SA- Jus' like us people folk, comfort within our control~RULES! Their means to our digital/push-button AC world = SHADE(eg' bridges, brushpiles, fallen timber, boat docks/piers, separately staged/moored boats off shore. Although it seems us peeps need 5 degree variables to notice, no doubt in my mind that these/our quarry value it by DEGREES @a time. The better the "hold value" of this shade of choice, the longer their non-migration from it will be(eg.- bridges vs shallow brush/fallen tree= stay vs. transition). Cloudy vs. Bright vs. Night time....all viable factors to consider.

u2s