CannaGLAP
Grow cannabis in West Covina, CA
Growing cannabis in West Covina: October is as hot as June, right when buds ripen
In West Covina, summer does not end on Labor Day. The San Gabriel fire station, 9.3 miles away at 363 feet, averages an 81°F high in October, the same as June, and counts about 7 days that month at 90°F or hotter. June gets about 5.
In June a plant is still in veg and can shrug that off. In October it is ripening. So before you plan a run, ask which month your buds will spend their last weeks in.
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 West Covina grow room through a long hot season
Count the hot afternoons the way your plants will meet them. The station logs about 11 days at 90°F in July, 17 in August, 14 in September and 7 in October, roughly 64 across the year. A tent in a garage near Cameron Park or a spare room off South Glendora Avenue stacks lamp heat on top of that. Run the lights from late evening into morning from June through October, so the lamps rest while the afternoon peaks.
Night air helps less in midsummer than in fall. July and August lows average about 65 and 66°F, so an intake fan at 2 a.m. buys only a little cooling, and a window air conditioner earns its place. By October lows fall to about 57°F, and after-dark air becomes a real cooling tool again for a crop near harvest.
There is another way around the heat: schedule a run so it flowers in winter. The average night here stays at 45°F or warmer all year, and the station counts about 1.2 freezing nights a year, so lamps that run through the coldest hours and a seedling mat for young plants handle December and January. Humidity is the easy part in any season. It ran 58 to 62 percent from July through October in 2024, so heat, not mold, is the thing to manage.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 69 | 68 | 71 | 74 | 76 | 81 | 86 | 88 | 87 | 81 | 74 | 68 |
| Avg low °F | 46 | 47 | 51 | 53 | 58 | 62 | 65 | 66 | 64 | 57 | 51 | 45 |
| Humidity % | 71 | 67 | 62 | 59 | 61 | 58 |
Highs and lows: NOAA 1991 to 2020 normals, San Gabriel Fire Dept. station (9.3 miles away). Humidity: Open-Meteo historical model data, average daily humidity in 2024, for the months shown. Planning averages, not a forecast.
West Covina outdoors: a hot finish to plan for
Six living plants is California's ceiling for a private residence, whatever the number of adults inside, and they belong behind a lock where nobody in a public place can spot them. The state lets cities and counties set outdoor rules or prohibit outdoor plants entirely, so confirm what the local rules for your address allow. If yours permit it, sow from March 4 through March 18 and plant out from April 15; the average night stays at or above 50°F from March 11 until November 19.
A spring-planted photoperiod plant flowers straight into the heat, with about 21 days at 90°F across September and October. Afternoon shade, mulch over the roots, deep morning watering and large containers carry it through, and so does a strain chosen for a hot finish.
| Frost | Rare: about 1.2 freezing nights a year |
|---|---|
| Nights stay 50°F or warmer | Mar 11 to Nov 19 |
| Start seeds or clones indoors | Mar 4 to Mar 18 |
| Move plants outdoors | Apr 15 or later |
Night markets, movie nights, and a grow log nobody else reads
West Covina gathers often: the night market at Historic Hurst Ranch, Friday Night Movies in the Park, National Night Out. Gardens come up in conversation, and a heavy October harvest makes a good story. The details that produced it are another matter.
Canna GLAP encrypts your grow journal on the phone before it ever uploads. An intruder in our servers would come away with scrambled grow records and nothing to decode them. What your grow has taught you is yours to share with a roommate, a landlord or the grower at the next table, or to keep.
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 West Covina ask
How hot does West Covina get in October?
The San Gabriel fire station, 9.3 miles away, averages an 81°F high in October with about 7 days at 90°F, a little more than June's 5.
When should I set cannabis plants outside in West Covina?
From April 15, after starting seeds indoors March 4 to March 18, if local law permits outdoor plants. Keep them behind a lock and hidden from public view, with 6 living plants per residence at most.
Do I need a dehumidifier in West Covina?
Humidity averaged 58 to 62 percent from July through October in 2024, so cooling is the bigger job. Late buds still prefer drier air than that, so a small unit in the flower tent helps.
Growing near West Covina
- Grow cannabis in Baldwin Park, CA 2 miles
- Grow cannabis in Covina, CA 3 miles
- Grow cannabis in La Puente, CA 3 miles
- Grow cannabis in Azusa, CA 5 miles
- Grow cannabis in El Monte, CA 5 miles
All California cities · Every state where adults may grow at home