I actually do know the answer here, I forgot I had my snows on; Snow tires drag more in warmer conditions, as the tires are meant to stay softer in colder temps, so they get extra soft compared to summer tires when it warms up.

quote; Icyroadsafety.com

“Since winter tires are made of softer rubber compounds, they are noticeably "squishy" during warm weather. This effect is really pronounced when temperatures rise above 50°F - it feels similar to the steering linkage being a little loose, especially at highway speeds. You can feel the car "wobble" during harder turns and cornering. The softer material means that winter tires will wear very fast in warm weather - you definitely don't want to leave them on very long once spring arrives.”