September weather forecastSasebo, Japan
September
Weather in September
September marks the start of autumn in Sasebo. It experiences a steady decrease in temperatures, contrasted by a sharp reduction in rainfall compared to August. The city sees pleasant weather during this period with shorter days and less intense sunlight. The descending temperatures bring a refreshing change, making September an enjoyable month to visit Sasebo. This transition month prepares the city for the cool autumn ahead.Temperature
In September, the meteorological conditions change slightly, with the average high-temperature moving from 29.6°C (85.3°F) in August to a still warm 26.4°C (79.5°F). Sasebo's nighttime temperature in September experiences a slight dip from daytime highs, falling to an average of 21.8°C (71.2°F).Humidity
In Sasebo, the average relative humidity in September is 79%.Rainfall
In Sasebo, in September, it is raining for 14.3 days, with typically 67mm (2.64") of accumulated precipitation. In Sasebo, during the entire year, the rain falls for 169 days and collects up to 900mm (35.43") of precipitation.Snowfall
March through November are months without snowfall.Sea temperature
In Sasebo, Japan, the average seawater temperature in September is 26.3°C (79.3°F).Note: For swimming, diving, and various water activities, the temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as highly enjoyable and comfortable for extended durations without any discomfort.
Daylight
In September, the average length of the day in Sasebo, Japan, is 12h and 23min.On the first day of the month, sunrise is at 05:55 and sunset at 18:46. On the last day of September, in Sasebo, Japan, sunrise is at 06:14 and sunset at 18:07 JST.
Sunshine
In Sasebo, Japan, the average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September in Sasebo, Japan, is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 6 transforms into these recommendations:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Notice! The Sun's UV exposure elevates with sand and water reflections.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sasebo, Japan
- Average high temperature in September: 26.4°C
The warmest month (with the highest average high temperature) is August (29.6°C).
The month with the lowest average high temperature is January (9.3°C).
- Average low temperature in September: 21.8°C
The month with the highest average low temperature is August (24.8°C).
The coldest month (with the lowest average low temperature) is January (5.4°C).
Average pressure in September
Sasebo, Japan
- Average pressure in September: 1011.9mbar
The month with the highest atmospheric pressure is January (1022.2mbar).
The month with the lowest atmospheric pressure is June (1008mbar).
Average wind speed in September
Sasebo, Japan
- Average wind speed in September: 13.6km/h
The windiest months (with the highest average wind speed) are January and December (16.7km/h).
The calmest month (with the lowest average wind speed) is June (10.6km/h).
Average humidity in September
Sasebo, Japan
- Average humidity in September: 79%
The month with the highest relative humidity is July (87%).
The month with the lowest relative humidity is March (71%).
Average rainfall in September
Sasebo, Japan
- Average rainfall in September: 67mm
The wettest month (with the highest rainfall) is July (192mm).
The driest month (with the least rainfall) is January (38mm).
Average rainfall days in September
Sasebo, Japan
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is May (9.5 days).
Average snowfall in September
Sasebo, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (6mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Sasebo, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.6 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in September
Sasebo, Japan
- Average sea temperature in September: 26.3°C
The best month for swimming (with the highest average sea temperature) is August (27.7°C).
The coldest month (with the lowest average sea temperature) is March (14.7°C).
Average daylight in September /
Average sunshine in September
Sasebo, 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 12min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The months with the least sunshine are January and December (Average sunshine: 4h and 30min).
Average sunshine days in September
Sasebo, Japan
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is May (20.2 days).
The months with the least sunshine days are July and December (9.5 days).
Average UV index in September
Sasebo, 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
Sasebo, Japan
- Average cloud cover in September: 38
The months with the most cloud cover are January and December (Cloud cover 51).
The month with the least cloud cover is October (Cloud cover 33).
Average visibility in September
Sasebo, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, September, October, November and December (10km).
The months with the lowest visibility are May, June, July and August (9km).
