The release schedule of the JJK manga isn't fixed. Sometimes it comes out monthly, but it can also be affected by various factors. Keep an eye on the publisher's announcements.
The release date of the new JJK manga might vary. You'd better keep an eye on the official announcements from the publisher or the manga's official website for the exact date.
The JJK manga doesn't have a fixed release pattern. Sometimes you might get a new chapter monthly, but there can be breaks or changes depending on production factors and the creative process.
I'm not sure exactly when the next chapter of the JJK manga will be released. You might want to keep an eye on the official manga website or social media channels for the latest updates.