Frost dates 2026–2027

Frost dates for Addison, Illinois

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Chicago Ohare Intl Airport, 5.9 mi away (close match).

Last spring frostApr 16
First fall frostOct 28
193 frost-free days
Last spring frostApr 161 year in 10 after May 1
First fall frostOct 281 year in 10 by Oct 15
Growing season193 daysbetween median 32°F dates
Hardiness zoneZone 6a−10 to −5°F average extreme low

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Will it freeze in Addison in the next 7 nights?

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

Tonight: forecast low 39°F. Above 36°F.

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

2 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 Addison

The median first fall hard-freeze date (28°F) is November 7, from NOAA’s 1991–2020 Climate Normals at Chicago Ohare Intl Airport. 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 15 · Apr 29 · May 13 Oct 3 · Oct 18 · Oct 30 170 days
32°F freeze Apr 3 · Apr 16 · May 1 Oct 15 · Oct 28 · Nov 11 193 days
28°F hard freeze Mar 21 · Apr 5 · Apr 19 Oct 27 · Nov 7 · Nov 22 217 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USW00094846. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Chicago Ohare Intl Airport

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 Addison, IL come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Chicago Ohare Intl Airport (station USW00094846, elevation 658 ft), 5.9 mi from Addison. 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 Addison

CityDistanceLast spring frostFirst fall frost
Wood Dale, IL 3.1 mi Apr 16 Oct 28
Itasca, IL 3.1 mi Apr 16 Oct 28
Villa Park, IL 3.7 mi Apr 28 Oct 16
Glendale Heights, IL 3.7 mi Apr 28 Oct 16
Bensenville, IL 3.7 mi Apr 16 Oct 28
Lombard, IL 3.7 mi Apr 28 Oct 16
Elmhurst, IL 4.3 mi Apr 16 Oct 28
Bloomingdale, IL 4.3 mi Apr 30 Oct 13
Elk Grove Village, IL 5.0 mi Apr 16 Oct 28
Glen Ellyn, IL 5.0 mi Apr 28 Oct 16

Frequently asked questions

When is the last frost in Addison?

On average, the last spring frost (32°F) in Addison is around April 16. In about 1 year in 10 it comes after May 1, and in 9 years in 10 it comes after April 3.

When is the first frost in Addison?

The first fall frost (32°F) usually arrives around October 28. There’s a 10% chance of a freeze by October 15 and a 90% chance by November 11.

Can it frost in Addison 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 April 29.

What growing zone is Addison?

Addison 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 60101. See growing zones in Illinois.

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