Yes. Weed smoking is legal in Illinois under the Illinois Cannabis Regulation and Taxation Act.
Illinois cannabis laws prohibit smoking weed in public locations. Smoking weed in any location where smoking is prohibited under the Smoke-free Illinois Act is not allowed. Under the Smoke-free Illinois Act, smoking is prohibited in public, workplace environments, and areas within 15 feet of exits, entrances, window openings, and ventilation intakes. These include but are not limited to:
It is illegal to smoke weed in any vehicle, including motorcycles and boats. Whether the car is parked or moving or you are only a passenger, cannabis users are not permitted to smoke weed in a vehicle. If you are transporting weed in your vehicle, the substance must be kept in a secured, sealed container out of reach.
Only adults aged 21 or older and medical marijuana patients with valid Illinois medical marijuana cards can smoke marijuana in Illinois.
You may smoke weed behind closed doors on a private property in which the owner approves smoking. If you are unsure whether your landlord approves of cannabis smoking on your rented property, check your lease agreement or contact the property owner for permission. Note that it is illegal to smoke weed in any private residence used as a licensed childcare or other social service care location and on federal property, such as military bases, federal courthouses, and federal parks. Smoking weed in any place where you may be reasonably expected to be seen by others is not allowed.