月間 (gekkan) Japanese meaning: month-long period | KotomoraWe achieved this month's monthly target.
The monthly precipitation exceeded the average.
Usage patterns
月間〈物〉monthly ~ (attaches to a noun to mean a monthly total, schedule, or goal)
We tallied up the monthly sales.
〈事〉月間Month of ~ (a themed month-long campaign or observance)
October is Reading Month.