April-may and september-october are absolutely perfect here. Temperatures hover around 20-28°C which is ideal for all-day walking through Old Town's cobblestone maze and endless outdoor café sitting without melting into the Pavement like some tourist popsicle.

I made the HUGE mistake of July last year — Daily temps hitting high 30s to low 40s made exploring absolutely miserable. Old town's narrow medieval streets trap heat like a brick oven, and most guesthouses don't have proper air conditioning. Spending more than 20 minutes outside felt like punishment.

October especially lovely with autumn colors painting the surrounding hills and crystal-clear skies perfect for day trips. It's wine harvest season in nearby Kakheti region too, so you get bonus tastings everywhere. Plus accommodation prices drop significantly from peak summer rates — Talking 40-50% savings on the same hotels.

Much better than Grey depressing october in most European cities where you're basically hibernating indoors. Here you're still eating khinkali on terraces and taking evening strolls along the Mtkvari River without freezing your face off.