‘Ewa Beach Weather in September

What's the weather like in ‘Ewa Beach (Hawaii) in September 2025?

The climate in ‘Ewa Beach during September can be summarized as hot and damp.

September is in the fall / autumn in ‘Ewa Beach and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a warm 30°C (86°F), whilst at night 22°C (71°F) is normal.

‘Ewa Beach weather averages (imperial / metric)
Daytime temperature 29.9°C 85.8°F
Nightly temperature 21.9°C 71.4°F
Average temperature 25.9°C 78.6°F
Daily sunshine 9.5 hrs
Avg rainfall 113 mm 4.5 ins
Rainy days 9 days
Sea temperature 27°C 80.5°F
Humidity 68%
Windspeed 19.1kph 12 mph

On average September is the 2nd driest month of the year in ‘Ewa Beach with around 113mm 4.5 inches of rain making it a damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.5 hours of sunshine per day.

September temperatures in ‘Ewa Beach

‘Ewa Beach average temperature in September

September rainfall

‘Ewa Beach average rain in September

September hourly sunshine

‘Ewa Beach average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in ‘Ewa Beach in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

‘Ewa Beach weather stats

‘Ewa Beach weather statistics
Hottest month: August 29.8°C 85.6°F
Driest month: June 109mm 4.3ins
Sunniest month: August 10hrs
Coldest month: January 25.5°C 77.9°F
Wettest month: March 217mm 8.5ins
Map showing location of ‘Ewa Beach (21.31556, -158.00722) ‘Ewa Beach map pin © Google

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