September weather forecastKoza, Japan
September
Weather in September
September, the first month of the autumn in Koza, is still a warm month, with an average temperature varying between 23.7°C (74.7°F) and 26.3°C (79.3°F).Temperature
Koza marks the onset of September with an average high-temperature of a still warm 26.3°C (79.3°F), subtly divergent from August's 28.5°C (83.3°F). September nights register a minor temperature decline, steadying at a still moderately hot 23.7°C (74.7°F).Humidity
The average relative humidity in September in Koza is 77%.Rainfall
The month with the most rainfall is September, when the rain falls for 16.8 days and typically aggregates up to 144mm (5.67") of precipitation.Snowfall
In Koza, snow does not fall in March through December.Daylight
The average length of the day in September in Koza is 12h and 23min.On the first day of September in Koza, Japan, sunrise is at 05:30 and sunset at 18:22. On the last day of the month, sunrise is at 05:50 and sunset at 17:42 JST.
Sunshine
The average sunshine in September in Koza is 8.8h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Koza, Japan
- Average high temperature in September: 26.3°C
The warmest month (with the highest average high temperature) is August (28.5°C).
The month with the lowest average high temperature is January (11°C).
- Average low temperature in September: 23.7°C
The month with the highest average low temperature is August (26.3°C).
The coldest month (with the lowest average low temperature) is January (7.3°C).
Average pressure in September
Koza, Japan
- Average pressure in September: 1012mbar
The month with the highest atmospheric pressure is January (1019mbar).
The month with the lowest atmospheric pressure is June (1008.8mbar).
Average wind speed in September
Koza, Japan
- Average wind speed in September: 17km/h
The windiest month (with the highest average wind speed) is January (22.6km/h).
The calmest months (with the lowest average wind speed) are July and August (15.9km/h).
Average humidity in September
Koza, Japan
- Average humidity in September: 77%
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is January (66%).
Average rainfall in September
Koza, Japan
- Average rainfall in September: 144mm
The wettest month (with the highest rainfall) is September (144mm).
The driest month (with the least rainfall) is December (37mm).
Average rainfall days in September
Koza, Japan
- Average rainfall days in September: 16.8 days
The month with the highest number of rainy days is June (17.5 days).
The month with the least rainy days is January (8.4 days).
Average snowfall days in September
Koza, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Koza, 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 48min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).
Average sunshine days in September
Koza, Japan
- Average sunshine days in September: 9.9 days
The month with the most sunshine days is January (19.7 days).
The month with the least sunshine days is September (9.9 days).
Average UV index in September
Koza, Japan
- Average UV index in September: 6
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Koza, Japan
- Average cloud cover in September: 38
The month with the most cloud cover is June (Cloud cover 47).
The month with the least cloud cover is January (Cloud cover 27).
Average visibility in September
Koza, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
