Frost dates · USDA zone 10a
Frost dates for Bullhead City, AZ
Bullhead City, AZ sees its last 32 °F night of spring around January 4 and its first of fall around December 23 — a 356-day freeze-free season in a typical year.
Pick a sauce; the Plan Builder runs this station's dates and hands back the calendar, plant count and gear list.
Freeze odds, by date
| Odds | Last spring freeze after | First fall freeze before |
|---|---|---|
| 9 years in 10 | Dec 12 (prior winter) | Jan 23 (next year) |
| Median — 1 year in 2 | Jan 4 | Dec 23 |
| 1 year in 10 | Feb 5 | Dec 1 |
The top row is the risky edge: in 9 years of 10 a spring freeze still comes after it, so tender transplants set out then need cover. The bottom row is the cautious date — only 1 year in 10 freezes after it — and the one to plan uncovered tender transplants against. Freeze-free season: 356 days median, at least 323 in 9 years of 10, no freeze at all in 1 year of 10. NOAA ranks season length year by year, so it is not the gap between two rows above. A hard freeze (28 °F) has a median last date of Dec 26 (prior winter) and first of Dec 25.
Bullhead City planting calendar, 2027
Every row runs from the median last frost (Jan 4) and median first frost (Dec 23) above, using each cultivar's days to maturity. Same engine as the Plan Builder.
| Crop | Start indoors | Transplant / plant | First harvest | Days |
|---|---|---|---|---|
| Hardneck GarlicSiberian (porcelain hardneck) | — | Oct 15prior fall | Jun 12 | 240 from sow |
| Spanish OnionYellow Sweet Spanish (long-day) | Oct 12 | Dec 7 | Mar 27 | 110 from transplant |
| Mustard greensGarnet Giant (Brassica juncea) | Direct sow | Jan 4 | Feb 3 | 30 from sow |
| CilantroSlow Bolt (Coriandrum sativum) | Dec 21 | Dec 21 | Feb 4 | 45 from sow |
| Genovese BasilGenovese | Dec 7 | Jan 18 | Mar 19 | 60 from transplant |
| CayenneLong Slim Cayenne (Capsicum annuum) | Nov 9 | Jan 11 | Mar 27 | 75 from transplant |
| HabaneroOrange Habanero (Capsicum chinense) | Oct 26 | Jan 18 | Apr 23 | 95 from transplant |
| JalapeñoEarly Jalapeño (Capsicum annuum) | Nov 9 | Jan 11 | Mar 27 | 75 from transplant |
| Marconi Red PepperMarconi Red (Capsicum annuum) | Nov 9 | Jan 11 | Apr 1 | 80 from transplant |
| SerranoSerrano Tampiqueño (Capsicum annuum) | Nov 9 | Jan 11 | Apr 1 | 80 from transplant |
| Nantes CarrotScarlet Nantes | Dec 21 | Dec 21 | Mar 1 | 70 from sow |
| TomatilloToma Verde | Nov 23 | Jan 11 | Mar 22 | 70 from transplant |
| Roma TomatoRoma VF (determinate paste) | Nov 23 | Jan 11 | Mar 27 | 75 from transplant |
| San Marzano TomatoSan Marzano (indeterminate paste) | Nov 23 | Jan 11 | Apr 1 | 80 from transplant |
Tight means first harvest lands within two weeks of the median first fall frost: start that crop indoors on time or cover it in fall.
What sauce can Bullhead City grow?
Each sauce, scheduled for a Bullhead City container garden: when the first seeds go in and when enough fruit has ripened for one batch.
Bullhead City frost questions
When is the last frost in Bullhead City, AZ?
The median last 32 °F freeze at BULLHEAD CITY, AZ is January 4: half of years see a later one. One year in ten, a freeze still comes after February 5; nine years in ten, it comes after December 12 (prior winter). Source: NOAA NCEI 1991–2020 U.S. Climate Normals.
When is the first frost in Bullhead City, AZ?
The median first 32 °F freeze of fall is December 23. One year in ten it arrives before December 1; nine years in ten, before January 23 (next year).
How long is the growing season in Bullhead City, AZ?
356 days between the last spring and first fall 32 °F freeze in a median year. Nine years in ten the season runs at least 323 days; one year in ten, no freeze at all.
What growing zone is Bullhead City, AZ?
USDA hardiness zone 10a, per the 2023 USDA Plant Hardiness Zone Map for ZIP 86442. A zone describes the coldest winter night, not when frost ends, so it is the wrong number for a planting calendar — the frost dates on this page are the right one.
When should I plant tomatoes in Bullhead City, AZ?
Start Roma VF (determinate paste) seeds indoors around Nov 23 and transplant around Jan 11, 1 week after the median last frost. To cut the freeze risk to one year in ten, wait for Feb 5. First ripe fruit lands around Mar 27.
When should I plant peppers in Bullhead City, AZ?
Sow jalapeño indoors on a heat mat around Nov 9; transplant no earlier than Jan 11, and wait past it until nights hold above 50 °F — that can run weeks later. First green pods around Mar 27.
Nearby in Arizona
- Lake Havasu Citylast frost Jan 5
- Prescottlast frost Apr 30
- Prescott Valleylast frost Apr 30
- Surpriselast frost Feb 5
- Peorialast frost Feb 5
- Buckeyelast frost Jan 7
All Arizona frost dates → · How frost-date math drives a sowing calendar →