September weather forecast and climate
Lihue, HI US

• Average high temperature in September: 84.8°F

The warmest month (with the highest average high temperature) is September (84.8°F).
The month with the lowest average high temperature is February (77.8°F).

• Average low temperature in September: 74.1°F

The month with the highest average low temperature is August (74.6°F).
Coldest months (with the lowest average low temperature) are January and February (65.5°F).

• Average humidity in September: 74.1%

The month with the highest relative humidity is November (76.8%).
The month with the lowest relative humidity is June (73.5%).

• Average rainfall in September: 4.8"

The wettest month (with the highest rainfall) is November (8.7").
The driest month (with the lowest rainfall) is June (4.3").

• Average rainfall days in September: 16.3 days

The month with the highest number of rainy days is July (19.4 days).
The month with the lowest number of rainy days is February (12.1 days).

• Average sea temperature in September: 81°F

Best months for swimming (with the highest average sea temperature) are August, September and October (81°F).
Coldest months (with the lowest average sea temperature) are January, February, March and April (75°F).

• Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.5h).
The month with shortest days is December (Average daylight: 10.8h).

• Average sunshine in September: 8.1h

The month with most sunshine is August (Average sunshine: 8.5h).
The month with least sunshine is December (Average sunshine: 5.2h).

• Average UV index in September: 11

Months with the highest UV index are July and August (UV index 12).
The month with the lowest UV index is December (UV index 6).