7 nights?

The earliest overnight low at or below 32°F in the available NWS frost forecast is Sat, Nov 7: 30°F (Sat, Nov 7, 6:00 PM EST to Sun, Nov 8, 6:00 AM EST).

Tonight: forecast low 37°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 Eaton Rapids

The median first fall hard-freeze date (28°F) is October 27, from NOAA’s 1991–2020 Climate Normals at Eaton 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 Apr 26 · May 10 · May 25 Sep 21 · Oct 2 · Oct 15 145 days
32°F freeze Apr 16 · Apr 30 · May 16 Oct 1 · Oct 14 · Oct 29 165 days
28°F hard freeze Apr 5 · Apr 19 · May 6 Oct 12 · Oct 27 · Nov 10 191 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00202437. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Eaton 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 Eaton Rapids, MI come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Eaton Rapids (station USC00202437, elevation 870 ft), 0.6 mi from Eaton 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 Eaton Rapids

CityDistanceLast spring frostFirst fall frost
Charlotte, MI 9.9 mi May 1 Oct 15
Mason, MI 12 mi Apr 28 Oct 17
Lansing, MI 15 mi May 1 Oct 13
Grand Ledge, MI 17 mi May 1 Oct 13
East Lansing, MI 19 mi Apr 28 Oct 17
Albion, MI 19 mi May 1 Oct 14
Jackson, MI 22 mi May 1 Oct 14
Marshall, MI 24 mi Apr 30 Oct 19
Springfield, MI 32 mi Apr 30 Oct 19
Battle Creek, MI 33 mi Apr 30 Oct 19

Frequently asked questions

When is the last frost in Eaton Rapids?

On average, the last spring frost (32°F) in Eaton Rapids is around April 30. In about 1 year in 10 it comes after May 16, and in 9 years in 10 it comes after April 16.

When is the first frost in Eaton Rapids?

The first fall frost (32°F) usually arrives around October 14. There’s a 10% chance of a freeze by October 1 and a 90% chance by October 29.

Can it frost in Eaton 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 10.

What growing zone is Eaton Rapids?

Eaton 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 48827. See growing zones in Michigan.

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