A sure way to tell its August! Tomatoes on the window sill.
I'm gradually getting tomatoes from my shady garden. About one every other day. I beat the squirrels by picking them as they start to turn color and letting them fully ripen inside.
I prefer to do this anyway, even without squirrel competition. Doesn't seem right to have ripe tomatoes hanging on the vines. It risks them getting overripe without me noticing and lets the vine put energy into the rest of the fruits.
When I went up to my parent's last week, my Mom gave me her extras. Her garden is producing tons. I ended up with a nice batch of tomato sauce. I was going to freeze it, but we ate it all that night.