CannaGLAP

Grow cannabis in Woodland, CA

Growing cannabis in Woodland: July heat in air that averaged 37 percent humidity

Woodland's summer is hot and short on moisture at the same time. July averages a 95°F afternoon with about 25 days reaching 90°F, and in 2024 its humidity averaged 37 percent, the lowest of the months measured.

Dry heat pulls water through a plant faster than its roots can always replace it. So when a Woodland plant curls its leaves at 4 in the afternoon, is it hungry, or just thirsty?

California home grow rules (as of October 2026)

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 Woodland grow room in dry valley heat

The Woodland station, 1.2 miles away at 67 feet, counts about 95 afternoons a year of 90-degree heat, nearly all from May through September. A tent in a garage near Rotary Park soaks that up, so run the lamp from evening to morning from June into September. July nights average about 58°F, some 37 degrees under the afternoon high, and an inline fan pulling it through does much of the cooling.

Then put water back in the air. Seedlings and fresh clones want far damper air than 37 to 38 percent, so a dome or a small humidifier carries them through June and July. Pots can dry by midafternoon: lift them to judge the weight, water deeper and less often, and ease off the feed if leaf tips brown.

The payoff comes in flower. September and October averaged 43 percent humidity in 2024, well under the damp levels where bud rot takes hold, so a Woodland flower room needs strong exhaust and cooling more than a big dehumidifier.

December and January bring the opposite trouble. Lows average about 38°F, the station logs about 9 freezing nights a year, most of them in those two months, and January air outside averaged 85 percent. A heated room dries that moisture out. An unheated garage keeps both the chill and the damp, so a winter tent there wants a heater on a thermostat, seedling mats, lights through the coldest hours and a dehumidifier.

Heater safety: use one with tip-over and overheat shutoff, plug it straight into a wall outlet (not an extension cord or power strip), and keep it a few feet from tent fabric and plants.

MonthJanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F566268748290959490806556
Avg low °F384144475257585756504338
Humidity %853837444442

Highs and lows: NOAA 1991 to 2020 normals, Woodland 1 Wnw station (1.2 miles away). Humidity: Open-Meteo historical model data, average daily humidity in 2024, for the months shown. Planning averages, not a forecast.

Outdoors in Yolo County

The state limit is 6 living plants per private residence, however many adults share it, grown in a locked space that is not visible from a public place. Cities and counties can set reasonable rules for indoor grows, without banning them, and may ban outdoor grows. Check Woodland's rules before planting.

Where local rules allow outdoor plants, begin seeds inside from March 4 to 18, then transplant from April 15. A frost after March 11 comes about one spring in ten, and nights average 45°F from March 27. That gives about 218 days to the early first frost of November 19, room for a photoperiod plant to finish without a race. The hard stretch is July and August, about 25 hot days each: afternoon shade cloth, deep mulch and early watering help keep plants from scorching, and the dry fall air helps buds ripen clean.

Last spring frostFeb 7 in a typical year, Mar 11 to be safe (later only 1 year in 10)
First fall frostDec 5 typical, as early as Nov 19 (1 year in 10)
Frost-free seasonabout 301 days
Nights stay 50°F or warmerMay 3 to Oct 17
Start seeds or clones indoorsMar 4 to Mar 18
Move plants outdoorsApr 15 or later

Your Woodland grow records, kept close

Woodland gathers for the Yolo County Fair, the First Friday Art Walk and the Dynamite Chili Cook-off, and a fellow grower may be standing next to you in line. Encryption cannot stop a neighbor from smelling a plant on a still September evening; it guards the record of how you grew it.

Canna GLAP encrypts the journal of your grow before it ever leaves the phone. Anyone breaching our servers would get grow records they could not decode, and no key to try. The watering rhythm that got your plants through a 95°F July stays your own.

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 Woodland ask

How hot does Woodland get for growing cannabis?

July averages a 95°F high with about 25 days of 90°F or more. July nights cool to about 58°F, so overnight lights and night air keep a tent manageable.

Is Woodland's air too dry for cannabis?

For seedlings and clones in summer, it can be: humidity averaged 37 to 38 percent in June and July 2024. For flowering it helps, since September and October averaged 43 percent.

When should I plant cannabis outside in Woodland?

From April 15, after starting seeds indoors March 4 to 18, if the local rules for your address allow outdoor plants. Plants must be locked away and hidden from public view, 6 living plants per residence at most.

Growing near Woodland

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