Not quite: you're correct about seasonality but seasonality is an issue to begin with because people are spending more time inside, in closed air systems. (Other factors as well). But that still requires people to mix about with each other. Things like eating in fully enclosed "outdoor" tents instead of true outdoor settings, family get togethers like Thanksgiving, etc. If people weren't going out & seeing each other, the virus wouldn't just appear in closed social networks.
You're also ignoring the Summer spike that occured as precautions were relaxed, at the same time that it gradually began making its way off of the coasts and into land-locked states, especially those that were generally skeptical of taking precautions to begin with, so decreases & spikes are not solely attributable to seasonal factors.
You're also ignoring the Summer spike that occured as precautions were relaxed, at the same time that it gradually began making its way off of the coasts and into land-locked states, especially those that were generally skeptical of taking precautions to begin with, so decreases & spikes are not solely attributable to seasonal factors.