Frost dates · USDA zone 9b
Frost dates for Perris, CA
Perris, CA sees its last 32 °F night of spring around January 10 and its first of fall around January 2 (next year) — a 365-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 20 (prior winter) | Feb 7 (next year) |
| Median — 1 year in 2 | Jan 10 | Jan 2 (next year) |
| 1 year in 10 | Feb 17 | Dec 11 |
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: 365 days median, at least 334 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.
Perris planting calendar, 2027
Every row runs from the median last frost (Jan 10) and median first frost (Jan 2) 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 18 | Dec 13 | Apr 2 | 110 from transplant |
| Mustard greensGarnet Giant (Brassica juncea) | Direct sow | Jan 10 | Feb 9 | 30 from sow |
| CilantroSlow Bolt (Coriandrum sativum) | Dec 27 | Dec 27 | Feb 10 | 45 from sow |
| Genovese BasilGenovese | Dec 13 | Jan 24 | Mar 25 | 60 from transplant |
| CayenneLong Slim Cayenne (Capsicum annuum) | Nov 15 | Jan 17 | Apr 2 | 75 from transplant |
| HabaneroOrange Habanero (Capsicum chinense) | Nov 1 | Jan 24 | Apr 29 | 95 from transplant |
| JalapeñoEarly Jalapeño (Capsicum annuum) | Nov 15 | Jan 17 | Apr 2 | 75 from transplant |
| Marconi Red PepperMarconi Red (Capsicum annuum) | Nov 15 | Jan 17 | Apr 7 | 80 from transplant |
| SerranoSerrano Tampiqueño (Capsicum annuum) | Nov 15 | Jan 17 | Apr 7 | 80 from transplant |
| Nantes CarrotScarlet Nantes | Dec 27 | Dec 27 | Mar 7 | 70 from sow |
| TomatilloToma Verde | Nov 29 | Jan 17 | Mar 28 | 70 from transplant |
| Roma TomatoRoma VF (determinate paste) | Nov 29 | Jan 17 | Apr 2 | 75 from transplant |
| San Marzano TomatoSan Marzano (indeterminate paste) | Nov 29 | Jan 17 | Apr 7 | 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 Perris grow?
Each sauce, scheduled for a Perris container garden: when the first seeds go in and when enough fruit has ripened for one batch.
Perris frost questions
When is the last frost in Perris, CA?
The median last 32 °F freeze at RIVERSIDE CITRUS EXP, CA is January 10: half of years see a later one. One year in ten, a freeze still comes after February 17; nine years in ten, it comes after December 20 (prior winter). Source: NOAA NCEI 1991–2020 U.S. Climate Normals.
When is the first frost in Perris, CA?
The median first 32 °F freeze of fall is January 2 (next year). One year in ten it arrives before December 11; nine years in ten, before February 7 (next year).
How long is the growing season in Perris, CA?
NOAA counts a full 365-day freeze-free season at RIVERSIDE CITRUS EXP, CA in a typical year. What limits a sauce garden here is heat: peppers and tomatoes drop flowers in sustained hot nights, so plant to finish before peak summer or after it breaks.
What growing zone is Perris, CA?
USDA hardiness zone 9b, per the 2023 USDA Plant Hardiness Zone Map for ZIP 92571. 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 Perris, CA?
Start Roma VF (determinate paste) seeds indoors around Nov 29 and transplant around Jan 17, 1 week after the median last frost. To cut the freeze risk to one year in ten, wait for Feb 17. First ripe fruit lands around Apr 2.
When should I plant peppers in Perris, CA?
Sow jalapeño indoors on a heat mat around Nov 15; transplant no earlier than Jan 17, and wait past it until nights hold above 50 °F — that can run weeks later. First green pods around Apr 2.
Nearby in California
- Menifeelast frost Jan 28
- Moreno Valleylast frost Jan 10
- Lake Elsinorelast frost Jan 28
- San Jacintolast frost Jan 31
- Hemetlast frost Jan 31
- Riversidelast frost Jan 9
All California frost dates → · How frost-date math drives a sowing calendar →