September weather forecastShowajima, Japan
September
Weather in September
The first month of the autumn, September, is still a warm month in Showajima, Japan, with temperature in the range of an average high of 26.5°C (79.7°F) and an average low of 21.6°C (70.9°F).Temperature
September's onset brings a negligible change in high-temperatures, falling from a moderately hot 29.8°C (85.6°F) in August to a still warm 26.5°C (79.7°F). Showajima's nocturnal September readings average at an agreeable 21.6°C (70.9°F), showing little variation from the daytime temperatures.Humidity
In September, the average relative humidity is 76%.Rainfall
In September, the rain falls for 14 days. Throughout September, 87mm (3.43") of precipitation is accumulated. In Showajima, during the entire year, the rain falls for 154.1 days and collects up to 754mm (29.69") of precipitation.Snowfall
April through December are months without snowfall.Daylight
The average length of the day in September in Showajima is 12h and 25min.On the first day of September in Showajima, 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
In Showajima, the average sunshine in September is 7.9h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A typical high UV index of 6 in September suggests the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Showajima, Japan
- Average high temperature in September: 26.5°C
The warmest month (with the highest average high temperature) is August (29.8°C).
The month with the lowest average high temperature is January (8.9°C).
- Average low temperature in September: 21.6°C
The month with the highest average low temperature is August (24.9°C).
The coldest month (with the lowest average low temperature) is January (3.4°C).
Average pressure in September
Showajima, Japan
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is November (1018mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in September
Showajima, Japan
- Average wind speed in September: 13.9km/h
The windiest month (with the highest average wind speed) is April (17.3km/h).
The calmest month (with the lowest average wind speed) is June (13.6km/h).
Average humidity in September
Showajima, Japan
- Average humidity in September: 76%
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is January (61%).
Average rainfall in September
Showajima, Japan
- Average rainfall in September: 87mm
The wettest month (with the highest rainfall) is October (100mm).
The driest month (with the least rainfall) is December (36mm).
Average rainfall days in September
Showajima, Japan
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is June (16 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in September
Showajima, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (37mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Showajima, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2 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
Showajima, Japan
- Average daylight in September: 12h and 24min
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 54min
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 30min).
Average sunshine days in September
Showajima, Japan
- Average sunshine days in September: 13.6 days
The month with the most sunshine days is January (20.9 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in September
Showajima, Japan
- Average UV index in September: 6
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
Showajima, Japan
- Average cloud cover in September: 39
The months with the most cloud cover are June and October (Cloud cover 45).
The month with the least cloud cover is January (Cloud cover 31).
Average visibility in September
Showajima, 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).
