Frost dates
Frost dates in Arizona
Typical last spring frost and first fall frost for 172 weather stations across Arizona, from NOAA’s 1991–2020 climate normals.
Last spring frost
Jan 20 – May 23
Typical across Arizona (middle: Mar 31)
First fall frost
Oct 5 – Dec 19
Typical across Arizona (middle: Nov 12)
Your own yard can differ by weeks from the nearest town. Get frost dates for your exact spot →
By town
| Station | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Aguila | Mar 17 | Nov 19 | 247 |
| Ajo | Jan 10 | Dec 21 | 345 |
| Alamo Dam | Mar 4 | Nov 23 | 264 |
| Alpine | Jun 15 | Sep 21 | 98 |
| Anvil Rch | Mar 27 | Nov 9 | 227 |
| Apache Junction 5 NE | Feb 11 | Dec 10 | 302 |
| Arizona City | Feb 28 | Nov 21 | 266 |
| Bagdad | Apr 7 | Nov 12 | 219 |
| Beaver Dam | Mar 7 | Nov 19 | 257 |
| Bellemont | Jun 21 | Sep 17 | 88 |
| Benson 6 SE | Apr 12 | Nov 1 | 203 |
| Betatakin | May 7 | Oct 15 | 161 |
| Bisbee 1 WNW | Apr 1 | Nov 10 | 223 |
| Black Rvr Pumps | May 16 | Oct 13 | 150 |
| Blue Ridge RS | May 31 | Oct 2 | 124 |
| Bouse | Feb 18 | Nov 28 | 283 |
| Bowie | Apr 1 | Nov 6 | 219 |
| Bright Angel RS | Jun 3 | Sep 27 | 116 |
| Bullhead City | Jan 4 | Dec 23 | 353 |
| Canelo 1 NW | Apr 23 | Oct 30 | 190 |
| Canyon De Chelly | May 6 | Oct 8 | 155 |
| Carefree | Feb 4 | Dec 16 | 315 |
| Casa Grande | Feb 5 | Dec 6 | 304 |
| Casa Grande Nm | Feb 17 | Nov 29 | 285 |
| Cascabel | Apr 24 | Oct 31 | 190 |
| Castle Hot Springs | Jan 15 | Dec 22 | 341 |
| Catalina Sp | Apr 2 | Nov 11 | 223 |
| Chandler Heights | Feb 1 | Dec 11 | 313 |
| Childs | Apr 2 | Nov 11 | 223 |
| Chino Valley | Apr 27 | Oct 24 | 180 |
| Chiricahua Nm | Apr 16 | Nov 8 | 206 |
| Clifton | Feb 26 | Nov 23 | 270 |
| Colorado City | Apr 26 | Oct 25 | 182 |
| Cordes | Apr 5 | Nov 17 | 226 |
| Coronado Nmem | Apr 7 | Nov 9 | 216 |
| Dateland Whitewing Rch | Jan 25 | Dec 13 | 322 |
| Diamond M Rch | May 17 | Oct 10 | 146 |
| Douglas | Mar 18 | Nov 13 | 240 |
| Douglas Bisbee Inl Airport | Apr 11 | Nov 2 | 205 |
| Duncan | Apr 24 | Oct 25 | 184 |
| E Mesa | Feb 1 | Dec 10 | 312 |
| Ehrenberg 2 E | Jan 4 | Dec 19 | 349 |
| Elgin 5 S | Apr 18 | Nov 1 | 197 |
| Eloy 4 NE | Feb 24 | Nov 28 | 277 |
| Flagstaff 4 SW | Jun 23 | Sep 15 | 84 |
| Flagstaff Pulliam Airport | Jun 4 | Sep 28 | 116 |
| Florence | Jan 30 | Dec 12 | 316 |
| Fort Huachuca Pioneer Airfield | Mar 16 | Nov 21 | 250 |
| Fort Thomas 2 SW | Apr 1 | Nov 6 | 219 |
| Fort Valley | Jun 11 | Sep 25 | 106 |
| Fountain Hills | Jan 6 | Dec 28 | 356 |
| Ganado | May 15 | Oct 10 | 148 |
| Gila Bend 2 SE | Jan 23 | Dec 11 | 322 |
| Globe #3 | Mar 11 | Nov 21 | 255 |
| Grand Canyon E Entrance | May 10 | Oct 20 | 163 |
| Grand Canyon Np 2 | Jun 1 | Oct 3 | 124 |
| Grand Canyon Np Airport | Jun 17 | Sep 24 | 99 |
| Grand Canyon Visitor Ctr | May 2 | Oct 27 | 178 |
| Green Valley | Feb 25 | Nov 27 | 275 |
| Greer | Jun 5 | Sep 29 | 116 |
| Happy Jack RS | Jun 1 | Oct 3 | 124 |
| Heber (Black Mesa) RS | May 23 | Oct 5 | 135 |
| Holbrook | Apr 22 | Oct 24 | 185 |
| Jerome | Mar 26 | Nov 25 | 244 |
| Kartchner Caverns | Mar 20 | Nov 15 | 240 |
| Keams Canyon | May 16 | Oct 10 | 147 |
| Kingman Mohave County Airport | Apr 2 | Nov 11 | 223 |
| Kitt Peak | Apr 26 | Nov 4 | 192 |
| Lake Havasu City | Jan 5 | Dec 29 | 358 |
| Laveen 3 SSE | Jan 14 | Dec 22 | 342 |
| Lees Ferry | Mar 5 | Nov 19 | 259 |
| Litchfield Park | Jan 7 | Dec 24 | 351 |
| Lukachukai | May 3 | Oct 17 | 167 |
| Maricopa 4 N | Feb 23 | Nov 24 | 274 |
| Mc Nary 2 N | May 20 | Oct 11 | 144 |
| Mc Neal | Apr 6 | Nov 10 | 218 |
| Meadview 1 W | Mar 5 | Nov 28 | 268 |
| Meteor Crater | Apr 30 | Oct 23 | 176 |
| Miami | Feb 24 | Dec 1 | 280 |
| Montezuma Castle Nm | Apr 16 | Oct 30 | 197 |
| Monument Valley | Apr 10 | Nov 1 | 205 |
| Mormon Flat | Jan 29 | Dec 24 | 329 |
| Mount Lemmon Willow Canyon | Apr 1 | Nov 19 | 232 |
| Mund'S Park | Jun 10 | Sep 27 | 109 |
| Natural Brg | Apr 9 | Nov 10 | 215 |
| Nogales 6 N | Apr 16 | Nov 2 | 200 |
| Nogales International Airport | Mar 20 | Nov 17 | 242 |
| Oak Creek Canyon | Apr 14 | Nov 5 | 205 |
| Oracle 2 SE | Mar 23 | Nov 22 | 244 |
| Oracle Sp | Mar 29 | Nov 13 | 229 |
| Organ Pipe Cactus Nm | Feb 4 | Dec 15 | 314 |
| Page | Mar 27 | Nov 9 | 227 |
| Page Municipal Airport | Mar 7 | Nov 15 | 253 |
| Painted Desert Np | May 1 | Oct 20 | 172 |
| Painted Rock Dam | Jan 21 | Dec 15 | 328 |
| Paradise | Apr 21 | Oct 27 | 189 |
| Parker | Jan 12 | Dec 19 | 341 |
| Payson | Apr 29 | Oct 24 | 178 |
| Pearce - Sunsites | Apr 14 | Nov 2 | 202 |
| Petrified Forest Np | May 4 | Oct 16 | 165 |
| Phantom Rch | Feb 9 | Dec 5 | 299 |
| Phoenix Deer Valley Municipal Airport | Jan 8 | Dec 25 | 351 |
| Picacho 8 SE | Feb 6 | Dec 9 | 306 |
| Pinetop 2 E | May 22 | Oct 6 | 137 |
| Pinnacle Peak | Jan 27 | Dec 21 | 328 |
| Pipe Spring Nm | May 1 | Oct 19 | 171 |
| Pleasant Valley | May 6 | Oct 20 | 167 |
| Portal 4 SW | May 3 | Oct 25 | 175 |
| Prescott | Apr 30 | Oct 20 | 173 |
| Prescott Love Field | Apr 20 | Oct 27 | 190 |
| Punkin Ctr | Mar 7 | Nov 20 | 258 |
| Quartzsite | Jan 28 | Dec 6 | 312 |
| Robson Rch | Feb 7 | Dec 3 | 299 |
| Roosevelt 1 S | Jan 17 | Dec 25 | 342 |
| Safford Ag Ctr | Mar 25 | Nov 9 | 229 |
| Safford Municipal Airport | Mar 8 | Nov 20 | 257 |
| Saguaro Np | Jan 26 | Dec 16 | 324 |
| Saint Johns | May 2 | Oct 14 | 165 |
| San Carlos Reservoir | Mar 13 | Nov 19 | 251 |
| San Manuel | Feb 4 | Dec 8 | 307 |
| San Simon | Apr 16 | Nov 2 | 200 |
| Sanders | May 22 | Oct 8 | 139 |
| Santa Rita Experiment Range | Feb 25 | Dec 5 | 283 |
| Sasabe | Mar 21 | Nov 20 | 244 |
| Scottsdale Municipal Airport | Jan 6 | Dec 26 | 354 |
| Sedona | Apr 1 | Nov 17 | 230 |
| Seligman | May 10 | Oct 15 | 158 |
| Show Low Airport | May 5 | Oct 15 | 163 |
| Sierra Vista | Apr 5 | Nov 9 | 218 |
| Snowflake | May 11 | Oct 10 | 152 |
| Sonoita | Mar 28 | Nov 21 | 238 |
| South Phoenix | Jan 21 | Dec 16 | 329 |
| Springerville | Jun 1 | Sep 26 | 117 |
| St Johns Industrial Airport | May 3 | Oct 10 | 160 |
| Stewart Mountain Dam | Feb 13 | Dec 5 | 295 |
| Sunrise Mountain | Jun 18 | Sep 18 | 92 |
| Sunset Crater Nm | Jun 16 | Sep 19 | 95 |
| Superior | Jan 18 | Dec 28 | 344 |
| Tacna 3 NE | Feb 13 | Dec 1 | 291 |
| Teec Nos Pos | Apr 11 | Nov 1 | 204 |
| Tempe Asu | Feb 13 | Dec 5 | 295 |
| Temple Bar | Feb 4 | Dec 10 | 309 |
| Tohono Chul | Feb 26 | Dec 4 | 281 |
| Tombstone | Mar 4 | Nov 29 | 270 |
| Tuba City | Apr 16 | Oct 28 | 195 |
| Tucson | Jan 20 | Dec 17 | 331 |
| Tucson 11 W | Feb 8 | Dec 10 | 305 |
| Tucson 17 NW | Feb 23 | Dec 6 | 286 |
| Tucson Camp Ave Experiment | Feb 20 | Nov 27 | 280 |
| Tucson International Airport | Feb 5 | Dec 9 | 307 |
| Tucson U Of A #1 | Feb 11 | Dec 2 | 294 |
| Tumacacori Nm | Apr 5 | Nov 10 | 219 |
| Tuzigoot | Mar 30 | Nov 10 | 225 |
| Twin Arrows | Apr 14 | Oct 25 | 194 |
| Wahweap | Mar 14 | Nov 16 | 247 |
| Walnut Canyon Nm | May 13 | Oct 6 | 146 |
| Walnut Creek | May 24 | Oct 7 | 136 |
| Wickenburg | Mar 7 | Nov 20 | 258 |
| Wikieup | Mar 19 | Nov 23 | 249 |
| Willcox | Apr 9 | Oct 31 | 205 |
| Williams | May 22 | Oct 5 | 136 |
| Williams 35 NNW | May 9 | Oct 19 | 163 |
| Willow Beach | Jan 7 | Dec 29 | 356 |
| Window Rock Airport | May 29 | Sep 28 | 122 |
| Winslow Municipal Airport | Apr 27 | Oct 18 | 174 |
| Wittmann 1 SE | Feb 5 | Dec 11 | 309 |
| Wupatki Nm | Apr 7 | Nov 3 | 210 |
| Youngtown | Jan 20 | Dec 15 | 329 |
| Yucca 1 NNE | Feb 18 | Dec 2 | 287 |
| Yuma 27 ENE | Jan 11 | Dec 21 | 344 |
| Yuma Proving Ground | Jan 4 | Dec 25 | 355 |
| Yuma Quartermaster Depot | Jan 8 | Dec 28 | 354 |
Each date is the median: in half of years the frost comes earlier, in half later. Frost here means a low of 32°F or colder at the station. Low spots and valleys often frost a week or two earlier than these dates; hillsides and city centers later.
Source: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020. The Field almanac also shows how often frost comes early or late, and a reanalysis reading for your exact location.