September weather forecastHateruma, Japan
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Hateruma, Japan, with temperature in the range of an average high of 28.5°C (83.3°F) and an average low of 27.5°C (81.5°F).Temperature
September's average high-temperature stands at a still warm 28.5°C (83.3°F), showing little deviation from August's 29.3°C (84.7°F). September nights anticipate an average temperature of 27.5°C (81.5°F), a modest decline from the daytime.Heat index
September's average heat index is calculated to be a tropical 33°C (91.4°F). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.Understanding the heat index involves considering values for shaded locales with light wind. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', measures the perceived warmth when incorporating the humidity present in the air. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are especially vital to children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Humidity
In September, the average relative humidity in Hateruma is 79%.Rainfall
In September, in Hateruma, the rain falls for 18.7 days. Throughout September, 143mm (5.63") of precipitation is accumulated. Throughout the year, in Hateruma, there are 245.4 rainfall days, and 1322mm (52.05") of precipitation is accumulated.Daylight
In Hateruma, the average length of the day in September is 12h and 17min.On the first day of September, sunrise is at 06:26 and sunset at 19:03. On the last day of the month, sunrise is at 06:36 and sunset at 18:33 JST.
Sunshine
In September, the average sunshine in Hateruma is 8.3h.UV index
The months with the highest UV index in Hateruma are May through September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 7 during September leads to these advisories:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hateruma, Japan
- Average high temperature in September: 28.5°C
The warmest months (with the highest average high temperature) are July and August (29.3°C).
The month with the lowest average high temperature is January (20.5°C).
- Average low temperature in September: 27.5°C
The month with the highest average low temperature is July (28.4°C).
The coldest month (with the lowest average low temperature) is January (18.6°C).
Average pressure in September
Hateruma, Japan
- Average pressure in September: 1008.8mbar
The month with the highest atmospheric pressure is January (1020.4mbar).
The month with the lowest atmospheric pressure is August (1005.6mbar).
Average wind speed in September
Hateruma, Japan
- Average wind speed in September: 24.8km/h
The windiest month (with the highest average wind speed) is December (32.7km/h).
The calmest month (with the lowest average wind speed) is May (20.2km/h).
Average humidity in September
Hateruma, 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 (77%).
Average rainfall in September
Hateruma, Japan
- Average rainfall in September: 143mm
The wettest month (with the highest rainfall) is August (207mm).
The driest month (with the least rainfall) is February (70mm).
Average rainfall days in September
Hateruma, Japan
- Average rainfall days in September: 18.7 days
The month with the highest number of rainy days is January (25.3 days).
The month with the least rainy days is July (16.8 days).
Average daylight in September /
Average sunshine in September
Hateruma, Japan
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 13h and 36min).
The month with the shortest days is December (Average daylight: 10h and 42min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is June (Average sunshine: 9h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days in September
Hateruma, Japan
- Average sunshine days in September: 9.1 days
The month with the most sunshine days is July (12.3 days).
The months with the least sunshine days are January and December (3.5 days).
Average UV index in September
Hateruma, Japan
- Average UV index in September: 7
The months with the highest UV index are May, 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
Hateruma, Japan
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in September
Hateruma, Japan
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
