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
September indicates a minor shift in the average high-temperature, from August's hot 31.5°C (88.7°F) to a moderately hot 27.1°C (80.8°F). In September, the nighttime temperature in Osakasayama, Japan, lowers to an average of 19.6°C (67.3°F).Heat index
The heat index for September is estimated at a hot 30°C (86°F). If exposure and activity are sustained, they might cause a feeling of weariness, resulting in heat cramps.Metrics for the heat index primarily focus on shaded spots and light wind conditions. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Humidity
In September, the average relative humidity in Osakasayama is 76%.Rainfall
In Osakasayama, during September, the rain falls for 15.1 days and regularly aggregates up to 78mm (3.07") of precipitation. In Osakasayama, during the entire year, the rain falls for 177.4 days and collects up to 831mm (32.72") of precipitation.Snowfall
In Osakasayama, snow does not fall in April through November.Daylight
In September, the average length of the day in Osakasayama, Japan, is 12h and 24min.On the first day of the month, sunrise is at 05:31 and sunset at 18:24. On the last day of September, in Osakasayama, sunrise is at 05:51 and sunset at 17:43 JST.
Sunshine
The average sunshine in September in Osakasayama is 9h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Osakasayama?
What is the average humidity in September in Osakasayama?
How many days does it rain in September in Osakasayama?
When it does not snow in Osakasayama?
What is the average length of the day in September in Osakasayama?
What time are sunrise and sunset in September in Osakasayama?
How many hours of sunshine does Osakasayama have in September?
How high is the UV index in September in Osakasayama?
Average temperature in September
Osakasayama, 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
Osakasayama, 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
Osakasayama, 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
Osakasayama, 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
Osakasayama, 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
Osakasayama, 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
Osakasayama, 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
Osakasayama, 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
Osakasayama, Japan
- Average daylight in September: 12h and 2min
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
Osakasayama, 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
Osakasayama, 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
Osakasayama, 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
Osakasayama, 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).
