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 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
September
Weather in September
Temperature
September's onset records an average high-temperature of a still warm 25.8°C (78.4°F), a near match to August's 28.3°C (82.9°F). Katsuura maintains a minor drop in temperature during September nights, with averages of 23.5°C (74.3°F).Humidity
In Katsuura, the average relative humidity in September is 78%.Rainfall
In Katsuura, in September, during 17.2 rainfall days, 118mm (4.65") of precipitation is typically accumulated. Throughout the year, there are 178.9 rainfall days, and 1201mm (47.28") of precipitation is accumulated.Snowfall
In Katsuura, snow does not fall in March through December.Sea temperature
August and September, with an average sea temperature of 26.3°C (79.3°F), are months with the warmest seawater in Katsuura.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
In Katsuura, the average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 05:11 and sunset at 18:05. On the last day of the month, sunrise is at 05:32 and sunset at 17:24 JST.
Sunshine
The average sunshine in September is 7.8h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index in Katsuura. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Boost your sun resistance with garments that are densely woven yet spacious. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Katsuura?
What is the average humidity in September in Katsuura?
How many days does it rain in September in Katsuura?
When it does not snow in Katsuura?
When is the sea warmest in Katsuura?
What is the sea water temperature in September in Katsuura?
How many hours of daylight does Katsuura have in September?
When is the sunrise / sunset in September in Katsuura?
How long on average sun shines in September in Katsuura?
What are the months with the highest UV index in Katsuura?
How high is the UV index in September in Katsuura?
Average temperature in September
Katsuura, Japan
- Average high temperature in September: 25.8°C
The warmest month (with the highest average high temperature) is August (28.3°C).
The month with the lowest average high temperature is January (10.6°C).
- Average low temperature in September: 23.5°C
The month with the highest average low temperature is August (25.6°C).
The coldest month (with the lowest average low temperature) is January (7°C).
Average pressure in September
Katsuura, Japan
- Average pressure in September: 1013.1mbar
The month with the highest atmospheric pressure is November (1017.6mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).
Average wind speed in September
Katsuura, Japan
- Average wind speed in September: 20.2km/h
The windiest month (with the highest average wind speed) is March (25.5km/h).
The calmest month (with the lowest average wind speed) is June (18.7km/h).
Average humidity in September
Katsuura, Japan
- Average humidity in September: 78%
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is January (63%).
Average rainfall in September
Katsuura, Japan
- Average rainfall in September: 118mm
The wettest month (with the highest rainfall) is October (164mm).
The driest month (with the least rainfall) is January (58mm).
Average rainfall days in September
Katsuura, Japan
- Average rainfall days in September: 17.2 days
The month with the highest number of rainy days is October (18.5 days).
The month with the least rainy days is January (9.6 days).
Average snowfall days in September
Katsuura, Japan
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.1 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature in September
Katsuura, Japan
- Average sea temperature in September: 26.3°C
The best months for swimming (with the highest average sea temperature) are August and September (26.3°C).
The coldest month (with the lowest average sea temperature) is February (17°C).
Average daylight in September /
Average sunshine in September
Katsuura, 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 36min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
Katsuura, Japan
- Average sunshine days in September: 11 days
The month with the most sunshine days is January (19.9 days).
The month with the least sunshine days is October (10.2 days).
Average UV index in September
Katsuura, Japan
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January and February (UV index 3).
Average cloud cover in September
Katsuura, Japan
- Average cloud cover in September: 39
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Katsuura, 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).
