Frost dates 2026–2027

Frost dates for Florence, Arizona

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Florence, 2.7 mi away (close match).

Last spring frostJan 30
First fall frostDec 12
319 frost-free days
Last spring frostJan 301 year in 10 after Feb 24
First fall frostDec 121 year in 10 by Nov 22
Growing season319 daysbetween median 32°F dates
Hardiness zoneZone 9a20 to 25°F average extreme low

Checking current alerts… View NWS forecast and alerts.

Will it freeze in Florence in the next 7 nights?

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

Tonight: forecast low 55°F. Above 36°F.

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

No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.

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 Florence

The median first fall hard-freeze date (28°F) is December 26, from NOAA’s 1991–2020 Climate Normals at Florence. 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 Jan 25 · Feb 21 · Mar 13 Nov 12 · Nov 29 · Dec 19 281 days
32°F freeze Dec 27 · Jan 30 · Feb 24 Nov 22 · Dec 12 · Jan 12 319 days
28°F hard freeze Dec 11 · Jan 8 · Feb 11 Dec 1 · Dec 26 · Jan 31 362 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00023027. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Florence

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 Florence, AZ come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Florence (station USC00023027, elevation 1,400 ft), 2.7 mi from Florence. 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 Florence

CityDistanceLast spring frostFirst fall frost
Coolidge, AZ 11 mi Feb 17 Nov 29
Queen Creek, AZ 16 mi Feb 1 Dec 11
Apache Junction, AZ 23 mi Feb 11 Dec 10
Casa Grande, AZ 23 mi Feb 5 Dec 6
Eloy, AZ 25 mi Feb 24 Nov 28
Gilbert, AZ 25 mi Feb 1 Dec 11
Mesa, AZ 29 mi Feb 1 Dec 10
Chandler, AZ 29 mi Feb 13 Dec 5
Maricopa, AZ 34 mi Feb 23 Nov 24
Tempe, AZ 37 mi Feb 13 Dec 5

Frequently asked questions

When is the last frost in Florence?

On average, the last spring frost (32°F) in Florence is around January 30. In about 1 year in 10 it comes after February 24, and in 9 years in 10 it comes after December 27.

When is the first frost in Florence?

The first fall frost (32°F) usually arrives around December 12. There’s a 10% chance of a freeze by November 22 and a 90% chance by January 12.

Can it frost in Florence 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 February 21.

What growing zone is Florence?

Florence is in USDA Plant Hardiness Zone 9a (average annual extreme minimum temperature 20 to 25°F), based on the 2023 USDA map for ZIP code 85191. See growing zones in Arizona.

More: all Arizona frost dates · Arizona growing zones · UV index today in Florence · frost vs. freeze