September weather forecastYoichi, Japan
September
Weather in September
September, the first month of the autumn in Yoichi, is still a refreshing month, with an average temperature varying between 13.2°C (55.8°F) and 19.5°C (67.1°F).Temperature
The move into September indicates a slight reduction in the average high-temperature, down from August's moderately hot 23°C (73.4°F) to a comfortable 19.5°C (67.1°F). Yoichi observes an average nighttime temperature of 13.2°C (55.8°F) during September.Humidity
In September, the average relative humidity is 83%.Rainfall
In Yoichi, in September, during 18.3 rainfall days, 86mm (3.39") of precipitation is typically accumulated. Throughout the year, there are 151.8 rainfall days, and 851mm (33.5") of precipitation is accumulated.Snowfall
June through September are months without snowfall in Yoichi.Sea temperature
In Yoichi, in September, the average water temperature is 20.9°C (69.6°F).Note: In water with a temperature of 20.9°C (69.6°F), swimming is not a joy for most people. The challenge of controlling breathing increases as the temperature dips from 21°C (69.8°F) to 15°C (59°F).
Daylight
The average length of the day in September in Yoichi is 12h and 31min.On the first day of the month, sunrise is at 05:01 and sunset at 18:12. On the last day of September, in Yoichi, sunrise is at 05:33 and sunset at 17:20 JST.
Sunshine
The average sunshine in September is 7.7h.UV index
In Yoichi, Japan, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: An average maximum UV index of 4 in September leads to these recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Yoichi, Japan
- Average high temperature in September: 19.5°C
The warmest month (with the highest average high temperature) is August (23°C).
The month with the lowest average high temperature is January (-3.3°C).
- Average low temperature in September: 13.2°C
The month with the highest average low temperature is August (16.8°C).
The coldest month (with the lowest average low temperature) is February (-8.2°C).
Average pressure in September
Yoichi, Japan
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is November (1016.1mbar).
The month with the lowest atmospheric pressure is July (1008.5mbar).
Average wind speed in September
Yoichi, Japan
- Average wind speed in September: 11.9km/h
The windiest month (with the highest average wind speed) is December (19km/h).
The calmest month (with the lowest average wind speed) is July (9.2km/h).
Average humidity in September
Yoichi, Japan
- Average humidity in September: 83%
The month with the highest relative humidity is July (88%).
The months with the lowest relative humidity are April and October (79%).
Average rainfall in September
Yoichi, Japan
- Average rainfall in September: 86mm
The wettest month (with the highest rainfall) is August (119mm).
The driest month (with the least rainfall) is April (43mm).
Average rainfall days in September
Yoichi, Japan
- Average rainfall days in September: 18.3 days
The month with the highest number of rainy days is July (20.2 days).
The month with the least rainy days is February (2.5 days).
Average snowfall in September
Yoichi, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (369mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Yoichi, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (26 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Yoichi, Japan
- Average sea temperature in September: 20.9°C
The best month for swimming (with the highest average sea temperature) is August (21.8°C).
The coldest month (with the lowest average sea temperature) is March (5.9°C).
Average daylight in September /
Average sunshine in September
Yoichi, Japan
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 7h and 42min
The months with the most sunshine are May and August (Average sunshine: 8h and 24min).
The month with the least sunshine is January (Average sunshine: 1h and 12min).
Average sunshine days in September
Yoichi, Japan
- Average sunshine days in September: 9.2 days
The month with the most sunshine days is May (14.8 days).
The month with the least sunshine days is January (3.1 days).
Average UV index in September
Yoichi, Japan
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Yoichi, Japan
- Average cloud cover in September: 42
The month with the most cloud cover is January (Cloud cover 89).
The month with the least cloud cover is September (Cloud cover 42).
Average visibility in September
Yoichi, Japan
- Average visibility in September: 9km
The month with the highest visibility is October (10km).
The month with the lowest visibility is January (7km).
