September weather forecastNakaoshi, Japan
September
Weather in September
The first month of the autumn, September, is still a warm month in Nakaoshi, Japan, with an average temperature fluctuating between 28.7°C (83.7°F) and 26.9°C (80.4°F).Temperature
The onset of September manifests an average high-temperature of a still warm 28.7°C (83.7°F), demonstrating a minor variation from the preceding month. Nakaoshi's nighttime average temperature in September subtly descends to a still warm 26.9°C (80.4°F) from the daily highs.Heat index
The heat index in September is estimated at a hot 34°C (93.2°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.Heat index determinations are made taking into account the shade and light air movements. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
Humidity
The average relative humidity in September is 79%.Rainfall
In Nakaoshi, during September, the rain falls for 20 days and regularly aggregates up to 132mm (5.2") of precipitation. Throughout the year, there are 229 rainfall days, and 1489mm (58.62") of precipitation is accumulated.Daylight
In Nakaoshi, the average length of the day in September is 12h and 19min.On the first day of September, sunrise is at 06:07 and sunset at 18:48. On the last day of the month, sunrise is at 06:19 and sunset at 18:15 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 value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 7 during September morphs into the following directions:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Nakaoshi, Japan
- Average high temperature in September: 28.7°C
The warmest month (with the highest average high temperature) is August (29.4°C).
The month with the lowest average high temperature is January (18.6°C).
- Average low temperature in September: 26.9°C
The month with the highest average low temperature is August (27.8°C).
The coldest month (with the lowest average low temperature) is January (16.3°C).
Average pressure in September
Nakaoshi, Japan
- Average pressure in September: 1009.2mbar
The month with the highest atmospheric pressure is January (1021mbar).
The month with the lowest atmospheric pressure is August (1006.7mbar).
Average wind speed in September
Nakaoshi, Japan
- Average wind speed in September: 21.4km/h
The windiest month (with the highest average wind speed) is December (25.7km/h).
The calmest month (with the lowest average wind speed) is May (18.4km/h).
Average humidity in September
Nakaoshi, Japan
- Average humidity in September: 79%
The month with the highest relative humidity is June (87%).
The month with the lowest relative humidity is January (72%).
Average rainfall in September
Nakaoshi, Japan
- Average rainfall in September: 132mm
The wettest month (with the highest rainfall) is June (228mm).
The driest month (with the least rainfall) is January (63mm).
Average rainfall days in September
Nakaoshi, Japan
- Average rainfall days in September: 20 days
The month with the highest number of rainy days is June (22.6 days).
The month with the least rainy days is November (16.2 days).
Average daylight in September /
Average sunshine in September
Nakaoshi, 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 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Nakaoshi, Japan
- Average sunshine days in September: 6.5 days
The month with the most sunshine days is May (11.1 days).
The month with the least sunshine days is June (5.4 days).
Average UV index in September
Nakaoshi, Japan
- Average UV index in September: 7
The months with the highest UV index are June, July, August and September (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in September
Nakaoshi, Japan
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in September
Nakaoshi, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is May (9km).
