CannaGLAP
Grow cannabis in Los Gatos, CA
Growing cannabis in Los Gatos: a mild summer town with a real winter freeze
Los Gatos is easy on a grow from May through October. Winter is colder than those summers suggest. In an average year about 13 nights freeze, and the two coldest months bring nights near 40°F.
That cold lands hardest where a tent often ends up: a detached garage, a shed, a back room the furnace barely reaches. So before the first frosty week, ask: does your grow space warm up with the house, or cool down with the weather?
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.
A Los Gatos grow room through frost and late heat
The Los Gatos station sits 0.3 miles from town at 365 feet, so its numbers read close to your own yard. Its freezing nights cluster in December and January, about 5 in each. In an unheated garage the cold reaches the pots first, through the concrete, and roots in chilled soil take up water slowly.
Set pots on a board or rack instead of the slab, and put a seedling mat under young plants. Run the light from late evening into midmorning, the hours most likely to freeze. A closed, cold garage also stays damp, since January air averaged 81 percent in 2024. A heated house dries that out; a cold garage with buds in the tent usually needs a small dehumidifier.
Summer asks for the opposite, but gently. The station counts about 27 afternoons a year at 90°F or hotter, from June through September, and September carries nearly as many as July. July nights fall to about 56°F, close to 30 degrees under the afternoon. A night lamp schedule and an intake fan pulling that cooler air handle most of the heat.
Moisture climbs through the warm months. In 2024 the air sat at 50 percent in June, dry enough that fresh clones want a dome. It rose to 63 in September, the dampest of the June to October months measured. A late September finish needs a fan moving air through the canopy.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 59 | 62 | 66 | 70 | 76 | 82 | 85 | 85 | 83 | 76 | 65 | 58 |
| Avg low °F | 40 | 41 | 43 | 45 | 49 | 53 | 56 | 56 | 54 | 49 | 43 | 40 |
| Humidity % | 81 | 50 | 53 | 59 | 63 | 49 |
Highs and lows: NOAA 1991 to 2020 normals, Los Gatos station (0.3 miles away). Humidity: Open-Meteo historical model data, average daily humidity in 2024, for the months shown. Planning averages, not a forecast.
Outdoors in Los Gatos: cool at both ends
California sets the limit at 6 living plants per private residence, however many adults share it, and the plants must be locked up and hidden from public view. Cities and counties can set reasonable rules for indoor grows without banning them, and can ban outdoor grows, so read the rules that govern your particular address.
Where a yard grow is allowed, start photoperiod seeds (plants that flower as nights lengthen) indoors March 4 to 18 and plant out from April 15. Autoflowers need only a week or so indoors first. Frost usually ends by early February, though one spring in ten it comes after March 14. Nights average 50°F only from about May 21 to October 9, so growth starts slowly. Frost has arrived by November 16 one fall in ten, about 215 days after planting, and in 2024 October was drier than September, at 49 percent.
| Last spring frost | Feb 2 in a typical year, Mar 14 to be safe (later only 1 year in 10) |
|---|---|
| First fall frost | Dec 6 typical, as early as Nov 16 (1 year in 10) |
| Frost-free season | about 310 days |
| Nights stay 50°F or warmer | May 21 to Oct 9 |
| Start seeds or clones indoors | Mar 4 to Mar 18 |
| Move plants outdoors | Apr 15 or later |
Your Los Gatos grow, kept to yourself
Los Gatos is a walking town. Weekend crowds fill the farmers market and the blocks around North Santa Cruz Avenue and Main Street, and garden talk starts easily there. If you have worked out how to carry a run through a frosty South Bay winter, that answer is yours to share or keep.
Canna GLAP encrypts each grow entry on the phone, and only then sends it, so our servers store something they cannot unlock. Someone who broke in would leave with grow records that read as noise. That covers the journal, not the garage: a lamp glowing through a window is yours to cover.
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 Los Gatos ask
Does Los Gatos get frost?
Yes, mostly in December and January. The typical last spring frost comes around February 2 and the typical first fall frost around December 6.
How do I keep a garage grow warm in a Los Gatos winter?
Lift the pots off the concrete, give young roots a seedling mat, and run the lamp through the coldest hours of the night. Add a small dehumidifier if the garage stays closed and damp.
When should I harvest outdoor cannabis in Los Gatos?
An October finish suits the town: in 2024 the air was drier then than in September. The cost is cooler nights, which can slow ripening, but frost rarely arrives before mid November.
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