...You are doing leg lifts to look nice in your swim suit.
...You are being eaten by a dinosaur?
Oh wait...If you are making frequent trips to the zoo (where they have a temporary dinosaur exhibit that costs $3 a person...which I didn't know about when I promised the kids we'd go in).
...There are pretty flowers on the front porch to be picked and sniffed.
...You are wearing a cute sundress.
...You are eating a hot dog and watching Major League Baseball.
...Your Mom sets up the slip 'n slide with some dish soap on it in the back yard.
...You are eating a red, white and blue firecracker Popsicle while standing by an American flag.
If you are doing any one of those things (even if it is cloudy)...it's probably Summer Time!