Well, the growing season is almost over. The only thing a gardener has to look forward to at this time of the year is the maintenance work of weeding and harvesting and the inevitable death of their garden.
There isn't any fun planning or planting. Even January is less depressing, because there is Spring to look forward to and the frantic picking of seeds/plants and indoor starting of seedlings.
July is also a big let down, because when you see some of your January garden daydreams in the unforgiving July sunshine, they don't look as wonderful and amazing as you imagined.
Don't even get me started on the mosquitoes!
Maybe you have a longer growing season, but for me, living in Minnesota, July is a depressing month.