Hilo, Big Island weather in September 2024

Expect 24°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Hilo, Big Island in September. Check more long-term weather averages for Hilo, Big Island in September before you book your next holiday to Hawaii in 2024/2025.

  • 24°C maximum daytime temperature in September in Hilo, Big Island24
    24°C max day temperature
  • 5 hours of sunshine per day
  • 14 days with some rainfall in September in Hilo, Big Island14
    14 days with some rainfall
  • 16°C minimum night-time temperature in September in Hilo, Big Island16
    16°C min night temperature
  • 12 hours of daylight per day in September in Hilo, Big Island12
    12 hours of daylight per day
  • Moderate heat & humidity in September in Hilo, Big IslandM
    Moderate heat & humidity
  • 252 mm monthly rainfall in September in Hilo, Big Island252
    252 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Hilo, Big Island11
    11+ (Extreme) UV index
  • 27°C sea temperature in September in Hilo, Big Island27
    27°C sea temperature

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