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
September
Weather in September
Temperature
September brings a marginal elevation to a still moderately hot 28.5°C (83.3°F) from August's 29.3°C (84.7°F) in Shiraho's average high-temperatures. Shiraho's nighttime temperature in September consistently rests at a still moderately hot 27.5°C (81.5°F).Heat index
September's heat index is evaluated at a tropical 33°C (91.4°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.Heat index guidelines indicate values are for light wind scenarios and shaded regions. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
The average relative humidity in September is 79%.Rainfall
In Shiraho, in September, it is raining for 19.3 days, with typically 138mm (5.43") of accumulated precipitation. In Shiraho, during the entire year, the rain falls for 228 days and collects up to 1184mm (46.61") of precipitation.Daylight
The average length of the day in September in Shiraho is 12h and 18min.On the first day of the month, sunrise is at 06:24 and sunset at 19:01. On the last day of September, in Shiraho, sunrise is at 06:34 and sunset at 18:31 JST.
Sunshine
In September, the average sunshine is 8.3h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 7 in September translates into the following recommendations:
Deflect overexposure. Sun protection is a necessity. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Shiraho?
What is the average humidity in September in Shiraho?
How many days does it rain in September in Shiraho?
How many hours of daylight does Shiraho have in September?
When are sunrise and sunset in September in Shiraho?
How long on average sun shines in September in Shiraho?
When is the highest UV index in Shiraho?
What is the UV index intensity in September in Shiraho?
Average temperature in September
Shiraho, Japan
- Average high temperature in September: 28.5°C
The warmest months (with the highest average high temperature) are July and August (29.3°C).
The month with the lowest average high temperature is January (20.6°C).
- Average low temperature in September: 27.5°C
The month with the highest average low temperature is July (28.4°C).
The coldest month (with the lowest average low temperature) is January (18.7°C).
Average pressure in September
Shiraho, Japan
- Average pressure in September: 1008.7mbar
The month with the highest atmospheric pressure is January (1020.3mbar).
The month with the lowest atmospheric pressure is August (1005.6mbar).
Average wind speed in September
Shiraho, Japan
- Average wind speed in September: 25.1km/h
The windiest month (with the highest average wind speed) is December (32.9km/h).
The calmest month (with the lowest average wind speed) is May (20.4km/h).
Average humidity in September
Shiraho, Japan
- Average humidity in September: 79%
The month with the highest relative humidity is June (85%).
The months with the lowest relative humidity are January and December (76%).
Average rainfall in September
Shiraho, Japan
- Average rainfall in September: 138mm
The wettest month (with the highest rainfall) is August (217mm).
The driest month (with the least rainfall) is March (50mm).
Average rainfall days in September
Shiraho, Japan
- Average rainfall days in September: 19.3 days
The month with the highest number of rainy days is August (22.1 days).
The month with the least rainy days is April (16.7 days).
Average daylight in September /
Average sunshine in September
Shiraho, Japan
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 36min).
The month with the shortest days is December (Average daylight: 10h and 42min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in September
Shiraho, Japan
- Average sunshine days in September: 8.2 days
The month with the most sunshine days is June (11.8 days).
The month with the least sunshine days is November (6.2 days).
Average UV index in September
Shiraho, Japan
- Average UV index in September: 7
The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January, February, March and December (UV index 5).
Average cloud cover in September
Shiraho, Japan
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in September
Shiraho, Japan
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
