Growing up in Saskatchewan, where the temperature range is -40C to +40C, we only had single-pane windows, so every fall we had to put the storm windows on and take them off again in spring.
In light of the "around the world in less than 35 knots" comments, I have to say that Juan de Fuca Strait to San Francisco was an enlightening first foray into open ocean sailing, only a hundred miles off the coast. Despite good weather routing, we ended up off the Oregon coast in mid-fifties...