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 31.9°C (89.4°F) in August to a moderately hot 27.6°C (81.7°F). In September, Sugasawa records an average nighttime temperature of 21.2°C (70.2°F).Heat index
The heat index in September is estimated at a tropical 30°C (86°F). Prolonged exposure and physical activity might induce exhaustion, potentially causing heat cramps.Understand that the heat index values take into account shaded locations and mild winds. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', arises from combining readings of air temperature and relative moisture content. 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. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
In Sugasawa, the average relative humidity in September is 71%.Rainfall
In Sugasawa, during September, the rain falls for 16.3 days and regularly aggregates up to 112mm (4.41") of precipitation. Throughout the year, there are 162.7 rainfall days, and 869mm (34.21") of precipitation is accumulated.Snowfall
In Sugasawa, snow does not fall in April through October and December.Daylight
The average length of the day in September is 12h and 25min.On the first day of September in Sugasawa, sunrise is at 05:13 and sunset at 18:09. On the last day of the month, sunrise is at 05:36 and sunset at 17:27 JST.
Sunshine
The average sunshine in September in Sugasawa is 7.6h.UV index
The average daily maximum UV index in September 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: The maximum UV index of 5 during September leads to these instructions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What are the temperatures in Sugasawa in September?
What is the average humidity in September in Sugasawa?
How many days does it rain in September in Sugasawa?
When it does not snow in Sugasawa?
How many hours of daylight does Sugasawa have in September?
When are sunrise and sunset in September in Sugasawa?
How long on average sun shines in September in Sugasawa?
How high is the UV index in September in Sugasawa?
Average temperature in September
Sugasawa, Japan
- Average high temperature in September: 27.6°C
The warmest month (with the highest average high temperature) is August (31.9°C).
The month with the lowest average high temperature is January (8.5°C).
- Average low temperature in September: 21.2°C
The month with the highest average low temperature is August (25°C).
The coldest month (with the lowest average low temperature) is January (2°C).
Average pressure in September
Sugasawa, Japan
- Average pressure in September: 1013.5mbar
The month with the highest atmospheric pressure is November (1018.2mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in September
Sugasawa, Japan
- Average wind speed in September: 10.9km/h
The windiest month (with the highest average wind speed) is April (12.9km/h).
The calmest month (with the lowest average wind speed) is November (10.1km/h).
Average humidity in September
Sugasawa, Japan
- Average humidity in September: 71%
The months with the highest relative humidity are June and July (74%).
The month with the lowest relative humidity is January (58%).
Average rainfall in September
Sugasawa, Japan
- Average rainfall in September: 112mm
The wettest month (with the highest rainfall) is October (121mm).
The driest months (with the least rainfall) are February and December (34mm).
Average rainfall days in September
Sugasawa, Japan
- Average rainfall days in September: 16.3 days
The month with the highest number of rainy days is July (18.7 days).
The month with the least rainy days is January (6.6 days).
Average snowfall in September
Sugasawa, 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, October and December (0mm).
Average snowfall days in September
Sugasawa, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are April, May, June, July, August, September, October and December (0 days).
Average daylight in September /
Average sunshine in September
Sugasawa, Japan
- Average daylight in September: 12h and 2min
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: 7h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 0min).
Average sunshine days in September
Sugasawa, Japan
- Average sunshine days in September: 10.8 days
The month with the most sunshine days is January (21.3 days).
The month with the least sunshine days is June (9.1 days).
Average UV index in September
Sugasawa, 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 February (UV index 2).
Average cloud cover in September
Sugasawa, Japan
- Average cloud cover in September: 42
The months with the most cloud cover are June and October (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 26).
Average visibility in September
Sugasawa, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, May, August, October, November and December (10km).
The months with the lowest visibility are April, June, July and September (9km).
Sugasawa, Japan
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