September weather forecastYamaga, Japan
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Yamaga, Japan, with an average temperature fluctuating between 27.7°C (81.9°F) and 21°C (69.8°F).Temperature
The arrival of September is marked by a minor reduction in average high-temperature, sliding from a tropical 31.3°C (88.3°F) in August to a moderately hot 27.7°C (81.9°F). During the month of September, an average low-temperature of 21°C (69.8°F) is recorded in Yamaga.Heat index
In September, the average heat index is calculated to be a hot 31°C (87.8°F). If one remains active during constant exposure, it might cause exhaustion and heat cramps.Know that the heat index computations account for shaded terrains and slight winds. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Humidity
In September, the average relative humidity is 76%.Rainfall
In September, in Yamaga, the rain falls for 15.6 days. Throughout September, 86mm (3.39") of precipitation is accumulated. In Yamaga, during the entire year, the rain falls for 164.6 days and collects up to 1175mm (46.26") of precipitation.Snowfall
In Yamaga, snow does not fall in March through November.Daylight
In Yamaga, the average length of the day in September is 12h and 23min.On the first day of September in Yamaga, sunrise is at 05:51 and sunset at 18:42. On the last day of the month, sunrise is at 06:10 and sunset at 18:03 JST.
Sunshine
In September, the average sunshine in Yamaga is 8.9h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 6 translates into these guidelines:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Yamaga, Japan
- Average high temperature in September: 27.7°C
The warmest month (with the highest average high temperature) is August (31.3°C).
The month with the lowest average high temperature is January (9.3°C).
- Average low temperature in September: 21°C
The month with the highest average low temperature is August (24.4°C).
The coldest month (with the lowest average low temperature) is January (3.3°C).
Average pressure in September
Yamaga, Japan
- Average pressure in September: 1011.9mbar
The month with the highest atmospheric pressure is January (1021.9mbar).
The month with the lowest atmospheric pressure is June (1008.2mbar).
Average wind speed in September
Yamaga, Japan
- Average wind speed in September: 8.4km/h
The windiest months (with the highest average wind speed) are March and October (9.7km/h).
The calmest month (with the lowest average wind speed) is June (7.7km/h).
Average humidity in September
Yamaga, Japan
- Average humidity in September: 76%
The month with the highest relative humidity is July (82%).
The months with the lowest relative humidity are March and April (71%).
Average rainfall in September
Yamaga, Japan
- Average rainfall in September: 86mm
The wettest month (with the highest rainfall) is July (251mm).
The driest month (with the least rainfall) is January (32mm).
Average rainfall days in September
Yamaga, Japan
- Average rainfall days in September: 15.6 days
The month with the highest number of rainy days is July (23 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in September
Yamaga, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (11mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Yamaga, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.7 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Yamaga, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in September
Yamaga, Japan
- Average sunshine days in September: 11.4 days
The month with the most sunshine days is January (20.1 days).
The month with the least sunshine days is July (5.8 days).
Average UV index in September
Yamaga, Japan
- Average UV index in September: 6
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Yamaga, Japan
- Average cloud cover in September: 35
The month with the most cloud cover is June (Cloud cover 49).
The month with the least cloud cover is October (Cloud cover 30).
Average visibility in September
Yamaga, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, October, November and December (10km).
The month with the lowest visibility is July (8km).
