I often leave part-exposed film in a camera from a few weeks up to a month-or-two, if I'm not doing any shooting. No worries at all. The only time I'd deliberately use up a film quickly would be anything specialist, like a very fast film or an IR film.

Obviously, I keep the camera in normal domestic conditions, not anywhere like a hot car.

(Not directly relevent, but have just used an old Orwocolor (expiry 1992!) film found in the depths of my freezer....24 (technically) perfect prints, indistinguishable from those from a fresh film exposed at the same time!)