Is Weed Legal in Arizona?

Yes, marijuana, or weed, is legal in Arizona for adults 21 and older. That has been the case since Arizona voters passed Proposition 207, also known as the Smart and Safe Arizona Act, in November 2020. Both recreational and medical marijuana are legal under state law.

But “legal” does not mean “anything goes.” Arizona’s marijuana laws come with real limits, and crossing those limits can still land you with criminal charges, even here in Tempe. Here is what you actually need to know.

If you or a loved one is facing marijuana charges in Tempe or the surrounding area, the Law Offices of T. M. Allen are here to help. Contact us today to get a free case review with Tempe drug lawyer Tyler M. Allen.

How Marijuana Became Legal in Arizona

Arizona first legalized medical marijuana in 2010 through Proposition 203. That law allowed patients with qualifying medical conditions to access cannabis with a doctor’s recommendation and a state-issued medical marijuana card.

Ten years later, voters went further. Proposition 207 passed with about 60% of the vote and legalized recreational marijuana for all adults 21 and older. Sales began in January 2021. The law is codified primarily in A.R.S. Title 36, Chapter 28.2.

Both programs remain active today. Some people keep their medical marijuana cards even after recreational legalization because medical patients are allowed to possess larger amounts and pay lower taxes at the dispensary.

What Adults Can Legally Do Under Arizona Law

If you are 21 or older, Arizona law allows you to:

• Possess up to 1 ounce of marijuana (up to 5 grams of which can be concentrate)
• Grow up to 6 plants at your primary residence (up to 12 plants if two or more adults live there)
• Purchase marijuana from a licensed dispensary
• Gift up to 1 ounce to another adult (with no payment or exchange involved)
• Use marijuana on private property where the owner permits it

Medical marijuana patients with a valid registry ID card can possess up to 2.5 ounces and, in some cases, cultivate more plants than the recreational limit allows.

Where You Cannot Use Marijuana

This is where a lot of people get into trouble, especially in a place like Tempe, where there is a large college population and a busy public social scene around Mill Avenue and the ASU campus. Legalization does not mean you can use marijuana anywhere you want.

Public consumption is still illegal. That means parks, sidewalks, parking lots, bars, restaurants, concerts, sporting events, and anywhere else that is open to the public. Public use is a petty offense under state law, but it can still result in a citation.

You also cannot use marijuana in a car, whether you are driving or a passenger. And you cannot consume it on federal property, which includes federal buildings, national parks, and any land managed by the federal government, regardless of what Arizona state law says.

Private property owners, including landlords and hotels, can prohibit marijuana use on their premises. If your lease says no marijuana, using it there can put your housing at risk. Always check before you assume.

Home Growing Rules

You can grow marijuana at home under Arizona law, but the rules are specific. Plants must be kept in a locked, enclosed space that is out of public view and inaccessible to anyone under 21. You cannot grow in an open yard or on a balcony that is visible to neighbors or the street.

The household limit is 6 plants for a single adult and up to 12 plants if two or more adults over 21 live at the same address. Selling anything you grow is illegal; you can gift marijuana, but the moment money or goods change hands, it becomes an unlicensed sale, which is a serious criminal offense.

As with use, your landlord can prohibit cultivation. If you are renting, that is worth checking before you set anything up.

What Happens If You Exceed the Legal Limits?

The legal amount of marijuana is not a suggestion; it is a hard limit. Here is what the penalties look like if you go over it:

• Possession of more than 1 ounce but less than 2.5 ounces: Petty offense, fine up to $300
• Possession of 2.5 ounces to 2 pounds: Class 6 felony, up to 1.5 years in prison, and up to $150,000 in fines
• Possession of more than 2 pounds: Class 4 felony, potentially years in state prison
• Selling marijuana without a license: Felony, with penalties escalating based on the amount involved

The jump from a petty offense to a serious felony happens faster than most people expect. Carrying just a little over an ounce is a minor violation. Carrying anything over 2.5 ounces triggers felony territory under A.R.S. §13-3405.

Can You Get a DUI for Marijuana in Arizona?

Yes,  and this is one of the most misunderstood parts of Arizona’s marijuana law.

Proposition 207 did not change Arizona’s DUI laws. It is still illegal to drive while impaired by marijuana, and law enforcement can arrest you if they believe your physical or mental faculties are impaired to any degree while behind the wheel.

One important distinction: the Arizona Court of Appeals has ruled that the mere presence of THC in your bloodstream is not enough, on its own, to convict you of a marijuana DUI. Prosecutors must show actual impairment at the time of driving. Unlike alcohol, there is no set legal THC limit; it comes down to whether the officer and the evidence show that you were impaired.

That said, being arrested for a marijuana DUI in Tempe is a serious matter. A first-time conviction can carry mandatory jail time, fines, a license suspension, and an ignition interlock device requirement, the same consequences as an alcohol DUI. And THC can remain in your system long after the effects have worn off, which complicates these cases significantly.

If you have used marijuana at any point and you get pulled over, do not assume you are in the clear just because you do not feel impaired. These charges are worth taking seriously.

What About Federal Law?

This is a point that trips people up constantly. Arizona may have legalized marijuana under state law, but marijuana remains a Schedule I controlled substance under federal law. Those two things coexist, and the conflict between them has real consequences.

What that means practically:

• Possession on federal property, including national parks, federal courthouses, post offices, and VA facilities, is still a federal offense, even in Arizona
• Transporting marijuana across state lines is a federal crime, even if both states have legalized it
• Airport security falls under federal jurisdiction, so carrying marijuana through Sky Harbor, even within Arizona, can create problems
• Federal employment and federally subsidized housing may have strict zero-tolerance policies regardless of state law
• Purchasing a firearm while being a marijuana user is federally prohibited, since federal forms ask about controlled substance use

The federal status of marijuana has been a topic of ongoing political debate. Whether or not federal law changes in the future, Arizona’s state-level legalization is firmly established. But until the federal side shifts, these complications remain real.

Employers Can Still Say No

Legalization does not override workplace drug policies. Arizona employers are allowed to maintain drug-free workplace policies and can discipline or terminate employees who test positive for marijuana, even if they used it legally on their own time. This is especially common in safety-sensitive industries, federal contractors, and any workplace governed by federal regulations.

There has been some legal movement in other states around workplace protections for off-duty marijuana use, but Arizona’s law does not currently require employers to accommodate marijuana use the way some states do. Know your employer’s policy before assuming your job is protected.

Can Old Marijuana Convictions Be Expunged?

Yes, Proposition 207 included an expungement provision. If you were previously convicted of a marijuana offense that is now legal under state law, such as possession of 2.5 ounces or less, cultivation of up to 6 plants, or possession of paraphernalia, you can petition the court to have that conviction sealed from your record.

Expungement is not automatic. You have to file a petition with the court, and it is limited to offenses involving conduct that occurred before November 30, 2020. Not all marijuana convictions are eligible; for example, convictions involving large-scale transportation or sale are generally not covered.

If you have an old marijuana conviction on your record and you are not sure whether you qualify, it is worth sitting down with a defense attorney to find out. A sealed conviction can make a meaningful difference in employment, housing, and professional licensing.

Out-of-State Visitors: What to Know in Tempe

If you are visiting Tempe from another state, you have the same recreational purchase rights as Arizona residents, as long as you are 21 or older and have a valid government-issued ID. You can walk into a licensed dispensary and legally buy up to 1 ounce.

What you cannot do is take it home. Carrying marijuana across state lines, even into another state where it is legal,  is a federal offense. This applies whether you drive through a border crossing or fly out of Phoenix Sky Harbor. Do not pack it in your luggage.

Still Getting Arrested in Tempe for Marijuana: Here’s Why

Marijuana is legal in Arizona, but people are still getting arrested for marijuana-related offenses in Tempe regularly. The most common reasons include:

• Possessing more than the legal limit
• Driving while impaired by marijuana
• Selling or distributing marijuana without a license
• Consuming marijuana in public spaces
• Having marijuana on federal property
• Giving marijuana to anyone under 21

Tempe has a large student population and a nightlife corridor along Mill Avenue that sees active police presence. The Tempe Police Department does enforce marijuana laws, and a charge, even for something that seems minor, can have lasting consequences on your record.

Facing a Marijuana Charge in Tempe? Call Tyler Allen.

Marijuana may be legal in Arizona, but the rules around it are more complicated than most people realize. If you have been charged with a marijuana-related offense, whether it is a possession charge, a marijuana DUI, or something more serious, Tyler Allen at the Law Offices of T. M. Allen can help.

Tyler defends clients in Tempe, Maricopa County, and throughout the East Valley. He will review the facts of your case, explain your options clearly, and work to get you the best possible outcome. Reach out to the Law Offices of T. M. Allen today for a consultation.