This is one of the episodes that is not set in winter. This one is set in probably mid-autumn. The men are playing football outside, and there is a massive rainstorm (rather than a snowstorm).
Updates: Except that while they are playing football, there are obvious patches of snow on the ground. It's much more likely that the episode is supposed to be set in late winter or early spring.
Updates: Except that while they are playing football, there are obvious patches of snow on the ground. It's much more likely that the episode is supposed to be set in late winter or early spring.