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 snowfall in September
- Average snowfall 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 onset of September brings a small shift in high-temperatures, falling from a hot 31°C (87.8°F) in August to a moderately hot 27°C (80.6°F). In the month of September, the average low-temperature usually rests at a pleasant 21.5°C (70.7°F).Heat index
September's heat index is calculated to be 29°C (84.2°F). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.It is emphasized that the heat index's values are meant for shaded zones with mild winds. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', arises from combining readings of air temperature and relative moisture content. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Humidity
The average relative humidity in September in Shirokane is 73%.Rainfall
The month with the most rainfall in Shirokane is September, when the rain falls for 13.3 days and typically aggregates up to 54mm (2.13") of precipitation.Snowfall
April through December are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 05:13 and sunset at 18:08. On the last day of the month, sunrise is at 05:35 and sunset at 17:26 JST.
Sunshine
The average sunshine in September is 7.9h.UV index
In September, the average daily maximum UV index in Shirokane is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: In September, a daily UV index of 5 turns into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What are September temperatures in Shirokane?
What is the average humidity in September in Shirokane?
What is the rainiest month in Shirokane?
How many days does it rain in September in Shirokane?
When it does not snow in Shirokane?
How many hours of daylight does Shirokane have in September?
When are sunrise and sunset in September in Shirokane?
How many hours of sunshine does Shirokane have in September?
What is the UV index intensity in September in Shirokane?
Average temperature in September
Shirokane, Japan
- Average high temperature in September: 27°C
The warmest month (with the highest average high temperature) is August (31°C).
The month with the lowest average high temperature is January (8.9°C).
- Average low temperature in September: 21.5°C
The month with the highest average low temperature is August (25.1°C).
The coldest month (with the lowest average low temperature) is January (2.8°C).
Average pressure in September
Shirokane, Japan
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is November (1018.1mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in September
Shirokane, Japan
- Average wind speed in September: 12.9km/h
The windiest month (with the highest average wind speed) is April (15.3km/h).
The calmest month (with the lowest average wind speed) is November (12.1km/h).
Average humidity in September
Shirokane, Japan
- Average humidity in September: 73%
The month with the highest relative humidity is July (77%).
The month with the lowest relative humidity is January (59%).
Average rainfall in September
Shirokane, Japan
- Average rainfall in September: 54mm
The wettest month (with the highest rainfall) is September (54mm).
The driest month (with the least rainfall) is December (21mm).
Average rainfall days in September
Shirokane, Japan
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in September
Shirokane, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (21mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Shirokane, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.3 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
Shirokane, Japan
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in September
Shirokane, Japan
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is September (14.3 days).
Average UV index in September
Shirokane, Japan
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover in September
Shirokane, Japan
- Average cloud cover in September: 40
The months with the most cloud cover are June and October (Cloud cover 43).
The month with the least cloud cover is January (Cloud cover 28).
Average visibility in September
Shirokane, 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).
Shirokane, Japan
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