Frost dates 2026–2027

Frost dates for Snowflake, Arizona

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Snowflake, 1.0 mi away (close match).

Last spring frostMay 11
First fall frostOct 10
149 frost-free days
Last spring frostMay 111 year in 10 after May 31
First fall frostOct 101 year in 10 by Sep 28
Growing season149 daysbetween median 32°F dates
Hardiness zoneZone 7a0 to 5°F average extreme low

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Will it freeze in Snowflake in the next 7 nights?

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

Tonight: forecast low 36°F. Frost possible.

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

7 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 Snowflake

The median first fall hard-freeze date (28°F) is October 20, from NOAA’s 1991–2020 Climate Normals at Snowflake. 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 10 · May 26 · Jun 12 Sep 20 · Oct 2 · Oct 13 127 days
32°F freeze Apr 27 · May 11 · May 31 Sep 28 · Oct 10 · Oct 22 149 days
28°F hard freeze Apr 12 · Apr 29 · May 15 Oct 6 · Oct 20 · Nov 2 172 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00028012. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Snowflake

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 Snowflake, AZ come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Snowflake (station USC00028012, elevation 5,642 ft), 1.0 mi from Snowflake. 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 Snowflake

CityDistanceLast spring frostFirst fall frost
Show Low, AZ 18 mi May 5 Oct 15
Winslow, AZ 49 mi Apr 27 Oct 18
Payson, AZ 73 mi Apr 29 Oct 24
Globe, AZ 86 mi Mar 11 Nov 21
Flagstaff, AZ 98 mi Jun 4 Sep 28
Sedona, AZ 99 mi Apr 1 Nov 17
Camp Verde, AZ 101 mi Apr 16 Oct 30
Gallup, NM 103 mi May 11 Oct 7
Cottonwood, AZ 109 mi Mar 30 Nov 10
Fountain Hills, AZ 114 mi Jan 6 Dec 28

Frequently asked questions

When is the last frost in Snowflake?

On average, the last spring frost (32°F) in Snowflake is around May 11. In about 1 year in 10 it comes after May 31, and in 9 years in 10 it comes after April 27.

When is the first frost in Snowflake?

The first fall frost (32°F) usually arrives around October 10. There’s a 10% chance of a freeze by September 28 and a 90% chance by October 22.

Can it frost in Snowflake 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 26.

What growing zone is Snowflake?

Snowflake is in USDA Plant Hardiness Zone 7a (average annual extreme minimum temperature 0 to 5°F), based on the 2023 USDA map for ZIP code 85937. See growing zones in Arizona.

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