I wear whatever the weather dictates.
I have four skirts which are worn winter and summer. 2 black, 1 navy and 1 mid-blue
With them, according to the temperature, I wear a polo-neck with a jumper on top for the coldest and a petticoat underneath.
As it gets warmer, a medium weight t-shirt, blouse and waistcoat (I have 3 colourful weskits). or jersey if it's changeable and the old petticoat again.
Layering is essential because we often have cold mornings and as the day heats up, I can shed things 
In Spring it's a t-shirt and cardi or waistcoat and off comes the petticoat
.
In the warmest weather a very light t-shirt or, indoors, a lavalava.
I have 2 dresses which come in handy for 'best'.
The only uniform I wear is when I'm 'on duty' as a kaumatua and required to attend funerals or other official occasions.
Then it's my black skirt, cream blouse or cream polo neck depending on season and a black tunic top with the regulation multi-greens scarf, black stocking (knee-hi).
That's it.
Fortunately my weight and size has stayed the same for decades, so some of my clothing dates from then and still fits.