Not too easy. Not too difficult.
For instance the Social Science and Math Building has a courtyard designed to mimic the components of the surrounding ecosystem. The climate is mild. It doesn't get too hot, it doesn't get too cold.
Although, it was actually legitimately cold for a week and a half this winter (-10 C!) so there is variation, although rare. It does rain here but not too much (nowhere near as much as it does in Vancouver or Seattle). Summers are pretty dry.
Hours per week:
Advice for students:
Usually the temperature varies between 5 C to 25 C throughout the year. You can ride your bicycle all year round and most people do. I only wore a "spring coat" for all of last winter.