I've already hit two out of three. Yesterday on April 3rd(!) my glasses fogged up at 7:30 in the morning. And tonight the mosquito spray truck went by twice.
I normally wouldn't experience either of these events until at least late April. And the sidewalk usually doesn't get too overheated for bare feet until mid-May. I have a feeling I'll be lunging for the coolness of the grass to escape the scorching cement soon. I think it's going to be a very hot and mosquito-laden summer.