Unpredictable weather

What on earth is going on with the weather in my part of the world? Last week it was starting to get chilly at night, and I got my jeans out and considered packing up my shorts for the year. Then this week its been either pouring with rain, or so warm and humid that we have the A/C at full blast. I don't know whether to wear shorts, or raincoats or sweaters. September is meant to be dry, sunny and warm, somebody has obviously forgotten that this year!

PS. Like the pic? Something to do with Hurricane Irene apparently. Nice shorts...