Frost dates 2026–2027

Frost dates for East Peoria, Illinois

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

Last spring frostApr 16
First fall frostOct 23
189 frost-free days
Last spring frostApr 161 year in 10 after May 4
First fall frostOct 231 year in 10 by Oct 9
Growing season189 daysbetween median 32°F dates
Hardiness zoneZone 6a−10 to −5°F average extreme low

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Will it freeze in East Peoria in the next 7 nights?

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

Tonight: forecast low 40°F. Above 36°F.

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

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 East Peoria

The median first fall hard-freeze date (28°F) is November 2, from NOAA’s 1991–2020 Climate Normals at Peoria Gtr Peoria 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 14 · Apr 27 · May 14 Sep 28 · Oct 14 · Oct 25 168 days
32°F freeze Apr 2 · Apr 16 · May 4 Oct 9 · Oct 23 · Nov 3 189 days
28°F hard freeze Mar 19 · Apr 5 · Apr 21 Oct 21 · Nov 2 · Nov 16 212 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USW00014842. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Peoria Gtr Peoria 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 East Peoria, IL come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Peoria Gtr Peoria Airport (station USW00014842, elevation 650 ft), 7.5 mi from East Peoria. 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 East Peoria

CityDistanceLast spring frostFirst fall frost
Peoria Heights, IL 5.0 mi Apr 16 Oct 23
Morton, IL 5.6 mi Apr 21 Oct 17
Washington, IL 6.2 mi Apr 21 Oct 17
Bartonville, IL 6.8 mi Apr 16 Oct 23
Peoria, IL 6.8 mi Apr 16 Oct 23
Pekin, IL 8.7 mi Apr 16 Oct 23
Eureka, IL 14 mi Apr 21 Oct 17
Chillicothe, IL 17 mi Apr 20 Oct 17
Canton, IL 27 mi Apr 17 Oct 19
Normal, IL 30 mi Apr 25 Oct 16

Frequently asked questions

When is the last frost in East Peoria?

On average, the last spring frost (32°F) in East Peoria is around April 16. In about 1 year in 10 it comes after May 4, and in 9 years in 10 it comes after April 2.

When is the first frost in East Peoria?

The first fall frost (32°F) usually arrives around October 23. There’s a 10% chance of a freeze by October 9 and a 90% chance by November 3.

Can it frost in East Peoria 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 27.

What growing zone is East Peoria?

East Peoria 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 61611. See growing zones in Illinois.

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