FWIW, I think you need to pair down your sandal, linen, Summer dress, sunglasses and sleeveless cotton/silk top collection.
It takes a LONG time to warm up around here. July, really. And the mornings are always cool. But the Summer days are long - light till 10pm - so things are warmer in the afternoon than they are in the morning in Summer.
Items that get a lot of use:
- toppers in all weights, styles and fabrications
- boots
- closed shoes
- jeans
- knitwear
- socks
- camisoles
I'm not sure whether it's a good idea to store old Summer stuff. By the time you want to wear it again, the internal and external factors that influence your style may well have changed.