In May, Trieste typically sees daytime highs of 19.4°C and overnight lows around 9.6°C. Compared to the annual average high of 15.7°C, May runs +3.7°C.
May in Trieste averages a daytime high of 19.4°C and an overnight low of 9.6°C.
May runs +3.7°C compared to Trieste's annual average high of 15.7°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 19.4°C and cooler evenings around 9.6°C.