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
September
Weather in September
Temperature
The transition into September involves a small decrease in the average high-temperature, dipping slightly from a tropical 31.4°C (88.5°F) in August to a moderately hot 27.4°C (81.3°F). Kowa, during the month of September, experiences an average low-temperature of 21.1°C (70°F).Heat index
The heat index value for September is computed to be a hot 30°C (86°F). Persisting in activity during exposure could lead to weariness and subsequently to heat cramps.One should be cognizant that the heat index values are tailored for shaded spots and mild winds. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', gauges the sensation of temperature factoring in the air's moisture content. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. 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
In September, the average relative humidity is 75%.Rainfall
In Kowa, in September, it is raining for 15.5 days, with typically 98mm (3.86") of accumulated precipitation. Throughout the year, in Kowa, there are 156 rainfall days, and 899mm (35.39") of precipitation is accumulated.Snowfall
In Kowa, snow does not fall in March through November.Daylight
In September, the average length of the day in Kowa, Japan, is 12h and 24min.On the first day of the month, sunrise is at 05:25 and sunset at 18:19. On the last day of September, in Kowa, sunrise is at 05:46 and sunset at 17:38 JST.
Sunshine
The average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September in Kowa is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 5 during September translates into these guidelines:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Kowa in September?
What is the average humidity in September in Kowa?
How much does it rain in Kowa in September?
When it does not snow in Kowa?
What is the average length of the day in September in Kowa?
When are sunrise and sunset in September in Kowa?
How many hours of sunshine does Kowa have in September?
How high is the UV index in September in Kowa?
Average temperature in September
Kowa, Japan
- Average high temperature in September: 27.4°C
The warmest month (with the highest average high temperature) is August (31.4°C).
The month with the lowest average high temperature is January (8.3°C).
- Average low temperature in September: 21.1°C
The month with the highest average low temperature is August (25°C).
The coldest month (with the lowest average low temperature) is January (2.6°C).
Average pressure in September
Kowa, 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 (1009mbar).
Average wind speed in September
Kowa, Japan
- Average wind speed in September: 10.2km/h
The windiest month (with the highest average wind speed) is January (14.3km/h).
The calmest month (with the lowest average wind speed) is July (9.1km/h).
Average humidity in September
Kowa, Japan
- Average humidity in September: 75%
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is February (69%).
Average rainfall in September
Kowa, Japan
- Average rainfall in September: 98mm
The wettest month (with the highest rainfall) is July (161mm).
The driest month (with the least rainfall) is January (27mm).
Average rainfall days in September
Kowa, Japan
- Average rainfall days in September: 15.5 days
The month with the highest number of rainy days is July (20.5 days).
The month with the least rainy days is November (8.6 days).
Average snowfall in September
Kowa, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (15mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Kowa, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.7 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
Kowa, 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 54min).
- Average sunshine in September: 8h and 4min
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
Kowa, Japan
- Average sunshine days in September: 12.1 days
The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is July (7.8 days).
Average UV index in September
Kowa, Japan
- Average UV index in September: 5
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
Kowa, Japan
- Average cloud cover in September: 37
The month with the most cloud cover is July (Cloud cover 43).
The month with the least cloud cover is November (Cloud cover 31).
Average visibility in September
Kowa, 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).
