Is Diamond Head / Kapahulu / Saint Louis Heights hot in September?
Days are typically hot at 31.1°C, while nights average 23.1°C.
United States · 1991–2020 normal
Diamond Head / Kapahulu / Saint Louis Heights in
September.
Typical September weather in Diamond Head / Kapahulu / Saint Louis Heights: 31.1°C by day, 23.1°C at night, 26 mm of rain over 5.2 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high31.1°C
Typical low23.1°C
Rain26 mm
Wet days5.2
In the year-round weather comparison, September scores 60 out of 100 (February leads the year at 79). Daylight is calculated as 12 h 14 from latitude 21.28°. Open-water sea temperature is 26.8°C (13 km from the place centre).
September at a glance
What is Diamond Head / Kapahulu / Saint Louis Heights like in September?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 26 mm across about 5 wet days.
How much daylight is there?
There are about 12 h 14 between sunrise and sunset at mid-month, calculated from the place latitude.
Is September a good time to visit?
September ranks 12 of 12 in our weather comparison; February ranks first.
Event window
Warm sea in September
The nearest open-water NOAA OISST 1991–2020 cell averages 26.8°C in September. A sheltered bay can run warmer than that open-water cell.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 5848322
- NOAA station
- USC00519397 · WAIKIKI 717.2
- Station distance
- 0.8 km from the place centre
- Coverage
- Strong coverage · 28 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Diamond Head / Kapahulu / Saint Louis Heights is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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