Hilo, Big Island weather in September

Check the Weather in Hilo, Big Island, Hawaii in September before you book your next holiday. This gives the best indication of the weather in September and includes figures for temperature, sunshine and rainfall.

  • 24°C maximum daytime temperature in September in Hilo, Big Island24
    24°C max day temperature
  • 5 hours of sunshine per day (43% of daylight hours) in September in Hilo, Big Island5
    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
  • 117 mm monthly rainfall in September in Hilo, Big Island117
    117 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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Metric (°C / mm)  |  Imperial (°F / inches)

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