Jerome, AZ frost dates
Last spring frostMar 26median date
First fall frostNov 25median date
Growing season244 daysfrost-free
Hardiness zone8bZone 8b
How Jerome compares
- In 8 years out of 10, the last spring frost in Jerome falls between February 28 and April 19, a 50-day window. The first fall frost falls between November 4 and December 10.
- The median last frost is 21 days earlier than the Arizona median of Apr 16.
- Its 244-day growing season is longer than 78% of the 193 Arizona places with a regular frost season (state median 197 days).
- The last frost is 10 days later than the zone 8b median of Mar 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 8b chart.
- The weather station records an average of 36 nights a year at or below 32°F.
- Compared with Flagstaff, AZ, 65 km away, the last frost here is 70 days earlier than there and the growing season is 128 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 28 |
| 50% (median) | March 26 |
| 10% (safe for tender plants) | April 19 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 4 |
| 50% (median) | November 25 |
| 90% (late) | December 10 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Jerome, AZ
Jerome, AZ frost dates — last frost Mar 26, first frost Nov 25, zone 8b. whenisthelastfrost.com
Crop
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Start indoors: Jan 1 to Jan 15Transplant outside: Feb 26 to Mar 12
Start indoors: Jan 15 to Jan 29Transplant outside: Apr 9 to Apr 23
Start indoors: Jan 15 to Jan 29Transplant outside: Apr 9 to Apr 23
Start indoors: Jan 29 to Feb 12Transplant outside: Apr 2 to Apr 16
Start indoors: Jan 29 to Feb 12Transplant outside: Mar 5 to Mar 19Sow outdoors: Feb 26 to Apr 2Plant for fall: Sep 30 to Oct 28
Start indoors: Jan 29 to Feb 12Transplant outside: Feb 26 to Mar 12Sow outdoors: Feb 26 to Mar 12Plant for fall: Sep 16 to Oct 7
Start indoors: Jan 29 to Feb 12Transplant outside: Mar 12 to Mar 26Plant for fall: Aug 19 to Sep 9
Start indoors: Jan 29 to Feb 12Transplant outside: Mar 5 to Mar 19Plant for fall: Aug 19 to Sep 9
Start indoors: Jan 29 to Feb 12Transplant outside: Mar 12 to Mar 26Plant for fall: Aug 19 to Sep 9
Start indoors: Feb 12 to Feb 26Transplant outside: Apr 16 to Apr 30Sow outdoors: Apr 16 to Apr 30
Start indoors: Feb 12 to Feb 26Transplant outside: Apr 2 to Apr 16
Sow outdoors: Feb 12 to Mar 5Plant for fall: Sep 2 to Sep 23
Sow outdoors: Feb 12 to Mar 5Plant for fall: Sep 30 to Oct 21
Sow outdoors: Feb 19 to Apr 2Plant for fall: Oct 14 to Nov 4
Start indoors: Feb 26 to Mar 5Transplant outside: Apr 9 to Apr 16Sow outdoors: Apr 2 to Apr 16Plant for fall: Sep 9 to Sep 23
Start indoors: Feb 26 to Mar 5Sow outdoors: Apr 2 to Apr 16Plant for fall: Sep 16 to Sep 30
Start indoors: Feb 26 to Mar 5Sow outdoors: Apr 2 to Apr 16
Start indoors: Feb 26 to Mar 5Transplant outside: Apr 9 to Apr 23
Sow outdoors: Mar 5 to Apr 2Plant for fall: Sep 2 to Sep 16
Sow outdoors: Mar 5 to Apr 2Plant for fall: Sep 16 to Sep 30
Sow outdoors: Mar 5 to Mar 26
Sow outdoors: Mar 12 to Apr 9Plant for fall: Sep 16 to Sep 30
Sow outdoors: Mar 12 to Apr 2Plant for fall: Sep 30 to Oct 21
Sow outdoors: Apr 2 to Apr 23Plant for fall: Sep 9 to Sep 23
Sow outdoors: Apr 2 to Apr 16
Transplant outside: Apr 9 to Apr 30
Plant for fall: Nov 11 to Dec 16
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Jerome, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 1 – Jan 15 | Feb 26 – Mar 12 | — | — |
| Peppers | Jan 15 – Jan 29 | Apr 9 – Apr 23 | — | — |
| Eggplant | Jan 15 – Jan 29 | Apr 9 – Apr 23 | — | — |
| Tomatoes | Jan 29 – Feb 12 | Apr 2 – Apr 16 | — | — |
| Lettuce | Jan 29 – Feb 12 | Mar 5 – Mar 19 | Feb 26 – Apr 2 | Sep 30 – Oct 28 |
| Kale | Jan 29 – Feb 12 | Feb 26 – Mar 12 | Feb 26 – Mar 12 | Sep 16 – Oct 7 |
| Broccoli | Jan 29 – Feb 12 | Mar 12 – Mar 26 | — | Aug 19 – Sep 9 |
| Cabbage | Jan 29 – Feb 12 | Mar 5 – Mar 19 | — | Aug 19 – Sep 9 |
| Cauliflower | Jan 29 – Feb 12 | Mar 12 – Mar 26 | — | Aug 19 – Sep 9 |
| Okra | Feb 12 – Feb 26 | Apr 16 – Apr 30 | Apr 16 – Apr 30 | — |
| Basil | Feb 12 – Feb 26 | Apr 2 – Apr 16 | — | — |
| Peas | — | — | Feb 12 – Mar 5 | Sep 2 – Sep 23 |
| Spinach | — | — | Feb 12 – Mar 5 | Sep 30 – Oct 21 |
| Radishes | — | — | Feb 19 – Apr 2 | Oct 14 – Nov 4 |
| Cucumbers | Feb 26 – Mar 5 | Apr 9 – Apr 16 | Apr 2 – Apr 16 | Sep 9 – Sep 23 |
| Zucchini & Summer Squash | Feb 26 – Mar 5 | — | Apr 2 – Apr 16 | Sep 16 – Sep 30 |
| Winter Squash & Pumpkins | Feb 26 – Mar 5 | — | Apr 2 – Apr 16 | — |
| Melons & Watermelon | Feb 26 – Mar 5 | Apr 9 – Apr 23 | — | — |
| Carrots | — | — | Mar 5 – Apr 2 | Sep 2 – Sep 16 |
| Beets | — | — | Mar 5 – Apr 2 | Sep 16 – Sep 30 |
| Potatoes | — | — | Mar 5 – Mar 26 | — |
| Swiss Chard | — | — | Mar 12 – Apr 9 | Sep 16 – Sep 30 |
| Cilantro | — | — | Mar 12 – Apr 2 | Sep 30 – Oct 21 |
| Green Beans | — | — | Apr 2 – Apr 23 | Sep 9 – Sep 23 |
| Sweet Corn | — | — | Apr 2 – Apr 16 | — |
| Sweet Potatoes | — | Apr 9 – Apr 30 | — | — |
| Garlic | — | — | — | Nov 11 – Dec 16 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Jerome, AZ weather station, about 1 km away (elevation 4,951 ft (1,509 m)).
Frost dates near Jerome
- Clarkdale Mar 30 · Nov 10
- Cottonwood Mar 30 · Nov 10
- Cornville Mar 30 · Nov 10
- Prescott Valley Apr 20 · Oct 27
- Sedona (Yavapai) Apr 20 · Oct 27
- Dewey Apr 30 · Oct 20
- Humboldt Apr 30 · Oct 20
- Camp Verde Apr 16 · Oct 30
- Lake Montezuma Apr 16 · Oct 30
- Sedona Apr 1 · Nov 17
Frequently asked questions
When is the last frost in Jerome, AZ?
The median last spring frost in Jerome, AZ is March 26. There is still about a 10% chance of frost after April 19, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Jerome, AZ?
The median first fall frost is November 25, with about a 10% chance of frost before November 4.
How long is the growing season in Jerome, AZ?
About 244 days between the median last spring frost and first fall frost.
What planting zone is Jerome, AZ?
Jerome, AZ is in USDA hardiness zone 8b.