Many conspiracies are seasonal. Some revolve around a particular date like 9/11 or 11/22. Some actually hinge upon the season. Each winter, a few people think there’s something wrong with the snow, or that the increase in airplane contrails indicates some kind of secret climate modification program. Each late summer as wildfires burn in the West and hurricanes take aim at the East, some people think it’s all a deliberate part of some secret, sinister plan.
One of the reasons people start to ascribe conspiracy theories to natural events is a desire for proportion. Some people feel a significant amount of cognitive dissonance when presented with a hugely significant event (such as the destruction of a small town) that seemingly happened at random.