Last frost date in Florence, AZ

Average last frost
January 30

In Florence, the last spring frost comes around January 30 in an average year. Wait until February 24 if you want 90% odds of no more frost. The first fall frost usually arrives about December 12, which leaves 319 frost-free days. An early freeze before November 22 happens one year in ten.

Safe after (10% risk)
Feb 24
Average first frost
Dec 12
Frost-free season
319 days
Hard freeze (28°F) ends
Jan 8
Next 6 nights in Florence

No frost in the next 6 nights

National Weather Service forecast, updated Oct 22, 12:57 UTC

  1. ThuOct 2261°
  2. FriOct 2358°
  3. SatOct 2457°
  4. SunOct 2557°
  5. MonOct 2659°
  6. TueOct 2761°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Jan 30First frost Dec 12319 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND319 frost-free days
Frost risk through the year at Florence, 2.7 miles from Florence.

Planting calendar for Florence

Windows count forward or back from the average frost dates above. Click a crop for dates across Arizona.

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesFeb 15–Mar 1
PumpkinsFeb 15–Mar 1
SunflowersFeb 15–Mar 8
CucumbersFeb 22–Mar 1
CornFeb 15–Mar 1
Sweet potatoesFeb 20–Mar 6
WatermelonFeb 15–Mar 1
Green beansFeb 15–Mar 8
ZucchiniFeb 15–Mar 1
OkraFeb 20–Mar 6
PeppersFeb 15–Mar 1
BasilFeb 15–Mar 1
Butternut squashFeb 15–Mar 1
CantaloupeFeb 15–Mar 1
EggplantFeb 15–Mar 1
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesJan 2–Jan 16
OnionsDec 19–Jan 9
CarrotsJan 9–Feb 13
LettuceJan 16–Feb 6
BroccoliJan 2–Jan 16
BeetsJan 2–Feb 13
PeasDec 19–Jan 2
CabbageJan 2–Jan 16
RadishesDec 26–Feb 6
Brussels sproutsJan 16–Jan 30
SpinachDec 19–Jan 9
CilantroJan 16–Feb 6
KaleJan 2–Jan 16
Collard greensJan 2–Jan 16
TurnipsJan 2–Jan 16
DillJan 30–Feb 13
CeleryFeb 6–Feb 13
CauliflowerJan 16–Jan 30
LeeksJan 16–Jan 30
Swiss chardJan 16–Feb 13
ParsleyJan 16–Feb 6
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsDec 15–Jan 15
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesJan 2–Jan 16
AsparagusJan 2–Jan 16

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FDec 27Jan 30Feb 24Nov 22Dec 12Jan 12
Hard freeze, 28°FDec 11Jan 8Feb 11Dec 1Dec 26Jan 31

Read the spring 10% column as the date after which only one year in ten still gets frost. That is the safer date for tomatoes, peppers and basil.

Where these numbers come from

NOAA station Florence (USC00023027) sits 2.7 miles from the center of Florence at 1,400 feet. Its averages cover 1991 to 2020. Low spots, valleys and open fields can keep getting frost a week or two after the station stops; city centers and lakeshores usually get less of it.

Questions

When is the last frost in Florence, AZ?

The average last frost date in Florence is January 30, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after February 24.

When is the first frost in Florence?

The first frost in fall usually comes around December 12. One year in ten it arrives before November 22.

How long is the growing season in Florence?

About 319 days between the average last and first frost.

When should I plant tomatoes in Florence?

Plant tomato seedlings outside from February 15 to March 1. Start seeds indoors six to eight weeks earlier.

Nearby in Arizona

All 30 cities in Arizona