Frost dates for Monument Valley, AZ
At Monument Valley, the median last spring frost (32°F) is Apr 10 and the median first fall frost is Nov 1, for a typical growing season of 205 days. For a 90% chance that the last frost has passed, wait until Apr 30. Nearby ZIP codes are in USDA hardiness zones 7a to 8a.
- Apr 10Last spring frost (median)50% chance of 32°F after this date
- Apr 30Safer planting date10% chance of 32°F after this date
- Nov 1First fall frost (median)50% chance of 32°F by this date
- 205 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 6 | Apr 23 | May 9 |
| 32°F | Mar 20 | Apr 10 | Apr 30 |
| 28°F | Mar 4 | Mar 25 | Apr 14 |
| 24°F | Feb 16 | Mar 7 | Mar 31 |
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 5 | Oct 21 | Nov 5 |
| 32°F | Oct 17 | Nov 1 | Nov 16 |
| 28°F | Oct 27 | Nov 12 | Nov 26 |
| 24°F | Nov 6 | Nov 22 | Dec 6 |
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 | 160 days | 181 days | 201 days |
| 32°F | 181 days | 205 days | 229 days |
| 28°F | 204 days | 229 days | 255 days |
| 24°F | 230 days | 257 days | 282 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 84536 | 8a | 10 to 15°F | 18 km |
| 86535 | 7a | 0 to 5°F | 29 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 USC00025665, at 36.9853, -110.1200, elevation 1677 m (5,501 ft).
- Data quality: Representative (10+ years), 14 years of freeze data.
- Average days per year at or below 32°F: 105.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Betatakin (51 km)
- Teec Nos Pos (92 km)
- Lukachukai (101 km)
- Canyon De Chelly (106 km)
- Page Muni Airport (118 km)
- Page (118 km)
- Wahweap (122 km)
- Keams Canyon (131 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.