Frost dates 2026–2027

Frost dates for Clarinda, Iowa

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Clarinda, 1.2 mi away (close match).

Last spring frostApr 25
First fall frostOct 11
168 frost-free days
Last spring frostApr 251 year in 10 after May 7
First fall frostOct 111 year in 10 by Sep 26
Growing season168 daysbetween median 32°F dates
Hardiness zoneZone 5b−15 to −10°F average extreme low

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Will it freeze in Clarinda 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 37°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 Clarinda

The median first fall hard-freeze date (28°F) is October 21, from NOAA’s 1991–2020 Climate Normals at Clarinda. 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 22 · May 4 · May 18 Sep 17 · Oct 1 · Oct 15 150 days
32°F freeze Apr 11 · Apr 25 · May 7 Sep 26 · Oct 11 · Oct 24 168 days
28°F hard freeze Apr 1 · Apr 14 · Apr 29 Oct 6 · Oct 21 · Nov 2 189 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00131533. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Clarinda

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 Clarinda, IA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Clarinda (station USC00131533, elevation 980 ft), 1.2 mi from Clarinda. 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 Clarinda

CityDistanceLast spring frostFirst fall frost
Red Oak, IA 22 mi Apr 24 Oct 13
Maryville, MO 29 mi Apr 19 Oct 17
Creston, IA 42 mi Apr 28 Oct 11
Glenwood, IA 43 mi Apr 23 Oct 11
Nebraska City, NE 43 mi Apr 18 Oct 19
Atlantic, IA 45 mi Apr 30 Oct 2
Plattsmouth, NE 48 mi Apr 23 Oct 11
Council Bluffs, IA 55 mi Apr 18 Oct 21
Bellevue, NE 55 mi Apr 17 Oct 19
Savannah, MO 57 mi Apr 17 Oct 19

Frequently asked questions

When is the last frost in Clarinda?

On average, the last spring frost (32°F) in Clarinda is around April 25. In about 1 year in 10 it comes after May 7, and in 9 years in 10 it comes after April 11.

When is the first frost in Clarinda?

The first fall frost (32°F) usually arrives around October 11. There’s a 10% chance of a freeze by September 26 and a 90% chance by October 24.

Can it frost in Clarinda 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 4.

What growing zone is Clarinda?

Clarinda 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 51632. See growing zones in Iowa.

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