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 arrival of September marks a slight shift to an average high-temperature of a still moderately hot 80.4°F (26.9°C) from August's 80.8°F (27.1°C). Kaumakani, during September nights, witnesses an average temperature marginally cooler than its daytime highs, at a still moderately hot 76.3°F (24.6°C).Humidity
The months with the lowest humidity in Kaumakani are January, May, September and November, with an average relative humidity of 74%.Rainfall
In Kaumakani, during September, the rain falls for 13.3 days and regularly aggregates up to 0.87" (22mm) of precipitation. Throughout the year, in Kaumakani, there are 172.7 rainfall days, and 15.75" (400mm) of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 16min.On the first day of the month, sunrise is at 6:21 am and sunset at 6:54 pm. On the last day of September, in Kaumakani, sunrise is at 6:29 am and sunset at 6:26 pm HST.
Sunshine
In September, the average sunshine is 9.3h.UV index
The months with the highest UV index are July through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A daily maximum UV index of 7 in September translates into the following instructions:
Guard against overexposure. Protection from sun-induced harm is essential. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Frequently asked questions
What is the temperature in September in Kaumakani?
What is the least humid month in Kaumakani?
What is the average humidity in September in Kaumakani?
How much does it rain in Kaumakani in September?
How many hours of daylight does Kaumakani have in September?
When are sunrise and sunset in September in Kaumakani?
How long on average sun shines in September in Kaumakani?
What is the month with the highest UV index in Kaumakani?
How high is the UV index in September in Kaumakani?
Average temperature in September
Kaumakani, HI
- Average high temperature in September: 80.4°F
The warmest month (with the highest average high temperature) is August (80.8°F).
The months with the lowest average high temperature are February and March (73.4°F).
- Average low temperature in September: 76.3°F
The month with the highest average low temperature is September (76.3°F).
The coldest month (with the lowest average low temperature) is February (69.1°F).
Average pressure in September
Kaumakani, HI
- Average pressure in September: 29.98"Hg
The months with the highest atmospheric pressure are March and April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.98"Hg).
Average wind speed in September
Kaumakani, HI
- Average wind speed in September: 9.1mph
The windiest month (with the highest average wind speed) is March (10.7mph).
The calmest month (with the lowest average wind speed) is May (8.6mph).
Average humidity in September
Kaumakani, HI
- Average humidity in September: 74%
The months with the highest relative humidity are February, March, April, June, July, August, October and December (75%).
The months with the lowest relative humidity are January, May, September and November (74%).
Average rainfall in September
Kaumakani, HI
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is March (2.2").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days in September
Kaumakani, HI
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is March (16.8 days).
The month with the least rainy days is January (11.5 days).
Average daylight in September /
Average sunshine in September
Kaumakani, HI
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is November (Average sunshine: 7h and 6min).
Average sunshine days in September
Kaumakani, HI
- Average sunshine days in September: 11 days
The month with the most sunshine days is January (13.8 days).
The month with the least sunshine days is November (6.7 days).
Average UV index in September
Kaumakani, 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
Kaumakani, HI
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 35).
The months with the least cloud cover are January and September (Cloud cover 28).
Average visibility in September
Kaumakani, 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).
Kaumakani, Hawaii, USA
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