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
Shifting into September, Wahiawa records an average high-temperature of a still warm 82.4°F (28°C), presenting minor fluctuations compared to the previous month. In Wahiawa, the average low-temperature during September nights tends to settle at a still moderately hot 74.3°F (23.5°C), indicating a slight drop from the daytime peak.Heat index
Throughout September, the heat index is appraised at a tropical 87.8°F (31°C). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.Heat index guidelines indicate values are for light wind scenarios and shaded regions. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', blends air temperature and moisture content to represent the felt temperature to humans. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Humidity
September is the least humid month, with an average relative humidity of 73%.Rainfall
In Wahiawa, in September, it is raining for 23.1 days, with typically 1.81" (46mm) of accumulated precipitation. In Wahiawa, during the entire year, the rain falls for 252.2 days and collects up to 22.09" (561mm) of precipitation.Daylight
In September, the average length of the day is 12h and 16min.On the first day of September in Wahiawa, sunrise is at 6:15 am and sunset at 6:47 pm. On the last day of the month, sunrise is at 6:23 am and sunset at 6:20 pm HST.
Sunshine
The average sunshine in September in Wahiawa is 7.5h.UV index
The months with the highest UV index in Wahiawa are March through November, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 6 suggests these recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Frequently asked questions
How hot is September in Wahiawa?
What is the least humid month in Wahiawa?
What is the average humidity in September in Wahiawa?
How much does it rain in Wahiawa in September?
How many hours of daylight does Wahiawa have in September?
When are sunrise and sunset in September in Wahiawa?
How many hours of sunshine does Wahiawa have in September?
What is the month with the highest UV index in Wahiawa?
How high is the UV index in September in Wahiawa?
Average temperature in September
Wahiawa, HI
- Average high temperature in September: 82.4°F
The warmest month (with the highest average high temperature) is August (82.6°F).
The month with the lowest average high temperature is February (75.6°F).
- Average low temperature in September: 74.3°F
The month with the highest average low temperature is September (74.3°F).
The coldest month (with the lowest average low temperature) is February (66.7°F).
Average pressure in September
Wahiawa, 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
Wahiawa, HI
- Average wind speed in September: 8.5mph
The windiest months (with the highest average wind speed) are June and July (10.2mph).
The calmest month (with the lowest average wind speed) is October (7.6mph).
Average humidity in September
Wahiawa, HI
- Average humidity in September: 73%
The months with the highest relative humidity are February and December (77%).
The month with the lowest relative humidity is September (73%).
Average rainfall in September
Wahiawa, HI
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is October (2.6").
The driest month (with the least rainfall) is July (1.26").
Average rainfall days in September
Wahiawa, HI
- Average rainfall days in September: 23.1 days
The month with the highest number of rainy days is August (23.8 days).
The month with the least rainy days is January (16 days).
Average daylight in September /
Average sunshine in September
Wahiawa, 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: 7h and 3min
The month with the most sunshine is June (Average sunshine: 8h and 24min).
The month with the least sunshine is November (Average sunshine: 5h and 36min).
Average sunshine days in September
Wahiawa, HI
- Average sunshine days in September: 3.5 days
The month with the most sunshine days is January (10.8 days).
The month with the least sunshine days is August (3.3 days).
Average UV index in September
Wahiawa, HI
- Average UV index in September: 6
The months with the highest UV index are March, April, May, June, July, August, September, October and November (UV index 6).
The months with the lowest UV index are January, February and December (UV index 5).
Average cloud cover in September
Wahiawa, HI
- Average cloud cover in September: 47
The month with the most cloud cover is June (Cloud cover 52).
The month with the least cloud cover is January (Cloud cover 43).
Average visibility in September
Wahiawa, 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).
Wahiawa, Hawaii, USA
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