September weather forecastIwakura, Japan
September
Weather in September
The first month of the autumn, September, is still a warm month in Iwakura, Japan, with an average temperature varying between 18.6°C (65.5°F) and 26.9°C (80.4°F).Temperature
The onset of September brings a small change in high-temperatures, falling from a hot 32°C (89.6°F) in August to a warm 26.9°C (80.4°F). Iwakura, in the month of September, anticipates a consistent average low-temperature of 18.6°C (65.5°F).Humidity
In September, the average relative humidity in Iwakura is 77%.Rainfall
In Iwakura, in September, it is raining for 14.5 days, with typically 83mm (3.27") of accumulated precipitation. Throughout the year, there are 147.8 rainfall days, and 833mm (32.8") of precipitation is accumulated.Snowfall
March through November are months without snowfall in Iwakura.Daylight
In Iwakura, the average length of the day in September is 12h and 25min.On the first day of September in Iwakura, sunrise is at 05:25 and sunset at 18:19. On the last day of the month, sunrise is at 05:46 and sunset at 17:38 JST.
Sunshine
The average sunshine in September in Iwakura is 8.7h.UV index
In September, the average daily maximum UV index in Iwakura is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 5 translates into these guidelines:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Iwakura, Japan
- Average high temperature in September: 26.9°C
The warmest month (with the highest average high temperature) is August (32°C).
The month with the lowest average high temperature is January (6.6°C).
- Average low temperature in September: 18.6°C
The month with the highest average low temperature is August (23.2°C).
The coldest month (with the lowest average low temperature) is January (-0.3°C).
Average pressure in September
Iwakura, Japan
- Average pressure in September: 1013.2mbar
The month with the highest atmospheric pressure is November (1019.3mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).
Average wind speed in September
Iwakura, Japan
- Average wind speed in September: 6.7km/h
The windiest month (with the highest average wind speed) is March (8.5km/h).
The calmest month (with the lowest average wind speed) is July (6.3km/h).
Average humidity in September
Iwakura, Japan
- Average humidity in September: 77%
The month with the highest relative humidity is July (79%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Iwakura, Japan
- Average rainfall in September: 83mm
The wettest month (with the highest rainfall) is July (164mm).
The driest month (with the least rainfall) is January (19mm).
Average rainfall days in September
Iwakura, Japan
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is July (20.8 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in September
Iwakura, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (10mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Iwakura, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.8 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
Iwakura, 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: 8h and 42min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days in September
Iwakura, Japan
- Average sunshine days in September: 13 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is July (7.4 days).
Average UV index in September
Iwakura, Japan
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Iwakura, Japan
- Average cloud cover in September: 38
The month with the most cloud cover is July (Cloud cover 48).
The month with the least cloud cover is November (Cloud cover 32).
Average visibility in September
Iwakura, Japan
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, August, October, November and December (9km).
The months with the lowest visibility are June, July and September (8km).
