I think the warm air slows it down a bit, simply because UV light burns it off of outside surfaces and people are more inclined to naturally be distant from each other due to the nicer weather.
Regardless right now I think we have a better chance of getting sick from these wild temperature swings, to go from 89 on Saturday, 61 yesterday and 59 right now is wild. Then Friday & Saturday we're right back at it making a run at 90.