CannaGLAP
Grow cannabis in Hemet, CA
Growing cannabis in Hemet: the lamp runs at night in July and January, for opposite reasons
Hemet asks one grow room to handle two climates. The San Jacinto station, 3.4 miles away at 1,525 feet, averages about 120 afternoons of 90°F or more each year. The same station logs about 15 freezing nights, most of them from December through February, when lows sit near 39°F to 42°F.
In July, the lamp's heat is exactly what a tent cannot afford at 3 in the afternoon. In January, it is the heat the tent needs at 3 in the morning. Both point to the same schedule. Is yours set to it?
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.
One San Jacinto Valley grow room, two jobs
Summer is a heat problem with a cool way out. July and August average highs of 95°F and 97°F and bring about 27 and 29 days at 90°F, yet nights drop to about 64°F. That swing of more than 30 degrees is the tool: run the lamp from evening to morning and let the exhaust pull night air through the tent. A garage off Florida Avenue still heats up through the afternoon with the lamp off, so insulation or a small air conditioner protects the dark period.
The same air is dry. Humidity averaged 51 percent in June 2024, then fell to 38 in July and 39 in August. Seedlings and fresh clones can lose water faster than their roots replace it, so give them a dome or a small humidifier for their first two weeks, and check pots daily.
Winter keeps the night schedule for the opposite reason. December lows average about 39°F, and a garage or an unheated room drifts toward that by dawn. With the lamp on overnight, its heat lands in the coldest hours; add a heat mat below the seedlings and keep pots off the slab. January's 64 percent outdoor humidity drops inside a heated house, so winter rarely calls for a dehumidifier unless the room is unheated and damp.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 66 | 66 | 70 | 74 | 80 | 89 | 95 | 97 | 92 | 82 | 73 | 65 |
| Avg low °F | 40 | 42 | 45 | 48 | 53 | 58 | 64 | 64 | 61 | 53 | 44 | 39 |
| Humidity % | 64 | 51 | 38 | 39 | 44 | 36 |
Highs and lows: NOAA 1991 to 2020 normals, San Jacinto station (3.4 miles away). Humidity: Open-Meteo historical model data, average daily humidity in 2024, for the months shown. Planning averages, not a forecast.
Outdoors in Riverside County
The state limit is 6 living plants per private residence, regardless of how many adults live in it, grown in a locked spot hidden from public places. Hemet may add rules for outdoor plants or forbid them, so read the city's rules before you dig.
Where outdoor plants are allowed, get seeds going from March 4 through March 18 and transplant from April 15, well after a typical last frost of January 31 (February 28 to be safe). That leaves about 221 days before an early first frost on November 22. Fall humidity, 44 percent in September 2024 and 36 in October, works against mold. The cost is heat, about 22 days at 90°F in September and 10 in October, so water deeply in the morning and expect cut buds to dry quickly.
| Last spring frost | Jan 31 in a typical year, Feb 28 to be safe (later only 1 year in 10) |
|---|---|
| First fall frost | Dec 10 typical, as early as Nov 22 (1 year in 10) |
| Frost-free season | about 315 days |
| Nights stay 50°F or warmer | Apr 27 to Oct 26 |
| Start seeds or clones indoors | Mar 4 to Mar 18 |
| Move plants outdoors | Apr 15 or later |
Who reads your Hemet grow notes
Hemet has its gatherings: the Ramona Pageant at the Ramona Bowl, the Ramona Market, live shows at the Historic Hemet Theatre. Spend enough evenings around the San Jacinto Valley and you may meet other growers who ask how your run came out. A tent fan running all night can be heard next door, and encryption does nothing about that, or about the smell of a flowering plant.
What Canna GLAP covers is the journal. It encrypts your grow on the phone ahead of upload, so a thief inside our servers would turn up grow records in unreadable form, with no key alongside them. How you got a tent through August is yours to tell 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 Hemet ask
How hot does Hemet get for growing cannabis?
Hot. The San Jacinto station counts about 120 days of 90°F or more in an average year, about 29 of them in August, when highs average near 97°F. Nights fall to about 64°F, so run the lamp at night.
Does Hemet get frost?
Yes, about 15 freezing nights a year, mostly from December through February. A typical last frost is January 31, and the first fall frost can come by November 22.
When can I plant cannabis outside in Hemet?
From April 15, after starting seeds March 4 to March 18, if local law allows outdoor plants. That leaves about 221 days before an early first frost.
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