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
The dawn of September sees an average high-temperature of a still moderately hot 26°C (78.8°F), subtly contrasting with August's 28.8°C (83.8°F). Yokosuka's temperature during September nights registers a minor decrease to an average low of 22.3°C (72.1°F).Humidity
The average relative humidity in September is 77%.Rainfall
In Yokosuka, in September, it is raining for 15.2 days, with typically 106mm (4.17") of accumulated precipitation. In Yokosuka, during the entire year, the rain falls for 150.9 days and collects up to 867mm (34.13") of precipitation.Snowfall
April through December are months without snowfall in Yokosuka, Japan.Sea temperature
In Yokosuka, the average seawater temperature in September is 25.9°C (78.6°F).Note: Surface water temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as ideal and highly pleasant for extended enjoyment in all water activities.
Daylight
The average length of the day in September is 12h and 25min.On the first day of September in Yokosuka, 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 17:27 JST.
Sunshine
In September, the average sunshine is 8.2h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 6 suggests this advice:
Prevent overexposure. Protection from the sun's harmful effects is needed. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat. Be on guard! The reflective nature of sand and water boosts UV exposure.
Frequently asked questions
What is the average September temperature in Yokosuka?
What is the average humidity in September in Yokosuka?
How much does it rain in Yokosuka in September?
When it does not snow in Yokosuka?
What is the sea water temperature in September in Yokosuka?
How many hours of daylight does Yokosuka have in September?
When is the sunrise / sunset in September in Yokosuka?
How long on average sun shines in September in Yokosuka?
What is the UV index intensity in September in Yokosuka?
Average temperature in September
Yokosuka, Japan
- Average high temperature in September: 26°C
The warmest month (with the highest average high temperature) is August (28.8°C).
The month with the lowest average high temperature is January (9.8°C).
- Average low temperature in September: 22.3°C
The month with the highest average low temperature is August (25.3°C).
The coldest month (with the lowest average low temperature) is January (5.3°C).
Average pressure in September
Yokosuka, Japan
- Average pressure in September: 1013.2mbar
The month with the highest atmospheric pressure is November (1017.9mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).
Average wind speed in September
Yokosuka, Japan
- Average wind speed in September: 16.8km/h
The windiest month (with the highest average wind speed) is March (20.8km/h).
The calmest month (with the lowest average wind speed) is June (15.9km/h).
Average humidity in September
Yokosuka, Japan
- Average humidity in September: 77%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is January (61%).
Average rainfall in September
Yokosuka, Japan
- Average rainfall in September: 106mm
The wettest month (with the highest rainfall) is October (119mm).
The driest months (with the least rainfall) are February and December (39mm).
Average rainfall days in September
Yokosuka, Japan
- Average rainfall days in September: 15.2 days
The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is January (6.5 days).
Average snowfall in September
Yokosuka, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (10mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Yokosuka, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature in September
Yokosuka, Japan
- Average sea temperature in September: 25.9°C
The best month for swimming (with the highest average sea temperature) is August (26.2°C).
The coldest months (with the lowest average sea temperature) are February and March (16.2°C).
Average daylight in September /
Average sunshine in September
Yokosuka, 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: 8h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).
Average sunshine days in September
Yokosuka, Japan
- Average sunshine days in September: 11.6 days
The month with the most sunshine days is January (23.2 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in September
Yokosuka, 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 and December (UV index 3).
Average cloud cover in September
Yokosuka, Japan
- Average cloud cover in September: 36
The months with the most cloud cover are March, June and October (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Yokosuka, 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).
Yokosuka, Japan
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