Frost dates 2026–2027

Frost dates for Council Bluffs, Iowa

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Omaha Eppley Airfield, 5.7 mi away (close match).

Last spring frostApr 18
First fall frostOct 21
185 frost-free days
Last spring frostApr 181 year in 10 after Apr 30
First fall frostOct 211 year in 10 by Oct 6
Growing season185 daysbetween median 32°F dates
Hardiness zoneZone 5b−15 to −10°F average extreme low

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Will it freeze in Council Bluffs in the next 7 nights?

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

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

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

1 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 Council Bluffs

The median first fall hard-freeze date (28°F) is October 30, from NOAA’s 1991–2020 Climate Normals at Omaha Eppley Airfield. 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 28 · May 11 Sep 27 · Oct 10 · Oct 23 165 days
32°F freeze Apr 5 · Apr 18 · Apr 30 Oct 6 · Oct 21 · Nov 1 185 days
28°F hard freeze Mar 24 · Apr 8 · Apr 21 Oct 17 · Oct 30 · Nov 11 204 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USW00014942. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Omaha Eppley Airfield

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 Council Bluffs, IA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Omaha Eppley Airfield (station USW00014942, elevation 982 ft), 5.7 mi from Council Bluffs. 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 Council Bluffs

CityDistanceLast spring frostFirst fall frost
Bellevue, NE 7.5 mi Apr 17 Oct 19
Ralston, NE 9.9 mi Apr 21 Oct 18
Omaha, NE 11 mi Apr 16 Oct 18
La Vista, NE 12 mi Apr 21 Oct 18
Papillion, NE 14 mi Apr 21 Oct 18
Glenwood, IA 14 mi Apr 23 Oct 11
Plattsmouth, NE 16 mi Apr 23 Oct 11
Gretna, NE 19 mi Apr 21 Oct 18
Blair, NE 25 mi Apr 22 Oct 17
Fremont, NE 36 mi Apr 23 Oct 15

Frequently asked questions

When is the last frost in Council Bluffs?

On average, the last spring frost (32°F) in Council Bluffs is around April 18. In about 1 year in 10 it comes after April 30, and in 9 years in 10 it comes after April 5.

When is the first frost in Council Bluffs?

The first fall frost (32°F) usually arrives around October 21. There’s a 10% chance of a freeze by October 6 and a 90% chance by November 1.

Can it frost in Council Bluffs 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 28.

What growing zone is Council Bluffs?

Council Bluffs 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 51501. See growing zones in Iowa.

More: all Iowa frost dates · Iowa growing zones · UV index today in Council Bluffs · frost vs. freeze