Koloa Weather in September

September in Koloa sees daytime temperatures around 28°C (82°F) and lows of 24°C (75°F) at night. The excellent weather makes it a good time to visit.

Rainfall in Koloa in September

Typically, you can expect about 16 days of rain this month, with 46 mm (1.8 in) on average. Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.

Temperature in Koloa in September

If you're visiting Koloa in September, expect excellent temperatures with highs of 28°C (82°F) and overnight lows of 24°C (75°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With lows around 24°C (75°F), the nights are warm enough that a sheet is usually all you need for bedding. This is typically the warmest month of the year, so light summer clothing is a good idea.

Sunshine in Koloa in September

With approximately 242 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

Wind Speed in Koloa in September

September sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

Average water temperature in September

At 27°C (81°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.

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