September weather forecastMiyanoura, Japan
September weather forecast for Miyanoura, Japan: The first month of the autumn, September, is still a warm month in Miyanoura, Japan, with an average temperature fluctuating between 26.5°C (79.7°F) and 27.7°C (81.9°F). In September, the average heat index, which represents the influence of relative humidity on air temperature, is calculated to be 31°C (87.8°F).
September
Weather in September
The first month of the autumn, September, is still a warm month in Miyanoura, Japan, with an average temperature fluctuating between 26.5°C (79.7°F) and 27.7°C (81.9°F).Temperature
At the start of September, Miyanoura's average high-temperature reaches a still moderately hot 27.7°C (81.9°F), subtly different from the preceding month. Nighttime temperatures in Miyanoura, Japan, record an average of 26.5°C (79.7°F) throughout September.Heat index
Throughout September, the heat index is calculated to be a hot 31°C (87.8°F). Remaining active during long-lasting exposure could cause fatigue, leading to heat cramps.Observations indicate that the heat index values are for shady locations with light wind. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Humidity
In September, the average relative humidity is 77%.Rainfall
In September, the rain falls for 19.4 days. Throughout September, 121mm (4.76") of precipitation is accumulated. In Miyanoura, during the entire year, the rain falls for 222.2 days and collects up to 1453mm (57.2") of precipitation.Sea temperature
In September, the average sea temperature is 28°C (82.4°F).Note: Surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as excellent and extremely agreeable for enduring enjoyment in water activities.
Daylight
The average length of the day in September is 12h and 21min.On the first day of September, sunrise is at 05:54 and sunset at 18:40. On the last day of the month, sunrise is at 06:10 and sunset at 18:04 JST.
Sunshine
The average sunshine in September is 8.5h.UV index
July 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 health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the maximum UV index of 7 suggests these recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Attention! The reflection of both water and sand can increase the intensity of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Miyanoura, Japan
- Average high temperature in September: 27.7°C
The warmest month (with the highest average high temperature) is August (28.8°C).
The month with the lowest average high temperature is January (14.8°C).
- Average low temperature in September: 26.5°C
The month with the highest average low temperature is August (27.9°C).
The coldest month (with the lowest average low temperature) is January (12.6°C).
Average pressure in September
Miyanoura, Japan
- Average pressure in September: 1010.6mbar
The month with the highest atmospheric pressure is January (1020.8mbar).
The months with the lowest atmospheric pressure are June and August (1008.1mbar).
Average wind speed in September
Miyanoura, Japan
- Average wind speed in September: 22.1km/h
The windiest month (with the highest average wind speed) is January (29.6km/h).
The calmest month (with the lowest average wind speed) is July (19.2km/h).
Average humidity in September
Miyanoura, Japan
- Average humidity in September: 77%
The month with the highest relative humidity is July (84%).
The months with the lowest relative humidity are January, March, November and December (70%).
Average rainfall in September
Miyanoura, Japan
- Average rainfall in September: 121mm
The wettest month (with the highest rainfall) is June (283mm).
The driest month (with the least rainfall) is January (80mm).
Average rainfall days in September
Miyanoura, Japan
- Average rainfall days in September: 19.4 days
The month with the highest number of rainy days is June (21.8 days).
The month with the least rainy days is May (14.6 days).
Average sea temperature in September
Miyanoura, Japan
- Average sea temperature in September: 28°C
The best month for swimming (with the highest average sea temperature) is August (29°C).
The coldest month (with the lowest average sea temperature) is February (20°C).
Average daylight in September /
Average sunshine in September
Miyanoura, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Miyanoura, Japan
- Average sunshine days in September: 7.7 days
The month with the most sunshine days is May (14.8 days).
The month with the least sunshine days is December (6.2 days).
Average UV index in September
Miyanoura, Japan
- Average UV index in September: 7
The months with the highest UV index are July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Miyanoura, Japan
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in September
Miyanoura, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
