September weather forecastIrifune, Japan
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Irifune, Japan, with an average temperature ranging between max 26.7°C (80.1°F) and min 21.1°C (70°F).Temperature
In Irifune, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's tropical 30.8°C (87.4°F) to a warm 26.7°C (80.1°F). During September, the average low-temperature in Irifune is a pleasant 21.1°C (70°F).Humidity
In September, the average relative humidity is 76%.Rainfall
In September, the rain falls for 17.5 days. Throughout September, 116mm (4.57") of precipitation is accumulated. Throughout the year, in Irifune, there are 169.8 rainfall days, and 926mm (36.46") of precipitation is accumulated.Snowfall
March through December are months without snowfall in Irifune.Daylight
In September, the average length of the day in Irifune is 12h and 25min.On the first day of the month, sunrise is at 05:13 and sunset at 18:08. On the last day of September, in Irifune, sunrise is at 05:35 and sunset at 17:26 JST.
Sunshine
In September, the average sunshine is 7.7h.UV index
In September, the average daily maximum UV index in Irifune is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.Note: The UV index of 6 during September translates into the following guidance:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Irifune, Japan
- Average high temperature in September: 26.7°C
The warmest month (with the highest average high temperature) is August (30.8°C).
The month with the lowest average high temperature is January (8.8°C).
- Average low temperature in September: 21.1°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 (2.8°C).
Average pressure in September
Irifune, Japan
- Average pressure in September: 1013.5mbar
The month with the highest atmospheric pressure is November (1018.1mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in September
Irifune, Japan
- Average wind speed in September: 12.2km/h
The windiest month (with the highest average wind speed) is April (15.1km/h).
The calmest month (with the lowest average wind speed) is November (11.8km/h).
Average humidity in September
Irifune, Japan
- Average humidity in September: 76%
The month with the highest relative humidity is July (79%).
The month with the lowest relative humidity is January (61%).
Average rainfall in September
Irifune, Japan
- Average rainfall in September: 116mm
The wettest month (with the highest rainfall) is October (129mm).
The driest months (with the least rainfall) are January and December (40mm).
Average rainfall days in September
Irifune, Japan
- Average rainfall days in September: 17.5 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in September
Irifune, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (43mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Irifune, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Irifune, 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 0min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).
Average sunshine days in September
Irifune, Japan
- Average sunshine days in September: 10 days
The month with the most sunshine days is January (21.3 days).
The month with the least sunshine days is September (10 days).
Average UV index in September
Irifune, Japan
- Average UV index in September: 6
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Irifune, Japan
- Average cloud cover in September: 41
The month with the most cloud cover is June (Cloud cover 46).
The month with the least cloud cover is January (Cloud cover 29).
Average visibility in September
Irifune, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, August, November and December (10km).
The months with the lowest visibility are June, July, September and October (9km).
