3 ( June, July, and August)
Exclusively, five months
7 months
January follows September by 4 months. There are three intervening months: October, November and December.
3 (excluding May and September) - the summer months of June, July and August.
4 months (June, July, August, September)
Including the start and end month in the calculation, there are seven months between the two months.
There are 5 months between June and December. July, August, September, October and November.
Between the months of August and February fall the months of September, October, November, December, and January, which adds up to five months.
6 months fall between February and September: March, April, May, June, July and August. That time span is half of a year.
8 months
There are nine months between August and May, counting August as the starting month and May as the ending month. The months in between are September, October, November, December, January, February, March, and April. If you exclude August, there are eight months from September to April.
September and November are separated by October.The following year's September is the 10th month after a given November.