Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The start of September comes with a small reduction in the average high-temperature, subtly receding from a hot 31.6°C (88.9°F) in August to a warm 27.3°C (81.1°F). Asakayamacho's September nights cool down to an average low-temperature of 20.2°C (68.4°F).Heat index
For September, the heat index is evaluated at a tropical 30°C (86°F). Persisting in activity during exposure could lead to weariness and subsequently to heat cramps.Research indicates the heat index considers values in shaded locales and with light winds. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Humidity
The average relative humidity in September is 75%.Rainfall
In Asakayamacho, during September, the rain falls for 12 days and regularly aggregates up to 34mm (1.34") of precipitation. Throughout the year, there are 149 rainfall days, and 436mm (17.17") of precipitation is accumulated.Snowfall
In Asakayamacho, snow does not fall in April through November.Daylight
In Asakayamacho, the average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 05:31 and sunset at 18:24. On the last day of September, sunrise is at 05:51 and sunset at 17:43 JST.
Sunshine
The average sunshine in September is 9.1h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Be vigilant - Preventing sunburn is recommended. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September in Asakayamacho?
How many hours of sunshine does Asakayamacho have in September?
What is the UV index reading in September?
Average temperature in September
Asakayamacho, Japan
- Average high temperature in September: 27.3°C
The warmest month (with the highest average high temperature) is August (31.6°C).
The month with the lowest average high temperature is January (7.6°C).
- Average low temperature in September: 20.2°C
The month with the highest average low temperature is August (24.4°C).
The coldest month (with the lowest average low temperature) is January (2.2°C).
Average pressure in September
Asakayamacho, Japan
- Average pressure in September: 1012.7mbar
The month with the highest atmospheric pressure is February (1019.7mbar).
The month with the lowest atmospheric pressure is June (1008.8mbar).
Average wind speed in September
Asakayamacho, Japan
- Average wind speed in September: 7.9km/h
The windiest month (with the highest average wind speed) is January (10.6km/h).
The calmest month (with the lowest average wind speed) is June (7.8km/h).
Average humidity in September
Asakayamacho, Japan
- Average humidity in September: 75%
The month with the highest relative humidity is July (77%).
The month with the lowest relative humidity is May (69%).
Average rainfall in September
Asakayamacho, Japan
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is July (79mm).
The driest month (with the least rainfall) is November (20mm).
Average rainfall days in September
Asakayamacho, Japan
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is May (8.7 days).
Average snowfall in September
Asakayamacho, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (35mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Asakayamacho, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6 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
Asakayamacho, Japan
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The months with the least sunshine are January and February (Average sunshine: 4h and 48min).
Average sunshine days in September
Asakayamacho, Japan
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is May (20 days).
The month with the least sunshine days is January (10.8 days).
Average UV index in September
Asakayamacho, 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 and December (UV index 2).
Average cloud cover in September
Asakayamacho, Japan
- Average cloud cover in September: 35
The months with the most cloud cover are January and February (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Asakayamacho, Japan
- Average visibility in September: 9km
The months with the highest visibility are February, March, November and December (10km).
The months with the lowest visibility are January, April, May, June, July, August, September and October (9km).
Asakayamacho, Japan
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