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 transition into September reveals an average high-temperature of a still moderately hot 28.5°C (83.3°F), mirroring a close resemblance to August. During September's nights, Iheya notes a minor temperature decline, reaching an average of 27.1°C (80.8°F).Heat index
The heat index for September is appraised at a hot 33°C (91.4°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.When referencing the heat index, its values are suitable for shady environments and light breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Humidity
In Iheya, the average relative humidity in September is 79%.Rainfall
In Iheya, during September, the rain falls for 22.9 days and regularly aggregates up to 154mm (6.06") of precipitation. Throughout the year, there are 240.8 rainfall days, and 1563mm (61.54") of precipitation is accumulated.Daylight
In Iheya, the average length of the day in September is 12h and 19min.On the first day of the month, sunrise is at 06:07 and sunset at 18:48. On the last day of September, in Iheya, sunrise is at 06:20 and sunset at 18:15 JST.
Sunshine
In Iheya, the average sunshine in September is 8.1h.UV index
June through September, with an average maximum UV index of 7, are months with the highest UV index. 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 typical high UV index of 7 in September suggests the following recommendations:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Frequently asked questions
How hot is it in Iheya in September?
What is the average humidity in September in Iheya?
How many days does it rain in September in Iheya?
How many hours of daylight does Iheya have in September?
When are sunrise and sunset in September in Iheya?
How many hours of sunshine does Iheya have in September?
When is the highest UV index in Iheya?
What is the UV index reading in September in Iheya?
Average temperature in September
Iheya, Japan
- Average high temperature in September: 28.5°C
The warmest month (with the highest average high temperature) is August (29.5°C).
The month with the lowest average high temperature is January (18.6°C).
- Average low temperature in September: 27.1°C
The month with the highest average low temperature is August (28°C).
The coldest month (with the lowest average low temperature) is January (16.7°C).
Average pressure in September
Iheya, Japan
- Average pressure in September: 1009.2mbar
The month with the highest atmospheric pressure is January (1021.1mbar).
The month with the lowest atmospheric pressure is August (1006.6mbar).
Average wind speed in September
Iheya, Japan
- Average wind speed in September: 22.9km/h
The windiest month (with the highest average wind speed) is December (28.3km/h).
The calmest month (with the lowest average wind speed) is May (20.2km/h).
Average humidity in September
Iheya, Japan
- Average humidity in September: 79%
The month with the highest relative humidity is June (86%).
The months with the lowest relative humidity are January and December (72%).
Average rainfall in September
Iheya, Japan
- Average rainfall in September: 154mm
The wettest month (with the highest rainfall) is June (241mm).
The driest month (with the least rainfall) is January (64mm).
Average rainfall days in September
Iheya, Japan
- Average rainfall days in September: 22.9 days
The month with the highest number of rainy days is June (23.3 days).
The month with the least rainy days is November (17.6 days).
Average daylight in September /
Average sunshine in September
Iheya, Japan
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Iheya, Japan
- Average sunshine days in September: 3.8 days
The months with the most sunshine days are April and May (9.6 days).
The month with the least sunshine days is September (3.8 days).
Average UV index in September
Iheya, Japan
- Average UV index in September: 7
The months with the highest UV index are June, July, August and September (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in September
Iheya, Japan
- Average cloud cover in September: 40
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in September
Iheya, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is May (9km).
Iheya, Japan
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