September weather forecastKamiunten, Japan
September
Weather in September
The first month of the autumn, September, is still a warm month in Kamiunten, Japan, with an average temperature ranging between max 28.7°C (83.7°F) and min 26.8°C (80.2°F).Temperature
The introduction of September notes a subtle temperature variation to a still warm 28.7°C (83.7°F) from August's 29.4°C (84.9°F). Kamiunten maintains an average of approximately a still warm 26.8°C (80.2°F) during September nights, with only a minimal decrease from the daytime temperature.Heat index
The average heat index in September is calculated to be a tropical 34°C (93.2°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.One should consider that heat index numbers are for shaded settings and light wind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Humidity
The average relative humidity in September is 79%.Rainfall
In Kamiunten, in September, it is raining for 20.8 days, with typically 155mm (6.1") of accumulated precipitation. Throughout the year, in Kamiunten, there are 229.8 rainfall days, and 1512mm (59.53") of precipitation is accumulated.Daylight
The average length of the day in September in Kamiunten is 12h and 19min.On the first day of September, sunrise is at 06:07 and sunset at 18:48. On the last day of the month, sunrise is at 06:20 and sunset at 18:15 JST.
Sunshine
The average sunshine in September in Kamiunten is 8.1h.UV index
The months with the highest UV index are June through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 7 in September interprets into the following recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Kamiunten, Japan
- Average high temperature in September: 28.7°C
The warmest month (with the highest average high temperature) is August (29.4°C).
The month with the lowest average high temperature is January (18.6°C).
- Average low temperature in September: 26.8°C
The month with the highest average low temperature is August (27.8°C).
The coldest month (with the lowest average low temperature) is January (16.3°C).
Average pressure in September
Kamiunten, Japan
- Average pressure in September: 1009.1mbar
The month with the highest atmospheric pressure is January (1021mbar).
The month with the lowest atmospheric pressure is August (1006.7mbar).
Average wind speed in September
Kamiunten, Japan
- Average wind speed in September: 20.9km/h
The windiest month (with the highest average wind speed) is December (25.7km/h).
The calmest month (with the lowest average wind speed) is May (18.4km/h).
Average humidity in September
Kamiunten, Japan
- Average humidity in September: 79%
The month with the highest relative humidity is June (87%).
The month with the lowest relative humidity is January (72%).
Average rainfall in September
Kamiunten, Japan
- Average rainfall in September: 155mm
The wettest month (with the highest rainfall) is June (228mm).
The driest month (with the least rainfall) is January (63mm).
Average rainfall days in September
Kamiunten, Japan
- Average rainfall days in September: 20.8 days
The month with the highest number of rainy days is June (22.6 days).
The month with the least rainy days is November (16.2 days).
Average daylight in September /
Average sunshine in September
Kamiunten, Japan
- Average daylight in September: 12h and 18min
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 6min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Kamiunten, Japan
- Average sunshine days in September: 5.9 days
The month with the most sunshine days is May (11.1 days).
The month with the least sunshine days is June (5.4 days).
Average UV index in September
Kamiunten, 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
Kamiunten, Japan
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in September
Kamiunten, 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).
