Well, I live in a city where "seasons" make more sense in therms of statics than in reality. We can have mild cold fog at 9am, searing hot Sun at 12pm, thunderstorms at 6pm, cold rain until 9pm and frostbite winds at 12am. A cold summer day has low/high temperatures around 18-24C (64-75F). A hot summer day is more like 22-32C (70-90F). A cold winter day is 10-22C (54-72F) and a hot winter day is 20-30C (68-86F). Low temperatures will fall below 5C (40F) twice or thrice a year (and this can happens on winter or mid seasons) and higher temperatures will surpass 35C (95F) twice or thrice a year (this can happens on summer or mid seasons). Only thing we know for sure when it comes to weather and clothes is that no matter what you wear, it wont work.
On the bright side, I don't really have winter/spring/summer/autumn capsules. I get to use most of my clothes all year, just layering them in different ways.