this month's issue; current issue
Refers to the issue of a periodical (magazine, journal, etc.) published in the current month.
The feature in this month's issue is very interesting.
This month's issue hasn't arrived yet.
This month's issue features an article about health foods.
I bought this month's issue at the convenience store.
His article appeared in this month's issue.
今月号 refers to the current month's issue, while 来月号 refers to next month's issue.
Compound of 今月 (this month) and 号 (issue/number).