Frost dates for Chiricahua National Monument, AZ
At Chiricahua National Monument, the median last spring frost (32°F) is Apr 16 and the median first fall frost is Nov 8, for a typical growing season of 203 days. For a 90% chance that the last frost has passed, wait until Apr 30. Nearby ZIP codes are in USDA hardiness zones 8a to 8b.
- Apr 16Last spring frost (median)50% chance of 32°F after this date
- Apr 30Safer planting date10% chance of 32°F after this date
- Nov 8First fall frost (median)50% chance of 32°F by this date
- 203 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Apr 14 | Apr 28 | May 13 |
| 32°F | Mar 31 | Apr 16 | Apr 30 |
| 28°F | Mar 1 | Mar 31 | Apr 18 |
| 24°F | Jan 31 | Feb 28 | Apr 2 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Oct 14 | Oct 29 | Nov 11 |
| 32°F | Oct 21 | Nov 8 | Nov 23 |
| 28°F | Nov 1 | Nov 19 | Dec 4 |
| 24°F | Nov 14 | Dec 1 | Dec 19 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 162 days | 181 days | 202 days |
| 32°F | 182 days | 203 days | 225 days |
| 28°F | 204 days | 232 days | 264 days |
| 24°F | 237 days | 273 days | 310 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 85632 | 8a | 10 to 15°F | 17 km |
| 85625 | 8a | 10 to 15°F | 32 km |
| 85605 | 8b | 15 to 20°F | 35 km |
| 88056 | 8a | 10 to 15°F | 38 km |
| 85610 | 8b | 15 to 20°F | 42 km |
| 85606 | 8b | 15 to 20°F | 54 km |
| 88020 | 8a | 10 to 15°F | 56 km |
| 85607 | 8a | 10 to 15°F | 57 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00021664, at 32.0061, -109.3572, elevation 1615 m (5,300 ft).
- Data quality: Representative (10+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 72.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Paradise (15 km)
- Portal 4 SW (20 km)
- San Simon (34 km)
- Bowie (38 km)
- Pearce - Sunsites (46 km)
- Willcox (53 km)
- Mc Neal (54 km)
- Douglas Bisbee Inl Airport (65 km)
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.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.