Hawaii weather in September 2024

Expect 30°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Hawaii in September. Check more long-term weather averages for Hawaii in September before you book your next holiday to Hawaii in 2024/2025.

  • 30°C maximum daytime temperature in September in Hawaii (Honolulu, Oahu)30
    30°C max day temperature
  • 9 hours of sunshine per day
  • 8 days with some rainfall in September in Hawaii (Honolulu, Oahu)8
    8 days with some rainfall
  • 22°C minimum night-time temperature in September in Hawaii (Honolulu, Oahu)22
    22°C min night temperature
  • 12 hours of daylight per day in September in Hawaii (Honolulu, Oahu)12
    12 hours of daylight per day
  • High heat & humidity in September in Hawaii (Honolulu, Oahu)H
    High heat & humidity
  • 18 mm monthly rainfall in September in Hawaii (Honolulu, Oahu)18
    18 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in September in Hawaii (Honolulu, Oahu)11
    11 (Extreme) UV index
  • 27°C sea temperature in September in Hawaii (Honolulu, Oahu)27
    27°C sea temperature

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