September weather forecastItoigawa, Japan
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Itoigawa, Japan, with an average temperature ranging between min 16.6°C (61.9°F) and max 23.3°C (73.9°F).Temperature
The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a warm 27.8°C (82°F) in August to a still moderately hot 23.3°C (73.9°F). Itoigawa's average low-temperature in September is measured at an enjoyable 16.6°C (61.9°F).Humidity
In Itoigawa, the average relative humidity in September is 80%.Rainfall
In Itoigawa, in September, it is raining for 16.5 days, with typically 83mm (3.27") of accumulated precipitation. Throughout the year, in Itoigawa, there are 200.6 rainfall days, and 1190mm (46.85") of precipitation is accumulated.Snowfall
In Itoigawa, snow does not fall in May through October.Daylight
In Itoigawa, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 05:19 and sunset at 18:17. On the last day of September, sunrise is at 05:43 and sunset at 17:33 JST.
Sunshine
In September, the average sunshine is 8.3h.UV index
In September, the average daily maximum UV index in Itoigawa is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 5 in September translates into this advice:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Itoigawa, Japan
- Average high temperature in September: 23.3°C
The warmest month (with the highest average high temperature) is August (27.8°C).
The month with the lowest average high temperature is January (2.8°C).
- Average low temperature in September: 16.6°C
The month with the highest average low temperature is August (20.9°C).
The coldest month (with the lowest average low temperature) is February (-1.9°C).
Average pressure in September
Itoigawa, Japan
- Average pressure in September: 1013.9mbar
The month with the highest atmospheric pressure is November (1019.2mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in September
Itoigawa, Japan
- Average wind speed in September: 9km/h
The windiest months (with the highest average wind speed) are January and December (15.4km/h).
The calmest months (with the lowest average wind speed) are July and August (7.7km/h).
Average humidity in September
Itoigawa, Japan
- Average humidity in September: 80%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is May (74%).
Average rainfall in September
Itoigawa, Japan
- Average rainfall in September: 83mm
The wettest month (with the highest rainfall) is July (142mm).
The driest month (with the least rainfall) is May (57mm).
Average rainfall days in September
Itoigawa, Japan
- Average rainfall days in September: 16.5 days
The month with the highest number of rainy days is July (21.6 days).
The month with the least rainy days is February (10.3 days).
Average snowfall in September
Itoigawa, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (466mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Itoigawa, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.4 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
Itoigawa, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in September
Itoigawa, Japan
- Average sunshine days in September: 11.5 days
The month with the most sunshine days is May (15.1 days).
The month with the least sunshine days is January (4.3 days).
Average UV index in September
Itoigawa, Japan
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Itoigawa, Japan
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is May (Cloud cover 35).
Average visibility in September
Itoigawa, Japan
- Average visibility in September: 9km
The months with the highest visibility are October and November (10km).
The month with the lowest visibility is January (8km).
