Agree, that on any morning - indeed, every morning - a coffee is nice, nay, necessary. Welcome, needed. Sippled, sampled, savoured...As nice as a coffee on a cold, rainy morning. Any morning, in fact.
However, yes, the sunshine does add an uplift to one's mood.
Thoroughly enjoyed.
Nevertheless, there is something quite exquisite - and supremely enjoyable - about sipping a really good coffee on a summer's morning.