Frost dates 2026–2027

Frost dates for Huntley, Illinois

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Crystal Lake 4NW, 7.2 mi away (close match).

Last spring frostApr 25
First fall frostOct 22
179 frost-free days
Last spring frostApr 251 year in 10 after May 9
First fall frostOct 221 year in 10 by Oct 7
Growing season179 daysbetween median 32°F dates
Hardiness zoneZone 5b−15 to −10°F average extreme low

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Will it freeze in Huntley in the next 7 nights?

The earliest overnight low at or below 32°F in the available NWS frost forecast is Fri, Nov 6: 28°F (Fri, Nov 6, 6:00 PM CST to Sat, Nov 7, 6:00 AM CST).

Tonight: forecast low 36°F. Frost possible.

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

4 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 Huntley

The median first fall hard-freeze date (28°F) is November 1, from NOAA’s 1991–2020 Climate Normals at Crystal Lake 4NW. 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 23 · May 5 · May 21 Sep 25 · Oct 11 · Oct 24 157 days
32°F freeze Apr 11 · Apr 25 · May 9 Oct 7 · Oct 22 · Nov 4 179 days
28°F hard freeze Mar 31 · Apr 12 · Apr 27 Oct 20 · Nov 1 · Nov 15 202 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00112048. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Crystal Lake 4NW

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 Huntley, IL come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Crystal Lake 4NW (station USC00112048, elevation 940 ft), 7.2 mi from Huntley. 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 Huntley

CityDistanceLast spring frostFirst fall frost
Hampshire, IL 5.0 mi Apr 28 Oct 12
Gilberts, IL 5.0 mi Apr 26 Oct 18
Pingree Grove, IL 5.0 mi Apr 26 Oct 18
Algonquin, IL 5.6 mi Apr 26 Oct 18
Lake in the Hills, IL 6.2 mi Apr 25 Oct 22
West Dundee, IL 6.2 mi Apr 26 Oct 18
Crystal Lake, IL 7.5 mi Apr 25 Oct 22
Carpentersville, IL 7.5 mi Apr 26 Oct 18
Elgin, IL 9.9 mi Apr 26 Oct 18
Cary, IL 9.9 mi May 1 Oct 11

Frequently asked questions

When is the last frost in Huntley?

On average, the last spring frost (32°F) in Huntley is around April 25. In about 1 year in 10 it comes after May 9, and in 9 years in 10 it comes after April 11.

When is the first frost in Huntley?

The first fall frost (32°F) usually arrives around October 22. There’s a 10% chance of a freeze by October 7 and a 90% chance by November 4.

Can it frost in Huntley 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 5.

What growing zone is Huntley?

Huntley is in USDA Plant Hardiness Zone 5b (average annual extreme minimum temperature −15 to −10°F), based on the 2023 USDA map for ZIP code 60142. See growing zones in Illinois.

More: all Illinois frost dates · Illinois growing zones · UV index today in Huntley · frost vs. freeze