September weather forecastUsui, Japan
September
Weather in September
September, the first month of the autumn in Usui, is still a warm month, with an average temperature varying between 26.4°C (79.5°F) and 21.8°C (71.2°F).Temperature
With the arrival of September, Usui notices a mild change in the average high-temperature, sliding from August's hot 30.3°C (86.5°F) to a warm 26.4°C (79.5°F). Nighttime in Usui, during September, brings an average low of 21.8°C (71.2°F), a modest reduction from the day's peak.Humidity
In September, the average relative humidity is 77%.Rainfall
In Usui, in September, during 10.4 rainfall days, 24mm (0.94") of precipitation is typically accumulated. In Usui, during the entire year, the rain falls for 110.2 days and collects up to 221mm (8.7") of precipitation.Snowfall
In Usui, Japan, snow does not fall in March through December.Daylight
In September, the average length of the day in Usui is 12h and 25min.On the first day of the month, sunrise is at 05:11 and sunset at 18:07. On the last day of September, sunrise is at 05:33 and sunset at 17:24 JST.
Sunshine
The average sunshine in September is 7.7h.UV index
In Usui, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: An average UV index of 6 in September transforms into this advice:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Usui, Japan
- Average high temperature in September: 26.4°C
The warmest month (with the highest average high temperature) is August (30.3°C).
The month with the lowest average high temperature is January (9.1°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 (3.7°C).
Average pressure in September
Usui, Japan
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is November (1017.9mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in September
Usui, Japan
- Average wind speed in September: 13.5km/h
The windiest month (with the highest average wind speed) is March (16.5km/h).
The calmest month (with the lowest average wind speed) is June (12.7km/h).
Average humidity in September
Usui, Japan
- Average humidity in September: 77%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is January (61%).
Average rainfall in September
Usui, Japan
- Average rainfall in September: 24mm
The wettest month (with the highest rainfall) is October (29mm).
The driest month (with the least rainfall) is January (9mm).
Average rainfall days in September
Usui, Japan
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is October (11.4 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in September
Usui, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (4mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Usui, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Usui, Japan
- Average daylight in September: 12h and 24min
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 42min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in September
Usui, Japan
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is October (15.6 days).
Average UV index in September
Usui, 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, February, March and December (UV index 3).
Average cloud cover in September
Usui, Japan
- Average cloud cover in September: 40
The month with the most cloud cover is June (Cloud cover 46).
The month with the least cloud cover is January (Cloud cover 30).
Average visibility in September
Usui, 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).
