September weather forecast and climate
Lihue, HI

The first month of the autumn, Septiembre, is also a moderately hot month in Lihue, Hawaii, with average temperature fluctuating between 74.1°F (23.4°C) and 84.7°F (29.3°C).

Temperature

The warmest months are Agosto and Septiembre, with an average high-temperature of 84.7°F (29.3°C).

Heat index

The average heat index is appraised at a hot 93.7°F (34.3°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, wind, pregnancy). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In Lihue, the average relative humidity in Septiembre is 74.1%.

Rainfall

In Lihue, Hawaii, during Septiembre, the rain falls for 16.3 days and regularly aggregates up to 4.84" (123mm) of precipitation. Throughout the year, in Lihue, Hawaii, there are 194.8 rainfall days, and 78.9" (2004mm) of precipitation is accumulated.

Ocean temperature

Agosto through Octubre, with an average ocean temperature of 80.6°F (27°C), are months with the warmest seawater.
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The average length of the day in Lihue is 12.3h.

Sunshine

In Lihue, the average sunshine in Septiembre is 8.1h.

UV index

The average daily maximum UV index in Lihue is 11. A UV Index value of 11, and more, symbolizes an extreme health hazard from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 11 in Septiembre interpret into the following advice:
Practice all-important precautions. Light skin people may get burned in less than 5 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.