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 signals a gentle decrease in the average high-temperature, transitioning from a tropical 32.1°C (89.8°F) in August to a moderately hot 27.3°C (81.1°F). In the month of September, Shiraoka records a consistent average low-temperature of 20.1°C (68.2°F).Heat index
For most parts of September, the heat index is computed to be a hot 30°C (86°F). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', represents the fusion of temperature and moisture in the air to suggest how warm it feels. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
In September, the average relative humidity in Shiraoka is 73%.Rainfall
In Shiraoka, in September, during 16.4 rainfall days, 98mm (3.86") of precipitation is typically accumulated. Throughout the year, in Shiraoka, there are 161.6 rainfall days, and 782mm (30.79") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 25min.On the first day of the month, sunrise is at 05:13 and sunset at 18:09. On the last day of September, sunrise is at 05:35 and sunset at 17:26 JST.
Sunshine
In Shiraoka, the average sunshine in September is 7.6h.UV index
The average daily maximum UV index in September in Shiraoka is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Frequently asked questions
What is the usual temperature for Shiraoka in September?
What is the average humidity in September in Shiraoka?
How much does it rain in Shiraoka in September?
When it does not snow in Shiraoka?
What is the average length of the day in September in Shiraoka?
What time are sunrise and sunset in September in Shiraoka?
How long on average sun shines in September in Shiraoka?
What is the UV index reading in September in Shiraoka?
Average temperature in September
Shiraoka, Japan
- Average high temperature in September: 27.3°C
The warmest month (with the highest average high temperature) is August (32.1°C).
The month with the lowest average high temperature is January (8°C).
- Average low temperature in September: 20.1°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 (1°C).
Average pressure in September
Shiraoka, Japan
- Average pressure in September: 1013.7mbar
The month with the highest atmospheric pressure is November (1018.4mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in September
Shiraoka, Japan
- Average wind speed in September: 8.5km/h
The windiest month (with the highest average wind speed) is April (10.9km/h).
The calmest month (with the lowest average wind speed) is November (8.2km/h).
Average humidity in September
Shiraoka, Japan
- Average humidity in September: 73%
The months with the highest relative humidity are June and July (74%).
The month with the lowest relative humidity is January (59%).
Average rainfall in September
Shiraoka, Japan
- Average rainfall in September: 98mm
The wettest month (with the highest rainfall) is October (107mm).
The driest month (with the least rainfall) is December (26mm).
Average rainfall days in September
Shiraoka, Japan
- Average rainfall days in September: 16.4 days
The month with the highest number of rainy days is July (20.8 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in September
Shiraoka, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (39mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Shiraoka, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Shiraoka, Japan
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The months with the least sunshine are February and November (Average sunshine: 6h and 6min).
Average sunshine days in September
Shiraoka, Japan
- Average sunshine days in September: 10.5 days
The month with the most sunshine days is January (24.4 days).
The month with the least sunshine days is July (7.3 days).
Average UV index in September
Shiraoka, Japan
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Shiraoka, Japan
- Average cloud cover in September: 43
The month with the most cloud cover is June (Cloud cover 47).
The month with the least cloud cover is January (Cloud cover 26).
Average visibility in September
Shiraoka, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, November and December (10km).
The months with the lowest visibility are April, May, June, July, August, September and October (9km).
Shiraoka, Japan
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