This behavior may be a result of the climate. There’s several months where I live where the daily chance of rain falls between 20-40%, and it does rain on about

This behavior may be a result of the climate. There’s several months where I live where the daily chance of rain falls between 20-40%, and it does rain on about a fifth to a third of those days… but the other days I have to give up bag space for an umbrella, for nothing! So I usually won’t carry rain gear unless the rain is obvious and obviously heavy (dark clouds and high winds, for instance, versus simply being overcast) or there’s some special thing where I must arrive dry (date, client meeting, the like)