Last spring frost
Apr 9
Frost Dates for Pine, AZ
First fall frost
Nov 10
Growing season
211 days
Hardiness zone
8a
In an average year around Pine, AZ, the last spring frost (32°F) is about Apr 9 and the first fall frost is about Nov 10, giving roughly a 211-day growing season. To be safe most years, wait until Mar 17 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | May 19 | Apr 30 | Apr 8 |
| Freeze (32°F) | May 10 | Apr 9 | Mar 17 |
| Hard (28°F) | Apr 14 | Mar 16 | Feb 20 |
| Severe (24°F) | Mar 21 | Feb 19 | Jan 20 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 19 | May 14 | May 9 | May 4 | Apr 30 | Apr 26 | Apr 21 | Apr 15 | Apr 8 |
| 32°F | May 10 | Apr 30 | Apr 20 | Apr 15 | Apr 9 | Apr 5 | Apr 1 | Mar 28 | Mar 17 |
| 28°F | Apr 14 | Apr 4 | Mar 30 | Mar 24 | Mar 16 | Mar 11 | Mar 6 | Mar 1 | Feb 20 |
| 24°F | Mar 21 | Mar 9 | Mar 3 | Feb 25 | Feb 19 | Feb 13 | Feb 8 | Feb 1 | Jan 20 |
| 20°F | Feb 27 | Feb 18 | Feb 11 | Feb 4 | Jan 30 | Jan 23 | Jan 14 | Jan 6 | Dec 27 |
| 16°F | Feb 17 | Feb 11 | Feb 4 | Jan 26 | Jan 19 | Jan 12 | Jan 7 | Jan 3 | Dec 27 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Oct 14 | Oct 31 | Nov 14 |
| Freeze (32°F) | Oct 21 | Nov 10 | Nov 24 |
| Hard (28°F) | Nov 1 | Nov 20 | Dec 8 |
| Severe (24°F) | Nov 13 | Dec 5 | Dec 25 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 14 | Oct 19 | Oct 24 | Oct 28 | Oct 31 | Nov 3 | Nov 5 | Nov 9 | Nov 14 |
| 32°F | Oct 21 | Oct 29 | Nov 2 | Nov 6 | Nov 10 | Nov 14 | Nov 16 | Nov 19 | Nov 24 |
| 28°F | Nov 1 | Nov 9 | Nov 14 | Nov 18 | Nov 20 | Nov 24 | Nov 27 | Dec 2 | Dec 8 |
| 24°F | Nov 13 | Nov 20 | Nov 25 | Nov 30 | Dec 5 | Dec 9 | Dec 13 | Dec 18 | Dec 25 |
| 20°F | Nov 28 | Dec 5 | Dec 12 | Dec 17 | Dec 23 | Dec 28 | Jan 2 | Jan 11 | Jan 26 |
| 16°F | Dec 23 | Dec 30 | Jan 3 | Jan 6 | Jan 11 | Jan 17 | Jan 25 | Feb 3 | Feb 12 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Natural Brg, Az, about 4.5 miles away@if(!empty($station['elevation_ft'])), at 4,608 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Pine, AZ?
On average, the last spring frost (32°F) around Pine, AZ is about Apr 9. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 17.
When is the first frost in the fall?
The first fall frost around Pine, AZ typically arrives about Nov 10. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Apr 9 on average, or Mar 17 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 211 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 85544 Planting calendar → Arizona frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026