CannaGLAP
Grow cannabis in Newport News, VA
Growing cannabis in Newport News: summer nights that never cool the tent
Newport News growers barely think about frost. The Norfolk station, about 8 miles away, counts about 33 freezing nights a year, and fall's first frost usually waits until November 26. The trouble starts after dark in summer. July nights average about 73°F, and humidity sits near 77 percent from July into September.
A grower somewhere drier can cool a tent by running the lights at night. Here the night air is warm and wet too. So what, exactly, is pulling the heat and the water out of your grow room?
Adults 21 and over: yes. Plant limit: 4 per household.
Main place of residence; not visible from a public way; each plant tagged with your name and ID number. Source: Va. Code 4.1-1101. Local rules (landlords, HOAs, city codes) can add more; this is a summary, not legal advice.
Running a Newport News grow room through a Tidewater summer
Treat air conditioning as part of the grow, not an extra. July highs average about 89°F with about 16 days reaching 90°F, and August adds about 10. Night lights still help, but with lows near 73°F the intake is drawing in warm air at every hour. A room air conditioner keeps the space in range, and it wrings water out of the air as it cools, which matters here as much as the temperature does.
Humidity is the real opponent. It averages 77 percent in July, 76 in August and 77 again in September, and a flower room in a Denbigh garage or a Hilton Village spare room will match that unless something is working against it. Run a dehumidifier with capacity to spare from June through harvest, set it to drain by itself, and keep a fan pushing air both below the canopy and across its top.
Winter is the easy season. January lows average about 34°F, January brings only about 13 freezing nights and February fewer, and by mid March frost is usually done. A warming mat beneath seedlings and cuttings is often all the heating a winter tent asks for, which makes the colder months a comfortable stretch to run a flower cycle indoors.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 50 | 53 | 59 | 70 | 77 | 84 | 89 | 86 | 81 | 72 | 61 | 54 |
| Avg low °F | 34 | 35 | 41 | 50 | 60 | 68 | 73 | 72 | 67 | 56 | 45 | 38 |
| Humidity % | 71 | 66 | 77 | 76 | 77 | 67 |
Highs and lows: NOAA 1991 to 2020 normals, Norfolk Nas station (8.4 miles away). Humidity: Open-Meteo historical model data, average daily humidity in 2024, for the months shown. Planning averages, not a forecast.
Outdoors in Newport News: 207 days and a damp finish
Virginia allows 4 plants per household, grown at your main place of residence. Every plant, in a tent or in a yard, must be hidden from view from any public way and carry a tag that shows your name and your ID number. In Port Warwick, Hilton Village or anywhere else, check the view from the street before you choose a spot.
Start seeds from March 4 through 18, then wait until April 15 to plant outside. Frost is usually gone by March 16 and April 1 is the safe date, but nothing is gained by rushing a plant into a cool spring. Frost in fall typically waits until about November 26, and even an early one waits until November 8, about 207 days after planting. The calendar will not stop you. September's 77 percent humidity might, so favor mold-resistant strains, prune for airflow and aim to harvest in October as the air eases to about 67 percent.
| Last spring frost | Mar 16 in a typical year, Apr 1 to be safe (later only 1 year in 10) |
|---|---|
| First fall frost | Nov 26 typical, as early as Nov 8 (1 year in 10) |
| Frost-free season | about 255 days |
| Nights stay 50°F or warmer | Apr 14 to Oct 31 |
| Start seeds or clones indoors | Mar 4 to Mar 18 |
| Move plants outdoors | Apr 15 or later |
Tagged plants, private records
Virginia's tag puts your name on each plant. Nothing says your notes have to go with it. If you rent near Christopher Newport University or share a house in Denbigh, a roommate or landlord may know the tent is there. They have no reason to see what you logged.
Canna GLAP encrypts your grow on the phone first, so the records all upload already locked. Should our servers ever be breached, the intruder would find grow records scrambled past reading and no key to fix that. The record of a Hampton Roads summer stays with the person who grew through it.
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 Newport News ask
Can I run lights at night to cool a Newport News tent?
It helps, but less than you might hope. July nights average about 73°F, so a room air conditioner usually carries the load from June through August.
When is mold worst for Newport News growers?
July through September, when humidity averages 76 to 77 percent. October drops to about 67 percent, so a harvest timed for October finishes in drier air.
What does Virginia require for a home grow in Newport News?
Up to 4 plants per household at your main place of residence, each one kept out of view of any public way and tagged to show your name and ID number.
Growing near Newport News
- Grow cannabis in Hampton, VA 6 miles
- Grow cannabis in Norfolk, VA 12 miles
- Grow cannabis in Chesapeake, VA 16 miles
- Grow cannabis in Virginia Beach, VA 26 miles
- Grow cannabis in Richmond, VA 68 miles
All Virginia cities · Every state where adults may grow at home