In May, Missoula typically sees daytime highs of 16.0°C and overnight lows around 1.9°C. Compared to the annual average high of 11.0°C, May runs +4.9°C.
May in Missoula averages a daytime high of 16.0°C and an overnight low of 1.9°C.
May runs +4.9°C compared to Missoula's annual average high of 11.0°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 16.0°C and cooler evenings around 1.9°C.