Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September is the month that records the highest temperatures, with averages ranging from a high of 81.3°F (27.4°C) to a low of 76.1°F (24.5°C).Heat index
The heat index value during September is estimated at a tropical 86°F (30°C). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.Remember that heat index calculations are made for conditions in the shade with light wind. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', represents the fusion of temperature and moisture in the air to suggest how warm it feels. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
Humidity
January, April, May, September and November, with an average relative humidity of 75%, are the least humid months.Rainfall
In September, the rain falls for 16.9 days. Throughout September, 1.22" (31mm) of precipitation is accumulated. Throughout the year, in Kahuku, there are 215.6 rainfall days, and 16.38" (416mm) of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 16min.On the first day of the month, sunrise is at 6:15 am and sunset at 6:47 pm. On the last day of September, in Kahuku, Hawaii, sunrise is at 6:23 am and sunset at 6:19 pm HST.
Sunshine
In Kahuku, Hawaii, the average sunshine in September is 8.6h.UV index
The months with the highest UV index in Kahuku are July and September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.
Frequently asked questions
What time of the year is the hottest in Kahuku?
What are the temperatures in Kahuku in September?
What is the least humid month in Kahuku?
What is the average humidity in September in Kahuku?
How many days does it rain in September in Kahuku?
How many hours of daylight does Kahuku have in September?
When is the sunrise / sunset in September in Kahuku?
How long on average sun shines in September in Kahuku?
What is the month with the highest UV index in Kahuku?
What is the UV index reading in September in Kahuku?
Average temperature in September
Kahuku, HI
- Average high temperature in September: 81.3°F
The warmest month (with the highest average high temperature) is September (81.3°F).
The month with the lowest average high temperature is February (74.1°F).
- Average low temperature in September: 76.1°F
The month with the highest average low temperature is September (76.1°F).
The coldest month (with the lowest average low temperature) is February (69.1°F).
Average pressure in September
Kahuku, HI
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is April (30.06"Hg).
The month with the lowest atmospheric pressure is October (29.97"Hg).
Average wind speed in September
Kahuku, HI
- Average wind speed in September: 11.2mph
The windiest month (with the highest average wind speed) is July (13.4mph).
The calmest month (with the lowest average wind speed) is January (10.2mph).
Average humidity in September
Kahuku, HI
- Average humidity in September: 75%
The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are January, April, May, September and November (75%).
Average rainfall in September
Kahuku, HI
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is March (2.09").
The driest month (with the least rainfall) is July (0.75").
Average rainfall days in September
Kahuku, HI
- Average rainfall days in September: 16.9 days
The month with the highest number of rainy days is March (21 days).
The month with the least rainy days is January (15.6 days).
Average daylight in September /
Average sunshine in September
Kahuku, HI
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 48min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Kahuku, HI
- Average sunshine days in September: 7.4 days
The month with the most sunshine days is January (10.1 days).
The month with the least sunshine days is November (3.5 days).
Average UV index in September
Kahuku, HI
- Average UV index in September: 7
The months with the highest UV index are July and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, August, October, November and December (UV index 6).
Average cloud cover in September
Kahuku, HI
- Average cloud cover in September: 39
The month with the most cloud cover is March (Cloud cover 47).
The months with the least cloud cover are January and September (Cloud cover 39).
Average visibility in September
Kahuku, HI
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Kahuku, Hawaii, USA
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