September weather forecastYorii, Japan
September
Weather in September
September, the first month of the autumn in Yorii, is still a warm month, with an average temperature fluctuating between 18°C (64.4°F) and 25.5°C (77.9°F).Temperature
September marks a gentle change in average high-temperature, declining from August's tropical 30.3°C (86.5°F) to a moderately hot 25.5°C (77.9°F). Yorii experiences a mean temperature of 18°C (64.4°F) during September nights.Humidity
The average relative humidity in September in Yorii is 77%.Rainfall
In Yorii, during September, the rain falls for 17.5 days and regularly aggregates up to 100mm (3.94") of precipitation. Throughout the year, in Yorii, there are 166.8 rainfall days, and 796mm (31.34") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September in Yorii is 12h and 25min.On the first day of the month, sunrise is at 05:15 and sunset at 18:11. On the last day of September, in Yorii, sunrise is at 05:37 and sunset at 17:28 JST.
Sunshine
In September, the average sunshine is 7.8h.UV index
In Yorii, Japan, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Take precautions - Protection against sun damage is advised. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Yorii, Japan
- Average high temperature in September: 25.5°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 (6.4°C).
- Average low temperature in September: 18°C
The month with the highest average low temperature is August (22.4°C).
The coldest month (with the lowest average low temperature) is January (-0.9°C).
Average pressure in September
Yorii, Japan
- Average pressure in September: 1013.8mbar
The month with the highest atmospheric pressure is November (1018.5mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in September
Yorii, Japan
- Average wind speed in September: 6.8km/h
The windiest month (with the highest average wind speed) is January (10km/h).
The calmest month (with the lowest average wind speed) is July (6.3km/h).
Average humidity in September
Yorii, Japan
- Average humidity in September: 77%
The month with the highest relative humidity is July (78%).
The month with the lowest relative humidity is January (62%).
Average rainfall in September
Yorii, Japan
- Average rainfall in September: 100mm
The wettest month (with the highest rainfall) is October (122mm).
The driest months (with the least rainfall) are February and December (22mm).
Average rainfall days in September
Yorii, Japan
- Average rainfall days in September: 17.5 days
The month with the highest number of rainy days is July (22.9 days).
The month with the least rainy days is January (5.6 days).
Average snowfall in September
Yorii, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (58mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Yorii, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Yorii, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 7h and 48min
The months with the most sunshine are May and August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 24min).
Average sunshine days in September
Yorii, Japan
- Average sunshine days in September: 9.9 days
The month with the most sunshine days is December (22.5 days).
The month with the least sunshine days is July (5.6 days).
Average UV index in September
Yorii, Japan
- Average UV index in September: 5
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 2).
Average cloud cover in September
Yorii, Japan
- Average cloud cover in September: 43
The month with the most cloud cover is June (Cloud cover 46).
The month with the least cloud cover is January (Cloud cover 25).
Average visibility in September
Yorii, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, November and December (10km).
The months with the lowest visibility are April, May, June, July, August, September and October (9km).
