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 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 transition into September notes an average high-temperature of a still moderately hot 28.6°C (83.5°F), revealing a mild distinction from the 29.5°C (85.1°F) in August. September nights witness a mild cool down to an average low of 27.4°C (81.3°F).Heat index
In September, the average heat index is appraised at a tropical 33°C (91.4°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
In Namihira, Japan, the average relative humidity in September is 79%.Rainfall
In Namihira, in September, during 19.1 rainfall days, 114mm (4.49") of precipitation is typically accumulated. Throughout the year, in Namihira, there are 215.5 rainfall days, and 1300mm (51.18") of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 19min.On the first day of September, sunrise is at 06:08 and sunset at 18:49. On the last day of the month, sunrise is at 06:21 and sunset at 18:16 JST.
Sunshine
In September, the average sunshine in Namihira is 8.6h.UV index
June through September, with an average maximum UV index of 7, are months with the highest UV index in Namihira. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.Note: The UV index of 7 during September leads to these advisories:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Frequently asked questions
How hot is it in Namihira in September?
What is the average humidity in September in Namihira?
How many days does it rain in September in Namihira?
What is the average length of the day in September in Namihira?
When are sunrise and sunset in September in Namihira?
How many hours of sunshine does Namihira have in September?
What is the month with the highest UV index in Namihira?
What is the UV index reading in September in Namihira?
Average temperature in September
Namihira, 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: 27.4°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
Namihira, 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
Namihira, Japan
- Average wind speed in September: 22.6km/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
Namihira, 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
Namihira, Japan
- Average rainfall in September: 114mm
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
Namihira, Japan
- Average rainfall days in September: 19.1 days
The month with the highest number of rainy days is October (19.7 days).
The month with the least rainy days is July (16.1 days).
Average daylight in September /
Average sunshine in September
Namihira, Japan
- Average daylight in September: 12h and 2min
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 4min
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
Namihira, Japan
- Average sunshine days in September: 7.1 days
The month with the most sunshine days is July (12.6 days).
The month with the least sunshine days is September (7.1 days).
Average UV index in September
Namihira, 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
Namihira, Japan
- Average cloud cover in September: 36
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
Namihira, 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).
Namihira, Japan
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