CannaGLAP
Grow cannabis in Commack, NY
Growing cannabis in Commack: one hot month, and the damp that outlasts it
Commack's summer heat comes in a single block. At the Centerport station, 5 miles away at 30 feet, July averages about 6 afternoons at 90°F or hotter. June and August average about 2 each, the whole year about 11: more than half land in one month.
The damp is not so tidy. Humidity averaged 78 percent in both July and August 2024, then 75 in September. So which of your plants will face that July heat, and which will still be out in the wet air after it?
Adults 21 and over: yes. Plant limit: 3 mature + 3 immature per adult; 6 mature + 6 immature per residence.
Secure location, not accessible to under 21s; not plainly visible from public view. Source: NY OCM home cultivation FAQ. Local rules (landlords, HOAs, city codes) can add more; this is a summary, not legal advice.
Building a Commack grow calendar around July
If you run tents back to back, decide what each is doing in July. A plant in vegetative growth usually handles a warm stretch better than one in late flower, where heat can bleach the top buds and flatten their aroma. Time a run so its last weeks fall in June or after mid August, and July's heat lands on leaves instead of ripening flowers. Lights on overnight help either way: July nights average about 66°F against afternoons near 83.
Moisture is the longer fight. Outdoor air held 78 percent through July and August, 75 in September and 68 in October. A garage tent, or a basement with a window cracked, breathes something close to those numbers; a closed, air-conditioned room does not. A dehumidifier sized for the flower room, running from July through September, often matters more for bud quality here than extra cooling.
Winter is real on this part of the north shore. The station counts about 88 freezing nights a year, and January averages a low near 25°F with about 24 freezing nights. A basement tent loses heat to the slab with the lamp off, so lift pots off the floor and run the lights through the coldest hours. January's 72 percent reading only matters if that basement is unheated and damp; heated rooms run dry in winter.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 38 | 40 | 47 | 60 | 70 | 78 | 83 | 81 | 74 | 63 | 52 | 43 |
| Avg low °F | 25 | 25 | 31 | 41 | 51 | 60 | 66 | 65 | 59 | 49 | 39 | 31 |
| Humidity % | 72 | 71 | 78 | 78 | 75 | 68 |
Highs and lows: NOAA 1991 to 2020 normals, Centerport station (5 miles away). Humidity: Open-Meteo historical model data, average daily humidity in 2024, for the months shown. Planning averages, not a forecast.
Outdoors in Commack
New York lets each adult grow 3 mature and 3 immature plants, up to 6 mature and 6 immature per residence, in a secure location that people under 21 cannot get into and that is not plainly visible from public view. A fenced yard or a greenhouse would have to meet both conditions. If yours does, start seeds indoors from March 17 to March 31 and plant out from April 28, when nights begin to average 45°F. The last frost typically falls by April 9, and April 23 is the safer date.
That leaves about 185 days before an early first frost on October 30; the typical one waits until about November 10. Timing the finish is a trade. A plant done in late September ripens in air that averaged 75 percent; one held into October gets drier air, about 68 percent, but nights near 49°F and the frost to beat. Choose mold-resistant varieties, open up the canopy and check dense colas after still, damp mornings.
| Last spring frost | Apr 9 in a typical year, Apr 23 to be safe (later only 1 year in 10) |
|---|---|
| First fall frost | Nov 10 typical, as early as Oct 30 (1 year in 10) |
| Frost-free season | about 215 days |
| Nights stay 50°F or warmer | May 14 to Oct 12 |
| Start seeds or clones indoors | Mar 17 to Mar 31 |
| Move plants outdoors | Apr 28 or later |
Commack grow notes that stay at home
Commack straddles the Huntington and Smithtown line, so the people next door may live in a different town than you do. Either can hear a fan through a garage wall or spot a lamp glowing at 2 a.m. Encryption hides neither; ducting, a carbon filter and blackout curtains do. What it protects is the record.
Canna GLAP encrypts your grow records on the phone before they upload. A thief inside our servers would find scrambled grow data and nothing to unlock it. The fixes that carried a crop through July and September stay with the grower who worked them out.
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 Commack ask
When can I plant cannabis outside in Commack?
From April 28, after starting seeds indoors March 17 to March 31. By then nights average 45°F; the last frost typically comes by April 9, with April 23 as the safer mark.
How hot does Commack get for a grow tent?
July is the month to watch: the Centerport station averages about 6 days of 90°F heat then, and highs near 83°F. June and August average about 2 hot days each.
Is mold a problem for cannabis plants in Commack?
It is the main late-season risk. Humidity averaged 75 percent in September 2024 and 68 in October, so give plants airflow, prune for an open canopy and run a dehumidifier in indoor flower rooms.
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