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 sea temperature 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
Shimonoseki's transition into September involves a gentle shift in temperature, receding from a warm 29.7°C (85.5°F) in August to a still moderately hot 26°C (78.8°F). Shimonoseki, during September nights, witnesses an average temperature marginally cooler than its daytime highs, at a pleasant 21.4°C (70.5°F).Humidity
The average relative humidity in September is 78%.Rainfall
In Shimonoseki, Japan, in September, during 15 rainfall days, 84mm (3.31") of precipitation is typically accumulated. In Shimonoseki, during the entire year, the rain falls for 176.5 days and collects up to 1039mm (40.91") of precipitation.Snowfall
In Shimonoseki, Japan, snow does not fall in March through November.Sea temperature
In September, the average sea temperature is 25.9°C (78.6°F).Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) are ideal for swimming, diving, and similar water activities, ensuring pleasure and comfort for extended periods without feeling uneasy.
Daylight
The average length of the day in September is 12h and 23min.On the first day of September in Shimonoseki, sunrise is at 05:49 and sunset at 18:42. On the last day of the month, sunrise is at 06:10 and sunset at 18:02 JST.
Sunshine
In September, the average sunshine in Shimonoseki is 8.5h.UV index
The average daily maximum UV index in September in Shimonoseki is 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, an average UV index of 6 transforms into the following instructions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be wary! Reflections from sand and water make UV radiation more intense.
Frequently asked questions
What is the temperature in September in Shimonoseki?
What is the average humidity in September in Shimonoseki?
How many days does it rain in September in Shimonoseki?
When it does not snow in Shimonoseki?
What is the sea water temperature in September in Shimonoseki?
How many hours of daylight does Shimonoseki have in September?
What time are sunrise and sunset in September in Shimonoseki?
How many hours of sunshine does Shimonoseki have in September?
How high is the UV index in September in Shimonoseki?
Average temperature in September
Shimonoseki, Japan
- Average high temperature in September: 26°C
The warmest month (with the highest average high temperature) is August (29.7°C).
The month with the lowest average high temperature is January (8.8°C).
- Average low temperature in September: 21.4°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 (5.3°C).
Average pressure in September
Shimonoseki, Japan
- Average pressure in September: 1012.4mbar
The month with the highest atmospheric pressure is January (1021.9mbar).
The month with the lowest atmospheric pressure is June (1008.3mbar).
Average wind speed in September
Shimonoseki, Japan
- Average wind speed in September: 12.9km/h
The windiest month (with the highest average wind speed) is December (17.6km/h).
The calmest month (with the lowest average wind speed) is June (10.8km/h).
Average humidity in September
Shimonoseki, Japan
- Average humidity in September: 78%
The month with the highest relative humidity is July (85%).
The months with the lowest relative humidity are January, February and March (69%).
Average rainfall in September
Shimonoseki, Japan
- Average rainfall in September: 84mm
The wettest month (with the highest rainfall) is July (209mm).
The driest month (with the least rainfall) is January (44mm).
Average rainfall days in September
Shimonoseki, Japan
- Average rainfall days in September: 15 days
The month with the highest number of rainy days is July (20.7 days).
The month with the least rainy days is May (10.7 days).
Average snowfall in September
Shimonoseki, 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
Shimonoseki, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.3 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
Shimonoseki, Japan
- Average sea temperature in September: 25.9°C
The best month for swimming (with the highest average sea temperature) is August (27.4°C).
The coldest month (with the lowest average sea temperature) is March (13.8°C).
Average daylight in September /
Average sunshine in September
Shimonoseki, Japan
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Shimonoseki, Japan
- Average sunshine days in September: 13.3 days
The month with the most sunshine days is May (18.8 days).
The month with the least sunshine days is July (7.3 days).
Average UV index in September
Shimonoseki, 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 and December (UV index 2).
Average cloud cover in September
Shimonoseki, Japan
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Shimonoseki, Japan
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, August, September, October, November and December (10km).
The months with the lowest visibility are January, May, June and July (9km).
Shimonoseki, Japan
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