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
The advent of September brings an average high-temperature of a still moderately hot 82.4°F (28°C), exhibiting minor difference from the previous month. Nighttime temperatures hover around an average low of 74.3°F (23.5°C) in September, a slight descent from daytime highs.Heat index
The heat index value for September is appraised at a hot 87.8°F (31°C). If one continues to be active during enduring exposure, it could result in fatigue and heat cramps.Bear in mind that the heat index values are determined for shaded areas and light breezes. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
The least humid month is September, with an average relative humidity of 73%.Rainfall
In Whitmore Village, Hawaii, during September, the rain falls for 23.1 days and regularly aggregates up to 1.81" (46mm) of precipitation. Throughout the year, in Whitmore Village, there are 252.2 rainfall days, and 22.09" (561mm) of precipitation is accumulated.Daylight
In Whitmore Village, the average length of the day in September is 12h and 16min.On the first day of September, 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
In Whitmore Village, the average sunshine in September is 7.5h.UV index
March through November, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.Note: A typical high UV index of 6 in September suggests the following recommendations:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the least humid month?
What is the average humidity in September?
How many days does it rain in September?
How many hours of daylight does Whitmore Village have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
When is the highest UV index?
What is the UV index reading in September?
Average temperature in September
Whitmore Village, 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
Whitmore Village, 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
Whitmore Village, 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
Whitmore Village, 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
Whitmore Village, 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
Whitmore Village, 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
Whitmore Village, 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
Whitmore Village, 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
Whitmore Village, 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
Whitmore Village, 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
Whitmore Village, 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).
Whitmore Village, Hawaii, USA
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