Track your time on a consistent route on paved, snow free roads. I guarantee you'll see a dip in winter. Scorching heat with high humidity has an opposite effe

Track your time on a consistent route on paved, snow free roads. I guarantee you'll see a dip in winter. Scorching heat with high humidity has an opposite effect. H2O drops the density of air and you can go measurably faster than in drier air.