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 sea temperature 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
The month of September sees the highest average temperatures, reaching 79.9°F (26.6°C) at the peak and 76.1°F (24.5°C) at the low.Humidity
In September, the average relative humidity is 75%.Rainfall
In September, in Waihee, the rain falls for 8.1 days. Throughout September, 0.39" (10mm) of precipitation is accumulated. Throughout the year, there are 103.4 rainfall days, and 6.57" (167mm) of precipitation is accumulated.Ocean temperature
September is the month with the warmest seawater, with an average ocean temperature of 80.2°F (26.8°C).Note: Swimming, diving, and similar water activities in temperatures ranging from 77°F (25°C) to 84.2°F (29°C) are seen as very agreeable and pleasurable for lengthy periods without discomfort.
Daylight
In Waihee, the average length of the day in September is 12h and 15min.On the first day of the month, sunrise is at 6:10 am and sunset at 6:41 pm. On the last day of September, in Waihee, sunrise is at 6:17 am and sunset at 6:14 pm HST.
Sunshine
The average sunshine in September in Waihee, Hawaii, is 9.6h.UV index
The months with the highest UV index are July through October, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be wary! Reflections from sand and water make UV radiation more intense.
Frequently asked questions
What is the hottest time of year in Waihee?
What is the average September temperature in Waihee?
What is the average humidity in September in Waihee?
How many days does it rain in September in Waihee?
When is the ocean warmest in Waihee?
How warm is the water in September in Waihee?
What is the average length of the day in September in Waihee?
When is the sunrise / sunset in September in Waihee?
How many hours of sunshine does Waihee have in September?
When is the highest UV index in Waihee?
What is the UV index intensity in September in Waihee?
Average temperature in September
Waihee, HI
- Average high temperature in September: 79.9°F
The warmest month (with the highest average high temperature) is September (79.9°F).
The month with the lowest average high temperature is February (73.9°F).
- Average low temperature in September: 76.1°F
The month with the highest average low temperature is October (76.5°F).
The coldest months (with the lowest average low temperature) are February and March (70.7°F).
Average pressure in September
Waihee, HI
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is April (30.05"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in September
Waihee, HI
- Average wind speed in September: 11.9mph
The windiest month (with the highest average wind speed) is June (13.6mph).
The calmest month (with the lowest average wind speed) is January (10.4mph).
Average humidity in September
Waihee, HI
- Average humidity in September: 75%
The months with the highest relative humidity are July and August (76%).
The months with the lowest relative humidity are January and February (74%).
Average rainfall in September
Waihee, HI
- Average rainfall in September: 0.39"
The wettest months (with the highest rainfall) are March and December (0.87").
The driest month (with the least rainfall) is June (0.2").
Average rainfall days in September
Waihee, HI
- Average rainfall days in September: 8.1 days
The month with the highest number of rainy days is March (11.9 days).
The month with the least rainy days is June (6.6 days).
Average sea temperature in September
Waihee, HI
- Average sea temperature in September: 80.2°F
The best month for swimming (with the highest average sea temperature) is September (80.2°F).
The coldest month (with the lowest average sea temperature) is March (76°F).
Average daylight in September /
Average sunshine in September
Waihee, 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 54min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in September
Waihee, HI
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is June (19.9 days).
The month with the least sunshine days is March (15.2 days).
Average UV index in September
Waihee, HI
- Average UV index in September: 7
The months with the highest UV index are July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, November and December (UV index 6).
Average cloud cover in September
Waihee, HI
- Average cloud cover in September: 21
The month with the most cloud cover is March (Cloud cover 30).
The months with the least cloud cover are June and September (Cloud cover 21).
Average visibility in September
Waihee, 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).
Waihee, Hawaii, USA
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