Frost dates for Litchfield Park, AZ
At Litchfield Park, the median last spring frost (32°F) is Jan 7 and the median first fall frost is Dec 24, for a typical growing season of 351 days. For a 90% chance that the last frost has passed, wait until Feb 5. Nearby ZIP codes are in USDA hardiness zone 9b.
- Jan 7Last spring frost (median)50% chance of 32°F after this date
- Feb 5Safer planting date10% chance of 32°F after this date
- Dec 24First fall frost (median)50% chance of 32°F by this date
- 351 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 | Jan 4 | Jan 31 | Feb 24 |
| 32°F | Dec 17 | Jan 7 | Feb 5 |
| 28°F | Dec 21 | Jan 5 | Jan 22 |
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 | Nov 24 | Dec 9 | Dec 28 |
| 32°F | Dec 6 | Dec 24 | Jan 16 |
| 28°F | Dec 18 | Jan 4 | Jan 21 |
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 | 285 days | 313 days | 343 days |
| 32°F | 320 days | 351 days | 365 days |
| 28°F | 356 days | 365 days | 365 days |
| 24°F | 365 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 99% |
| 32°F | 77% |
| 28°F | 20% |
| 24°F | 2% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 85309 | 9b | 25 to 30°F | 4 km |
| 85395 | 9b | 25 to 30°F | 4 km |
| 85392 | 9b | 25 to 30°F | 6 km |
| 85340 | 9b | 25 to 30°F | 6 km |
| 85307 | 9b | 25 to 30°F | 6 km |
| 85037 | 9b | 25 to 30°F | 9 km |
| 85323 | 9b | 25 to 30°F | 10 km |
| 85329 | 9b | 25 to 30°F | 10 km |
| 85355 | 9b | 25 to 30°F | 12 km |
| 85353 | 9b | 25 to 30°F | 12 km |
| 85033 | 9b | 25 to 30°F | 14 km |
| 85338 | 9b | 25 to 30°F | 15 km |
| 85343 | 9b | 25 to 30°F | 35 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 USC00024977, at 33.4992, -112.3631, elevation 317 m (1,040 ft).
- Data quality: Representative (10+ years), 22 years of freeze data.
- Average days per year at or below 32°F: 7.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Youngtown (12 km)
- Laveen 3 SSE (27 km)
- South Phoenix (30 km)
- Phoenix Deer Valley Muni Airport (33 km)
- Phoenix Sky Harbor Intl Airport (34 km)
- Wittmann 1se (34 km)
- Tempe Asu (42 km)
- Scottsdale Muni Airport (44 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.