The weather as modelled by the Sine function

My life being as it currently is (i.e. like I'm on a permanent (uneventful) holiday), I can only find 2 things to post about at the moment - Films and the weather (well technically there's a lot more that can be discussed but I'll focus on the weather just now).

What I've found strange is that for at least 2 weeks, the weather (at least here in Ayrshire) has been steadily alternating each day between overcast/rainy and sunny with barely any clouds. Now living in Scotland, this uncertainty in the climate is to be expected, but to be alternating steadily as it is, surely must be quite unusual. An effect of global warming? I don't know. However, in a way it's the perfect climate, as we get the best of both worlds - a wee bit of variety. The only snag is that temperatures are becoming more autumnal and there seems to be a lot of wind blowing.

Anyway I wonder how long this trend will last.