Frost dates 2026–2027

Frost dates for Nibley, Utah

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Logan 5 SW Experiment Farm, 2.4 mi away (close match).

Last spring frostMay 12
First fall frostSep 28
138 frost-free days
Last spring frostMay 121 year in 10 after May 29
First fall frostSep 281 year in 10 by Sep 14
Growing season138 daysbetween median 32°F dates
Hardiness zoneZone 6a−10 to −5°F average extreme low

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Will it freeze in Nibley in the next 7 nights?

The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 32°F (Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST).

Tonight: forecast low 32°F. Freeze.

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

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 Nibley

The median first fall hard-freeze date (28°F) is October 9, from NOAA’s 1991–2020 Climate Normals at Logan 5 SW Experiment Farm. 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 May 14 · May 31 · Jun 16 Sep 4 · Sep 18 · Oct 2 109 days
32°F freeze Apr 30 · May 12 · May 29 Sep 14 · Sep 28 · Oct 12 138 days
28°F hard freeze Apr 9 · Apr 28 · May 12 Sep 26 · Oct 9 · Oct 24 164 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00425194. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Logan 5 SW Experiment Farm

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 Nibley, UT come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Logan 5 SW Experiment Farm (station USC00425194, elevation 4,488 ft), 2.4 mi from Nibley. 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 Nibley

CityDistanceLast spring frostFirst fall frost
Providence, UT 2.5 mi Apr 30 Oct 16
Hyrum, UT 2.5 mi May 12 Sep 28
Logan, UT 4.3 mi May 8 Oct 2
North Logan, UT 7.5 mi Apr 30 Oct 16
Hyde Park, UT 9.3 mi May 8 Oct 2
Smithfield, UT 11 mi May 8 Oct 2
Brigham City, UT 16 mi May 5 Oct 5
Perry, UT 17 mi May 5 Oct 5
Tremonton, UT 18 mi Apr 24 Oct 17
Pleasant View, UT 25 mi Apr 21 Oct 23

Frequently asked questions

When is the last frost in Nibley?

On average, the last spring frost (32°F) in Nibley is around May 12. In about 1 year in 10 it comes after May 29, and in 9 years in 10 it comes after April 30.

When is the first frost in Nibley?

The first fall frost (32°F) usually arrives around September 28. There’s a 10% chance of a freeze by September 14 and a 90% chance by October 12.

Can it frost in Nibley 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 31.

What growing zone is Nibley?

Nibley 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 84326. See growing zones in Utah.

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