September weather forecastOyama, Japan
September
Weather in September
September, the first month of the autumn in Oyama, is also a moderately hot month, with an average temperature varying between 19.1°C (66.4°F) and 26.5°C (79.7°F).Temperature
Oyama's weather subtly changes with the onset of September, barely falling from a hot 31.2°C (88.2°F) in August to a warm 26.5°C (79.7°F). Oyama's temperature tends to fall to an average low of 19.1°C (66.4°F) during the nights of September.Humidity
In Oyama, the average relative humidity in September is 75%.Rainfall
In Oyama, in September, it is raining for 9.3 days, with typically 18mm (0.71") of accumulated precipitation. In Oyama, during the entire year, the rain falls for 99.4 days and collects up to 187mm (7.36") of precipitation.Snowfall
In Oyama, snow does not fall in April through December.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 05:12 and sunset at 18:09. On the last day of September, sunrise is at 05:35 and sunset at 17:26 JST.
Sunshine
In September, the average sunshine in Oyama is 8h.UV index
In September, the average daily maximum UV index in Oyama is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. Around midday, solar radiation is most harmful; hence, exposure should be limited. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Oyama, Japan
- Average high temperature in September: 26.5°C
The warmest month (with the highest average high temperature) is August (31.2°C).
The month with the lowest average high temperature is January (7.1°C).
- Average low temperature in September: 19.1°C
The month with the highest average low temperature is August (23.3°C).
The coldest month (with the lowest average low temperature) is January (0.2°C).
Average pressure in September
Oyama, Japan
- Average pressure in September: 1013.8mbar
The month with the highest atmospheric pressure is November (1018.5mbar).
The month with the lowest atmospheric pressure is June (1009.3mbar).
Average wind speed in September
Oyama, Japan
- Average wind speed in September: 7.6km/h
The windiest month (with the highest average wind speed) is April (9.5km/h).
The calmest month (with the lowest average wind speed) is November (7km/h).
Average humidity in September
Oyama, Japan
- Average humidity in September: 75%
The month with the highest relative humidity is July (78%).
The month with the lowest relative humidity is January (61%).
Average rainfall in September
Oyama, Japan
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is July (35mm).
The driest month (with the least rainfall) is December (3mm).
Average rainfall days in September
Oyama, Japan
- Average rainfall days in September: 9.3 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is December (3.3 days).
Average snowfall in September
Oyama, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (4mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Oyama, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.9 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
Oyama, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 18min).
Average sunshine days in September
Oyama, Japan
- Average sunshine days in September: 17 days
The month with the most sunshine days is December (27.5 days).
The month with the least sunshine days is July (7.5 days).
Average UV index in September
Oyama, 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, February and December (UV index 2).
Average cloud cover in September
Oyama, Japan
- Average cloud cover in September: 40
The month with the most cloud cover is June (Cloud cover 46).
The month with the least cloud cover is January (Cloud cover 25).
Average visibility in September
Oyama, 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).
