Does it rain or snow more often on Friday or Saturday or Sunday than on the other days of the week? It seems like that. I’m wondering if there is a seven-day cycle that makes weekend weather worse.
A seven-day cycle of precipitation does not exist in Chicago’s climate. Nor does precipitation occur more frequently on any given day of the week. A scan of Chicago’s precipitation records shows that measurable precipitation (0.01 inch or more) falls on either 33 or 34 percent of all days of the week: Sun 33%, Mon 33%, Tue 34%, Wed 33%, Thu 33%, Fri 34%, Sat 33%.
A bad experience with weekend weather can dominate our remembrance of past events. A weekend picnic washout, for example, will be remembered more than a similar event that comes off without a hitch.