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
In Oiso, the average high-temperature in September slightly decreases from a warm 29.2°C (84.6°F) in August to a still moderately hot 25.4°C (77.7°F). In Oiso, nights during September observe an average temperature decrease to a pleasant 20.4°C (68.7°F).Humidity
The average relative humidity in September is 78%.Rainfall
In September, in Oiso, the rain falls for 14.8 days. Throughout September, 59mm (2.32") of precipitation is accumulated. In Oiso, during the entire year, the rain falls for 165.4 days and collects up to 524mm (20.63") of precipitation.Snowfall
In Oiso, snow does not fall in April through December.Daylight
The average length of the day in September in Oiso is 12h and 25min.On the first day of September, sunrise is at 05:15 and sunset at 18:10. On the last day of the month, sunrise is at 05:36 and sunset at 17:28 JST.
Sunshine
The average sunshine in September in Oiso is 8.2h.UV index
In Oiso, 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 the ordinary person.Note: The UV index of 5 during September translates into the following guidance:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Frequently asked questions
What is the average September temperature in Oiso?
What is the average humidity in September in Oiso?
How much does it rain in Oiso in September?
When it does not snow in Oiso?
What is the average length of the day in September in Oiso?
When is the sunrise / sunset in September in Oiso?
How many hours of sunshine does Oiso have in September?
What is the UV index intensity in September in Oiso?
Average temperature in September
Oiso, Japan
- Average high temperature in September: 25.4°C
The warmest month (with the highest average high temperature) is August (29.2°C).
The month with the lowest average high temperature is January (8.3°C).
- Average low temperature in September: 20.4°C
The month with the highest average low temperature is August (24°C).
The coldest month (with the lowest average low temperature) is January (2.8°C).
Average pressure in September
Oiso, Japan
- Average pressure in September: 1013.3mbar
The month with the highest atmospheric pressure is November (1018.1mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).
Average wind speed in September
Oiso, Japan
- Average wind speed in September: 12.6km/h
The windiest months (with the highest average wind speed) are March and April (14.9km/h).
The calmest month (with the lowest average wind speed) is June (12km/h).
Average humidity in September
Oiso, Japan
- Average humidity in September: 78%
The months with the highest relative humidity are June and July (81%).
The month with the lowest relative humidity is January (63%).
Average rainfall in September
Oiso, Japan
- Average rainfall in September: 59mm
The wettest month (with the highest rainfall) is July (81mm).
The driest months (with the least rainfall) are January and February (19mm).
Average rainfall days in September
Oiso, Japan
- Average rainfall days in September: 14.8 days
The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is December (7.5 days).
Average snowfall in September
Oiso, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (7mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Oiso, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.4 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
Oiso, 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: 8h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in September
Oiso, Japan
- Average sunshine days in September: 11.4 days
The month with the most sunshine days is December (20.2 days).
The month with the least sunshine days is July (6.5 days).
Average UV index in September
Oiso, Japan
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Oiso, Japan
- Average cloud cover in September: 38
The month with the most cloud cover is June (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 27).
Average visibility in September
Oiso, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
Oiso, Japan
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