Illinois cannabis sellers sold $140 million worth of weed in July, the highest monthly total so far in 2023.

The majority of the cannabis sales were to state residents, totaling $104.3 million. Out-of-state customers bought $35.6 million worth of product, according to sales figures from the Illinois Department of Financial and Professional Regulation.

Marijuana Moments, a website that follows the weed industry, said Wisconsin likely accounted for a big portion of the out-of-state customers. Minnesota’s recent legalization left Wisconsin as an “island of prohibition” in the region, the website said.

July’s total was the second-all-time highest monthly sales in Illinois. State retailers sold $143.9 million in December 2022. Sales totaled $1.5 billion for all of 2022.

A total of 3.5 million cannabis products were sold in July — the most items sold in a month since the state started its legal recreational cannabis program in 2020. December 2022 had 3.4 million items sold, according to state data.

Sales this year total $924.4 million. A recent report showed pot prices in Illinois are among the highest in the country, making the state the third-largest cannabis market after California and Michigan.

Information from Headset, a company that tracks point-of-sale figures from cannabis dispensaries, shows the average price per item in Illinois is 89% higher than in the rest of the U.S.