D
there is no middle ground
It gets up to 115 degrees between spring and fall, so get used to that, and it is so, so far away from the nearest beach. then between fall and spring it drops down to a frosty 33 degrees, so no snow, but you will be cold. Lovely, right? Riverside is right beneath some small mountains, so all of the city smog gets trapped right here on campus, and if there is a fire anywhere nearby expect ashes to rain down- it will happen. No humidity, just dry air.