September Weather in Kapa'a

Last updated: March 2, 2024

The weather in Kapa'a, United States, during September is characterized by an average temperature of 25°C (78°F). Highs can soar to 27°C (82°F), while lows may dip to 23°C (74°F). Typically, the humidity level in Kapa'a throughout September hovers around 82%.

23°C (74°F)

Minimum temperature

25°C (78°F)

Average temperature

27°C (82°F)

Maximum temperature

82%

Humidity

Precipitation and Sunshine hours

In September, Kapa'a averages 65 mm (2.5 inches) of rainfall, typically over the course of 21 rainy days. The month enjoys an average of 12 hours 13 minutes of daylight, with the sun shining for approximately 10 hours 29 minutes each day. Additionally, there is a 54% probability of sunny days during this period.

65 mm (2.5 inches)

Precipitation

21 rainy days

Rainy days

10 hours 29 minutes

Sunshine hours

54%

Chance of sun

UV Index

In September, the UV Index in Kapa'a reaches a maximum of 12, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 10 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 1 2 4 7 10 12 12 10 7 4 2 1 0
Exposure Low Moderate High VeryHigh Extreme VeryHigh High Moderate Low
Time to burn 45 min 30 min 25 min 15 min 10 min 15 min 25 min 30 min 45 min

Compare Kapa'a's Climate with Cities Worldwide