September weather forecastOka, Japan
September
Weather in September
September, the first month of the autumn in Oka, is also a moderately hot month, with temperature in the range of an average low of 19.6°C (67.3°F) and an average high of 27.1°C (80.8°F).Temperature
A subtle shift in Oka's weather is observed as August turns into September, with the average high temperature reducing from a tropical 31.5°C (88.7°F) to a warm 27.1°C (80.8°F). Oka experiences a consistent average temperature of 19.6°C (67.3°F) throughout the nights in September.Heat index
September's average heat index is calculated to be a hot 30°C (86°F). Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.Be informed that the heat index values are oriented around shady conditions and gentle breezes. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. 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 great significance to children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Humidity
The average relative humidity in September is 76%.Rainfall
In Oka, during September, the rain falls for 15.1 days and regularly aggregates up to 78mm (3.07") of precipitation. In Oka, during the entire year, the rain falls for 177.4 days and collects up to 831mm (32.72") of precipitation.Snowfall
In Oka, snow does not fall in April through November.Daylight
The average length of the day in September in Oka is 12h and 24min.On the first day of September in Oka, sunrise is at 05:30 and sunset at 18:24. On the last day of the month, sunrise is at 05:51 and sunset at 17:43 JST.
Sunshine
In September, the average sunshine is 9h.UV index
In September, the average daily maximum UV index in Oka, Japan, is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 5 during September translates into the following guidance:
Undertake precautions - Guarding against sun damage is counselled. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Oka, Japan
- Average high temperature in September: 27.1°C
The warmest month (with the highest average high temperature) is August (31.5°C).
The month with the lowest average high temperature is January (7.3°C).
- Average low temperature in September: 19.6°C
The month with the highest average low temperature is August (23.9°C).
The coldest month (with the lowest average low temperature) is January (1.6°C).
Average pressure in September
Oka, Japan
- Average pressure in September: 1012.7mbar
The month with the highest atmospheric pressure is February (1019.6mbar).
The month with the lowest atmospheric pressure is June (1008.8mbar).
Average wind speed in September
Oka, Japan
- Average wind speed in September: 7.2km/h
The windiest month (with the highest average wind speed) is January (10.1km/h).
The calmest month (with the lowest average wind speed) is June (7.1km/h).
Average humidity in September
Oka, Japan
- Average humidity in September: 76%
The month with the highest relative humidity is July (78%).
The months with the lowest relative humidity are April and May (70%).
Average rainfall in September
Oka, Japan
- Average rainfall in September: 78mm
The wettest month (with the highest rainfall) is July (146mm).
The driest month (with the least rainfall) is November (37mm).
Average rainfall days in September
Oka, Japan
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is July (21.3 days).
The month with the least rainy days is May (11.8 days).
Average snowfall in September
Oka, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (50mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Oka, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.3 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
Oka, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The months with the least sunshine are January and February (Average sunshine: 4h and 54min).
Average sunshine days in September
Oka, Japan
- Average sunshine days in September: 12.7 days
The month with the most sunshine days is May (18 days).
The month with the least sunshine days is July (6.9 days).
Average UV index in September
Oka, 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
Oka, Japan
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Oka, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
