Here in Boston the weather has been perfect for the kilt. Daytime highs near 40 f. Nights are about 0 to +5. Jeans are one 10 oz layer of about two yards of cotton denim. Kilt is 8 yards of wool, wool kilt hose, nice and toasty, when worn with a long sleeve T-shirt as a top. When the wind kicks above 20 MPH, I throw on a cardigan hoodie. But then my metabolism is kinda high, the spouse refers to me as the high temperature hot water bottle. Spouse wants the thermostat at 60 degrees, and I tend to leave it at 50 degrees. Oh well, I just get used to being hot.
I found a Winter in North Dakota to be cool. I had three nights that I couldn't wear me kilt, as it was thermal clothing city to go anywhere on those nights that it got reeeeaal cold.
--- Steve