September weather forecastHirabari, Japan
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Hirabari, Japan, with an average temperature ranging between min 20.3°C (68.5°F) and max 28.2°C (82.8°F).Temperature
With the onset of September, Hirabari's climate undergoes a slight change as the average high-temperature moves from a hot 32.5°C (90.5°F) in August to a warm 28.2°C (82.8°F). Nighttime temperature experiences an average drop to a pleasant 20.3°C (68.5°F) in September.Heat index
September's mean heat index is evaluated at a hot 31°C (87.8°F). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.When referencing the heat index, its values are suitable for shady environments and light breezes. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. 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 hold particular importance for children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Humidity
The average relative humidity in September is 72%.Rainfall
In Hirabari, in September, during 14.9 rainfall days, 129mm (5.08") of precipitation is typically accumulated. Throughout the year, there are 158.5 rainfall days, and 1122mm (44.17") of precipitation is accumulated.Snowfall
April through November are months without snowfall.Daylight
In Hirabari, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 05:24 and sunset at 18:19. On the last day of September, sunrise is at 05:46 and sunset at 17:37 JST.
Sunshine
The average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 6 during September translates into these guidelines:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hirabari, Japan
- Average high temperature in September: 28.2°C
The warmest month (with the highest average high temperature) is August (32.5°C).
The month with the lowest average high temperature is January (7.5°C).
- Average low temperature in September: 20.3°C
The month with the highest average low temperature is August (24.3°C).
The coldest month (with the lowest average low temperature) is January (0.8°C).
Average pressure in September
Hirabari, Japan
- Average pressure in September: 1013.1mbar
The month with the highest atmospheric pressure is November (1019.1mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).
Average wind speed in September
Hirabari, Japan
- Average wind speed in September: 8.4km/h
The windiest month (with the highest average wind speed) is March (10.2km/h).
The calmest months (with the lowest average wind speed) are June and July (7.7km/h).
Average humidity in September
Hirabari, Japan
- Average humidity in September: 72%
The month with the highest relative humidity is July (78%).
The month with the lowest relative humidity is May (68%).
Average rainfall in September
Hirabari, Japan
- Average rainfall in September: 129mm
The wettest month (with the highest rainfall) is July (195mm).
The driest month (with the least rainfall) is January (34mm).
Average rainfall days in September
Hirabari, Japan
- Average rainfall days in September: 14.9 days
The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is November (9.3 days).
Average snowfall in September
Hirabari, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (26mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Hirabari, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4 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
Hirabari, 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 42min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in September
Hirabari, Japan
- Average sunshine days in September: 13.2 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in September
Hirabari, Japan
- Average UV index in September: 6
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
Hirabari, Japan
- Average cloud cover in September: 38
The month with the most cloud cover is July (Cloud cover 44).
The month with the least cloud cover is November (Cloud cover 31).
Average visibility in September
Hirabari, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (9km).
The month with the lowest visibility is July (8km).
