CannaGLAP
Grow cannabis in Santa Ana, CA
Growing cannabis in Santa Ana: the hot days come in fall, not early summer
Santa Ana gives you almost no winter to plan around. The fire station weather station, a tenth of a mile from the city center at 135 feet, records about 0.1 freezing days a year, and December, the coldest month, still averages a low near 48°F.
What it does have is a warm, late fall. June brings about 1 day at 90°F. August and September bring about 7 each, and October still about 5. If your plants flower in the fall, is your tent cooled for the months that are actually hot?
Adults 21 and over: yes. Plant limit: 6 living plants per private residence, however many adults live there.
Locked space, not visible from a public place; cities and counties can set reasonable rules for indoor grows (but cannot ban them) and may ban outdoor grows; a landlord may prohibit growing on a rental. Source: Department of Cannabis Control; conditions: Prop 64 text as passed in 2016 (H&S Code 11362.2 and 11362.45). Local rules (landlords, HOAs, city codes) can add more; this is a summary, not legal advice.
Santa Ana indoors: cool the tent for August through October
Afternoon highs climb from about 78°F in June to 85 in August and 84 in September, and October still averages 79. A garage tent near downtown's 4th Street, or anywhere in central Orange County, that coasted through spring can top 90 inside once those afternoons arrive. Give the garage a path for exhaust to leave, and if the tent takes direct afternoon heat, move the lamp to the night hours from August through October.
Humidity here barely moves: about 73 percent in January, 72 in June, 70 in August and 68 in October. That steadiness cuts both ways. Seedlings and clones rarely need a humidifier, but nothing in the weather dries a flower room for you either, so keep a fan under the canopy and an air conditioner or small dehumidifier ready for the last weeks of flower.
Winter is the easy stretch. Nights sit near 48 to 50°F from December through February, so a heat mat for young plants is about the only cold-weather gear a tent needs, and a cool garage can run its lamp through the day without overheating.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 69 | 69 | 71 | 73 | 75 | 78 | 83 | 85 | 84 | 79 | 74 | 68 |
| Avg low °F | 49 | 50 | 52 | 54 | 58 | 61 | 65 | 65 | 64 | 59 | 53 | 48 |
| Humidity % | 73 | 72 | 73 | 70 | 69 | 68 |
Highs and lows: NOAA 1991 to 2020 normals, Santa Ana Fire Stn station (0.1 miles away). Humidity: Open-Meteo historical model data, average daily humidity in 2024, for the months shown. Planning averages, not a forecast.
Santa Ana outdoors: check the local rules first
California allows 6 living plants per private residence, however many adults live there, kept in a locked space that is not visible from a public place. Cities and counties can regulate home grows and may ban outdoor growing, so look up Santa Ana's current rules before anything goes in the ground.
Where outdoor growing is open to you, start seeds March 4 to March 18 and plant out on April 15. Frost is not the limit here; heat is. Plants set out in April flower through the August to October stretch, when afternoon highs run 79 to 85°F with about 5 to 7 days a month at 90 or above. Use large containers or in-ground beds, mulch the soil, water early in the day and rig some afternoon shade for the hottest spells.
| Frost | Rare: less than 1 freezing night a year on average |
|---|---|
| Nights stay 50°F or warmer | Feb 22 to Dec 3 |
| Start seeds or clones indoors | Mar 4 to Mar 18 |
| Move plants outdoors | Apr 15 or later |
Close neighbors, private records
In a city this size, neighbors are close: shared walls, garages side by side, a landlord with a key. Some of them will know you grow, and that is fine. Your notes on the phenotype that held up through an October heat spell, or what six plants actually yielded, are another matter, and they belong with you.
Before anything uploads, Canna GLAP scrambles the grow records on your phone. Break into our servers and the Santa Ana grow records you find are ciphertext, with no key sitting beside them.
What is encrypted: your plants, notes, photos, feed logs and harvests. What is not: account details (such as your email, name and plan), a grow name or town if you type one, your team, and your sensors' names. The full list: what a hacker would get.
Questions growers in Santa Ana ask
Can I grow cannabis outdoors in Santa Ana?
State law allows it in a locked space not visible from a public place, within 6 living plants per residence, but cities and counties can regulate and may ban outdoor grows. Check Santa Ana's own rules before planting outside.
Does Santa Ana get frost?
Almost never. The station a tenth of a mile from the city center averages about 0.1 freezing days a year, and nights average 45°F or warmer all year round.
What is the hottest stretch for a Santa Ana grow?
August and September, which average roughly 7 days apiece at 90°F and up. October still averages about 5. June brings only about 1.
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