It is interesting how the human body adapts to heat.
I used to go to southern Spain in early March every year. The temperature here at that time of year is typically 5-6 degrees C. In Spain we used to get 15-25 degrees most days. We UK cyclists would be wearing light summer cycling kit and sweating. We would see Spanish pro cyclists out on training rides and they would be wearing full winter kit - long tights, overshoes, jackets, long fingered gloves, and often scarves and woolly hats too! We would ride up to mountain villages and see old men sitting out chatting on roadside benches - they would be wearing heavy overcoats, gloves, scarves, hats...