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Arizona frost dates by weather station

Arizona has 175 NOAA weather stations with 1991–2020 freeze statistics. Median last spring frost dates run from Jan 4 at Bullhead City to Jun 23 at Flagstaff 4 SW.

175Stations
Jan 4Earliest last frostBullhead City
Jun 23Latest last frostFlagstaff 4 SW
365 daysLongest growing seasonPhoenix Sky Harbor Intl Airport

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Arizona stations: median (50%) frost dates at 32°F
Station	Last spring frost	First fall frost	Growing season	Elevation
Aguila	Mar 17	Nov 19	243 days	2,165 ft
Ajo	Jan 10	Dec 21	347 days	1,751 ft
Alamo Dam	Mar 4	Nov 23	261 days	1,290 ft
Alpine	Jun 15	Sep 21	96 days	8,050 ft
Anvil Rch	Mar 27	Nov 9	226 days	2,759 ft
Apache Junction 5 NE	Feb 11	Dec 10	304 days	2,070 ft
Arizona City	Feb 28	Nov 21	266 days	1,525 ft
Bagdad	Apr 7	Nov 12	217 days	3,935 ft
Beaver Dam	Mar 7	Nov 19	251 days	1,931 ft
Bellemont WFO	Jun 21	Sep 17	85 days	7,152 ft
Benson 6se	Apr 12	Nov 1	202 days	3,690 ft
Betatakin	May 7	Oct 15	159 days	7,286 ft
Bisbee 1wnw	Apr 1	Nov 10	222 days	5,560 ft
Black River Pumps	May 16	Oct 13	149 days	6,065 ft
Blue Ridge Ranger Station	May 31	Oct 2	126 days	6,880 ft
Bouse	Feb 18	Nov 28	284 days	925 ft
Bowie	Apr 1	Nov 6	217 days	3,777 ft
Bright Angel Ranger Station	Jun 3	Sep 27	113 days	8,000 ft
Bullhead City	Jan 4	Dec 23	356 days	531 ft
Canelo 1 NW	Apr 23	Oct 30	188 days	5,010 ft
Canyon De Chelly	May 6	Oct 8	153 days	5,610 ft
Carefree	Feb 4	Dec 16	313 days	2,530 ft
Casa Grande	Feb 5	Dec 6	305 days	1,400 ft
Casa Grande National Monument	Feb 17	Nov 29	284 days	1,419 ft
Cascabel	Apr 24	Oct 31	187 days	3,194 ft
Castle Hot Springs	Jan 15	Dec 22	341 days	1,990 ft
Catalina State Park	Apr 2	Nov 11	222 days	2,707 ft
Chandler Heights	Feb 1	Dec 11	315 days	1,425 ft
Childs	Apr 2	Nov 11	223 days	2,650 ft
Chino Valley	Apr 27	Oct 24	178 days	4,750 ft
Chiricahua National Monument	Apr 16	Nov 8	203 days	5,300 ft
Clifton	Feb 26	Nov 23	268 days	3,520 ft
Colorado City	Apr 26	Oct 25	180 days	5,001 ft
Cordes	Apr 5	Nov 17	221 days	3,771 ft
Coronado Nmem	Apr 7	Nov 9	213 days	5,242 ft
Dateland Whitewing Rch	Jan 25	Dec 13	324 days	520 ft
Diamond M Rch	May 17	Oct 10	146 days	5,492 ft
Douglas	Mar 18	Nov 13	235 days	4,040 ft
Douglas Bisbee Inl Airport	Apr 11	Nov 2	203 days	4,105 ft
Duncan	Apr 24	Oct 25	183 days	3,660 ft
E Mesa	Feb 1	Dec 10	312 days	1,518 ft
Ehrenberg 2 E	Jan 4	Dec 19	347 days	465 ft
Elgin 5 S	Apr 18	Nov 1	195 days	4,811 ft
Eloy 4 NE	Feb 24	Nov 28	273 days	1,545 ft
Flagstaff 4 SW	Jun 23	Sep 15	81 days	7,125 ft
Flagstaff Pulliam Airport	Jun 4	Sep 28	115 days	7,003 ft
Florence	Jan 30	Dec 12	319 days	1,400 ft
Fort Huachuca Pioneer Airfield	Mar 16	Nov 21	246 days	4,768 ft
Fort Thomas 2 SW	Apr 1	Nov 6	217 days	2,835 ft
Fort Valley	Jun 11	Sep 25	99 days	7,347 ft
Fountain Hills	Jan 6	Dec 28	356 days	1,580 ft
Ganado	May 15	Oct 10	147 days	6,340 ft
Gila Bend 2se	Jan 23	Dec 11	323 days	794 ft
Globe #3	Mar 11	Nov 21	253 days	3,660 ft
Grand Canyon E Entrance	May 10	Oct 20	165 days	7,480 ft
Grand Canyon National Park 2	Jun 1	Oct 3	123 days	6,785 ft
Grand Canyon National Park Airport	Jun 17	Sep 24	97 days	6,606 ft
Grand Canyon Visitor Center	May 2	Oct 27	177 days	7,083 ft
Green Valley	Feb 25	Nov 27	276 days	2,900 ft
Greer	Jun 5	Sep 29	113 days	8,275 ft
Happy Jack Ranger Station	Jun 1	Oct 3	124 days	7,480 ft
Heber (black Mesa) Ranger Station	May 23	Oct 5	135 days	6,590 ft
Holbrook	Apr 22	Oct 24	184 days	5,085 ft
Jerome	Mar 26	Nov 25	242 days	4,950 ft
Kartchner Caverns	Mar 20	Nov 15	237 days	4,690 ft
Keams Canyon	May 16	Oct 10	147 days	6,205 ft
Kingman Mohave Co Airport	Apr 2	Nov 11	220 days	3,420 ft
Kitt Peak	Apr 26	Nov 4	195 days	6,790 ft
Kofa Mine	Jan 11	Jan 9	365 days	1,775 ft
Lake Havasu City	Jan 5	Dec 29	365 days	449 ft
Laveen 3 SSE	Jan 14	Dec 22	343 days	1,135 ft
Lees Ferry	Mar 5	Nov 19	257 days	3,210 ft
Litchfield Park	Jan 7	Dec 24	351 days	1,040 ft
Lukachukai	May 3	Oct 17	163 days	6,520 ft
Maricopa 4 N	Feb 23	Nov 24	274 days	1,160 ft
Mc Nary 2n	May 20	Oct 11	142 days	7,340 ft
Mc Neal	Apr 6	Nov 10	215 days	4,170 ft
Meadview 1w	Mar 5	Nov 28	265 days	2,938 ft
Meteor Crater	Apr 30	Oct 23	174 days	5,535 ft
Miami	Feb 24	Dec 1	279 days	3,560 ft
Montezuma Castle National Monument	Apr 16	Oct 30	196 days	3,180 ft
Monument Valley	Apr 10	Nov 1	205 days	5,501 ft
Mormon Flat	Jan 29	Dec 24	334 days	1,705 ft
Mount Lemmon Willow Canyon	Apr 1	Nov 19	229 days	7,027 ft
Mund's Park	Jun 10	Sep 27	106 days	6,470 ft
Natural Brg	Apr 9	Nov 10	211 days	4,608 ft
Nogales 6 N	Apr 16	Nov 2	199 days	3,461 ft
Nogales Intl Airport	Mar 20	Nov 17	239 days	3,932 ft
Oak Creek Canyon	Apr 14	Nov 5	204 days	5,118 ft
Oracle 2 SE	Mar 23	Nov 22	242 days	4,510 ft
Oracle State Park	Mar 29	Nov 13	225 days	4,595 ft
Organ Pipe Cactus National Monument	Feb 4	Dec 15	314 days	1,678 ft
Page	Mar 27	Nov 9	226 days	4,270 ft
Page Muni Airport	Mar 7	Nov 15	250 days	4,310 ft
Painted Desert National Park	May 1	Oct 20	169 days	5,760 ft
Painted Rock Dam	Jan 21	Dec 15	327 days	568 ft
Paradise	Apr 21	Oct 27	188 days	5,460 ft
Parker	Jan 12	Dec 19	338 days	420 ft
Payson	Apr 29	Oct 24	176 days	4,850 ft
Pearce - Sunsites	Apr 14	Nov 2	200 days	4,350 ft
Petrified Forest National Park	May 4	Oct 16	162 days	5,446 ft
Phantom Rch	Feb 9	Dec 5	295 days	2,530 ft
Phoenix Deer Valley Muni Airport	Jan 8	Dec 25	354 days	1,455 ft
Phoenix Sky Harbor Intl Airport	Jan 5	Jan 3	365 days	1,107 ft
Picacho 8 SE	Feb 6	Dec 9	308 days	1,981 ft
Pinetop 2e	May 22	Oct 6	138 days	7,200 ft
Pinnacle Peak	Jan 27	Dec 21	330 days	2,565 ft
Pipe Spring National Monument	May 1	Oct 19	168 days	4,920 ft
Pleasant Valley	May 6	Oct 20	165 days	5,183 ft
Portal 4 SW	May 3	Oct 25	174 days	5,390 ft
Prescott	Apr 30	Oct 20	172 days	5,205 ft
Prescott Love Field	Apr 20	Oct 27	188 days	5,042 ft
Punkin Center	Mar 7	Nov 20	255 days	2,325 ft
Quartzsite	Jan 28	Dec 6	315 days	875 ft
Robson Rch	Feb 7	Dec 3	298 days	1,495 ft
Roosevelt 1 S	Jan 17	Dec 25	342 days	2,605 ft
Safford Ag Center	Mar 25	Nov 9	228 days	2,954 ft
Safford Muni Airport	Mar 8	Nov 20	254 days	3,176 ft
Saguaro National Park	Jan 26	Dec 16	326 days	3,080 ft
Saint Johns	May 2	Oct 14	164 days	5,790 ft
San Carlos Reservoir	Mar 13	Nov 19	247 days	2,532 ft
San Manuel	Feb 4	Dec 8	306 days	3,420 ft
San Simon	Apr 16	Nov 2	198 days	3,580 ft
Sanders	May 22	Oct 8	138 days	5,853 ft
Santa Rita Exp. Range	Feb 25	Dec 5	282 days	4,300 ft
Sasabe	Mar 21	Nov 20	246 days	3,590 ft
Scottsdale Muni Airport	Jan 6	Dec 26	353 days	1,473 ft
Sedona	Apr 1	Nov 17	229 days	4,220 ft
Seligman	May 10	Oct 15	154 days	5,250 ft
Show Low Airport	May 5	Oct 15	162 days	6,411 ft
Sierra Vista	Apr 5	Nov 9	216 days	4,606 ft
Snowflake	May 11	Oct 10	149 days	5,642 ft
Sonoita	Mar 28	Nov 21	237 days	4,895 ft
South Phoenix	Jan 21	Dec 16	331 days	1,155 ft
Springerville	Jun 1	Sep 26	114 days	6,998 ft
St. Johns Industrial Airport	May 3	Oct 10	160 days	5,733 ft
Stewart Mountain Dam	Feb 13	Dec 5	295 days	1,422 ft
Sunrise Mountain	Jun 18	Sep 18	91 days	9,370 ft
Sunset Crater National Monument	Jun 16	Sep 19	94 days	6,980 ft
Superior	Jan 18	Dec 28	342 days	2,860 ft
Tacna 3 NE	Feb 13	Dec 1	288 days	324 ft
Teec Nos Pos	Apr 11	Nov 1	200 days	5,290 ft
Tempe Asu	Feb 13	Dec 5	298 days	1,167 ft
Temple Bar	Feb 4	Dec 10	309 days	1,280 ft
Tohono Chul	Feb 26	Dec 4	279 days	2,527 ft
Tombstone	Mar 4	Nov 29	264 days	4,659 ft
Tuba City	Apr 16	Oct 28	193 days	4,988 ft
Tucson 11 W	Feb 8	Dec 10	303 days	2,733 ft
Tucson 17 NW	Feb 23	Dec 6	287 days	2,561 ft
Tucson Camp Ave Exp.	Feb 20	Nov 27	280 days	2,330 ft
Tucson Intl Airport	Feb 5	Dec 9	307 days	2,549 ft
Tucson U Of A #1	Feb 11	Dec 2	293 days	2,315 ft
Tucson WFO	Jan 20	Dec 17	332 days	2,435 ft
Tumacacori National Monument	Apr 5	Nov 10	217 days	3,267 ft
Tuzigoot	Mar 30	Nov 10	223 days	3,470 ft
Twin Arrows	Apr 14	Oct 25	192 days	5,815 ft
Wahweap	Mar 14	Nov 16	244 days	3,730 ft
Walnut Canyon National Monument	May 13	Oct 6	145 days	6,695 ft
Walnut Creek	May 24	Oct 7	135 days	5,090 ft
Wickenburg	Mar 7	Nov 20	254 days	2,095 ft
Wikieup	Mar 19	Nov 23	246 days	2,010 ft
Willcox	Apr 9	Oct 31	204 days	4,170 ft
Williams	May 22	Oct 5	135 days	6,909 ft
Williams 35 NNW	May 9	Oct 19	161 days	5,990 ft
Willow Beach	Jan 7	Dec 29	358 days	740 ft
Window Rock Airport	May 29	Sep 28	121 days	6,739 ft
Winslow Muni Airport	Apr 27	Oct 18	174 days	4,886 ft
Wittmann 1se	Feb 5	Dec 11	306 days	1,683 ft
Wupatki National Monument	Apr 7	Nov 3	206 days	4,908 ft
Youngtown	Jan 20	Dec 15	331 days	1,135 ft
Yucca 1 NNE	Feb 18	Dec 2	288 days	1,950 ft
Yuma 27 ENE	Jan 11	Dec 21	347 days	620 ft
Yuma MCAS	none	none	year-round	213 ft
Yuma Proving Ground	Jan 4	Dec 25	361 days	324 ft
Yuma Quartermaster Depot	Jan 8	Dec 28	362 days	160 ft

Sources

NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.

Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.