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
Ahuimanu witnesses its highest average temperatures during August and September, peaking at 81°F (27.2°C).Heat index
September's heat index is estimated at a hot 86°F (30°C). Continuous activity in exposure could lead to a feeling of fatigue and heat cramps.Given the heat index, its values are aligned with shaded sites and gentle winds. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Humidity
The months with the lowest humidity in Ahuimanu, Hawaii, are January, May, June, September and November, with an average relative humidity of 75%.Rainfall
In Ahuimanu, in September, it is raining for 14.5 days, with typically 1.1" (28mm) of accumulated precipitation. In Ahuimanu, Hawaii, during the entire year, the rain falls for 187.1 days and collects up to 15.83" (402mm) of precipitation.Daylight
The average length of the day in September in Ahuimanu is 12h and 15min.On the first day of the month, sunrise is at 6:14 am and sunset at 6:47 pm. On the last day of September, sunrise is at 6:22 am and sunset at 6:19 pm HST.
Sunshine
In September, the average sunshine in Ahuimanu is 9h.UV index
The months with the highest UV index in Ahuimanu are July through 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 rays for ordinary individuals.Note: An average maximum UV index of 7 in September leads to these recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Frequently asked questions
What month is the hottest in Ahuimanu?
What are the temperatures in Ahuimanu in September?
What are the least humid months in Ahuimanu?
What is the average humidity in September in Ahuimanu?
How many days does it rain in September in Ahuimanu?
What is the average length of the day in September in Ahuimanu?
When is the sunrise / sunset in September in Ahuimanu?
How long on average sun shines in September in Ahuimanu?
What is the month with the highest UV index in Ahuimanu?
How high is the UV index in September in Ahuimanu?
Average temperature in September
Ahuimanu, HI
- Average high temperature in September: 81°F
The warmest months (with the highest average high temperature) are August and September (81°F).
The month with the lowest average high temperature is February (74.3°F).
- Average low temperature in September: 76.3°F
The month with the highest average low temperature is August (76.6°F).
The coldest month (with the lowest average low temperature) is February (69.6°F).
Average pressure in September
Ahuimanu, HI
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in September
Ahuimanu, HI
- Average wind speed in September: 11.4mph
The windiest month (with the highest average wind speed) is July (13.5mph).
The calmest month (with the lowest average wind speed) is January (10.3mph).
Average humidity in September
Ahuimanu, HI
- Average humidity in September: 75%
The months with the highest relative humidity are February, March, April, July, August, October and December (76%).
The months with the lowest relative humidity are January, May, June, September and November (75%).
Average rainfall in September
Ahuimanu, HI
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is March (2.01").
The driest month (with the least rainfall) is July (0.71").
Average rainfall days in September
Ahuimanu, HI
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is March (18.3 days).
The month with the least rainy days is June (13.5 days).
Average daylight in September /
Average sunshine in September
Ahuimanu, 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 0min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in September
Ahuimanu, HI
- Average sunshine days in September: 11.2 days
The month with the most sunshine days is June (12.2 days).
The month with the least sunshine days is April (6.5 days).
Average UV index in September
Ahuimanu, HI
- Average UV index in September: 7
The months with the highest UV index are July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, October, November and December (UV index 6).
Average cloud cover in September
Ahuimanu, HI
- Average cloud cover in September: 32
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in September
Ahuimanu, 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).
Ahuimanu, Hawaii, USA
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