September weather forecastAdaniya, Japan
September
Weather in September
The first month of the autumn, September, is still a warm month in Adaniya, Japan, with an average temperature ranging between max 28.6°C (83.5°F) and min 27.2°C (81°F).Temperature
September's commencement is accompanied by an average high-temperature of a still warm 28.6°C (83.5°F), diverging marginally from August's 29.5°C (85.1°F). In Adaniya, September is characterized by an average low-temperature of 27.2°C (81°F), indicating a minor drop from daytime highs.Heat index
September's mean heat index is appraised at a tropical 33°C (91.4°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Humidity
In September, the average relative humidity is 79%.Rainfall
In Adaniya, in September, it is raining for 19.7 days, with typically 127mm (5") of accumulated precipitation. Throughout the year, there are 216.1 rainfall days, and 1313mm (51.69") of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 19min.On the first day of the month, sunrise is at 06:08 and sunset at 18:48. On the last day of September, sunrise is at 06:20 and sunset at 18:16 JST.
Sunshine
In September, the average sunshine is 8.3h.UV index
June through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 7 transforms into these recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. 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
Adaniya, Japan
- Average high temperature in September: 28.6°C
The warmest month (with the highest average high temperature) is August (29.5°C).
The month with the lowest average high temperature is January (18.8°C).
- Average low temperature in September: 27.2°C
The month with the highest average low temperature is August (28.2°C).
The coldest month (with the lowest average low temperature) is January (16.8°C).
Average pressure in September
Adaniya, Japan
- Average pressure in September: 1009.1mbar
The month with the highest atmospheric pressure is January (1020.9mbar).
The month with the lowest atmospheric pressure is August (1006.6mbar).
Average wind speed in September
Adaniya, Japan
- Average wind speed in September: 22.2km/h
The windiest month (with the highest average wind speed) is December (27.6km/h).
The calmest month (with the lowest average wind speed) is May (19.5km/h).
Average humidity in September
Adaniya, Japan
- Average humidity in September: 79%
The month with the highest relative humidity is June (86%).
The month with the lowest relative humidity is January (72%).
Average rainfall in September
Adaniya, Japan
- Average rainfall in September: 127mm
The wettest month (with the highest rainfall) is June (198mm).
The driest months (with the least rainfall) are January and February (53mm).
Average rainfall days in September
Adaniya, Japan
- Average rainfall days in September: 19.7 days
The months with the highest number of rainy days are September and October (19.7 days).
The month with the least rainy days is July (16.1 days).
Average daylight in September /
Average sunshine in September
Adaniya, Japan
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Adaniya, Japan
- Average sunshine days in September: 6.8 days
The month with the most sunshine days is July (12.6 days).
The month with the least sunshine days is September (6.8 days).
Average UV index in September
Adaniya, Japan
- Average UV index in September: 7
The months with the highest UV index are June, July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in September
Adaniya, Japan
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in September
Adaniya, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).





