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 sees an average high-temperature of a still warm 28.6°C (83.5°F), hardly diverging from August's 29.3°C (84.7°F). Miyakojima welcomes an average low temperature of 27.5°C (81.5°F) in September, a gentle shift from the day's high.Heat index
Throughout September, the heat index is estimated at a hot 33°C (91.4°F). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.For clarity, heat index numbers account for light winds and areas under shade. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', takes into account both air temperature and humidity to illustrate what people actually feel. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Humidity
In September, the average relative humidity in Miyakojima is 79%.Rainfall
In Miyakojima, Japan, in September, during 18.7 rainfall days, 134mm (5.28") of precipitation is typically accumulated. Throughout the year, there are 238.6 rainfall days, and 1342mm (52.83") of precipitation is accumulated.Daylight
The average length of the day in September in Miyakojima is 12h and 18min.On the first day of the month, sunrise is at 06:19 and sunset at 18:57. On the last day of September, in Miyakojima, Japan, sunrise is at 06:30 and sunset at 18:27 JST.
Sunshine
In Miyakojima, the average sunshine in September is 8.4h.UV index
The months with the highest UV index are June through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for average individuals.Note: The UV index of 7 in September translates into these instructions:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Frequently asked questions
How hot does it get in Miyakojima in September?
What is the average humidity in September in Miyakojima?
How many days does it rain in September in Miyakojima?
What is the average length of the day in September in Miyakojima?
When is the sunrise / sunset in September in Miyakojima?
How long on average sun shines in September in Miyakojima?
When is the highest UV index in Miyakojima?
How high is the UV index in September in Miyakojima?
Average temperature in September
Miyakojima, Japan
- Average high temperature in September: 28.6°C
The warmest month (with the highest average high temperature) is August (29.3°C).
The month with the lowest average high temperature is January (20.4°C).
- Average low temperature in September: 27.5°C
The month with the highest average low temperature is July (28.3°C).
The coldest month (with the lowest average low temperature) is January (18.4°C).
Average pressure in September
Miyakojima, Japan
- Average pressure in September: 1008.6mbar
The month with the highest atmospheric pressure is January (1020.4mbar).
The month with the lowest atmospheric pressure is August (1005.8mbar).
Average wind speed in September
Miyakojima, Japan
- Average wind speed in September: 25.4km/h
The windiest month (with the highest average wind speed) is December (32.6km/h).
The calmest month (with the lowest average wind speed) is May (20.8km/h).
Average humidity in September
Miyakojima, Japan
- Average humidity in September: 79%
The month with the highest relative humidity is June (85%).
The months with the lowest relative humidity are January and December (75%).
Average rainfall in September
Miyakojima, Japan
- Average rainfall in September: 134mm
The wettest month (with the highest rainfall) is August (223mm).
The driest month (with the least rainfall) is February (59mm).
Average rainfall days in September
Miyakojima, Japan
- Average rainfall days in September: 18.7 days
The month with the highest number of rainy days is January (24.2 days).
The month with the least rainy days is March (16.4 days).
Average daylight in September /
Average sunshine in September
Miyakojima, Japan
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).
- Average sunshine in September: 8h and 2min
The months with the most sunshine are June and July (Average sunshine: 9h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in September
Miyakojima, Japan
- Average sunshine days in September: 8.7 days
The month with the most sunshine days is March (10.8 days).
The month with the least sunshine days is December (3.7 days).
Average UV index in September
Miyakojima, Japan
- Average UV index in September: 7
The months with the highest UV index are June, July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in September
Miyakojima, Japan
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in September
Miyakojima, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (10km).
The month with the lowest visibility is August (9km).
Miyakojima, Japan
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