September weather forecast
Oita, Japan

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Weather in September

September in Oita signifies the transition from summer to fall. It sees a decrease in temperature from the peak summer months, paving the way for a more comfortable climate. Rainfall witnesses a significant decrease as well, bringing relief from the high precipitation of the summer months. Despite the drop in temperature, the sea remains warm from the summer heat. Towards October, consistent weather patterns indicate the onset of fall and cooler temperatures.

Temperature

Oita in September undergoes a slight reduction in the average high-temperature, shifting from August's tropical 30°C (86°F) to a moderately hot 25.8°C (78.4°F). During the nights in September, Oita experiences a consistent average temperature of 19.7°C (67.5°F).

Humidity

In Oita, Japan, the average relative humidity in September is 82%.

Rainfall

In Oita, in September, during 14.9 rainfall days, 73mm (2.87") of precipitation is typically accumulated. In Oita, during the entire year, the rain falls for 145.1 days and collects up to 599mm (23.58") of precipitation.

Snowfall

April through November are months without snowfall in Oita.

Sea temperature

In Oita, Japan, in September, the average water temperature is 26°C (78.8°F).
Note: Swimming, diving, and other activities in water temperatures between 25°C (77°F) and 29°C (84.2°F) are thought to be quite enjoyable and satisfying for extended periods, with no discomfort.

Daylight

In Oita, the average length of the day in September is 12h and 23min.
On the first day of the month, sunrise is at 05:47 and sunset at 18:39. On the last day of September, in Oita, sunrise is at 06:07 and sunset at 17:59 JST.

Sunshine

The average sunshine in September is 8.7h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily high UV index of 5 in September translates into this advice:
Ensure safety - Imperative it is to shield skin and eyes from damage. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take note! Sand and water reflections strengthen the Sun's UV exposure.
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Frequently asked questions

What is the temperature in September in Oita?

Oita in September has an average high-temperature of 25.8°C (78.4°F) and an average low-temperature of 19.7°C (67.5°F). In August, the average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, is evaluated at 38°C (100.4°F).

What is the average humidity in September in Oita?

In Oita, Japan, the average relative humidity in September is 82%.

How many days does it rain in September in Oita?

In Oita, Japan, in September, it is raining for 14.9 days, with typically 73mm (2.87") of accumulated precipitation.

When it does not snow in Oita?

In Oita, Japan, snow does not fall in April through November.

How warm is the water in September in Oita?

In Oita, Japan, in September, the average water temperature is 26°C (78.8°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Oita have in September?

The average day length in September in Oita, Japan, is 12h and 23min.

What time are sunrise and sunset in September in Oita?

In September, on the first day of the month, sunrise is at 05:47 and sunset at 18:39. On the last day of the month, in Oita, sunrise is at 06:07 and sunset at 17:59 JST.

How many hours of sunshine does Oita have in September?

The average sunshine duration in September in Oita, Japan, is 8.7h.

What is the UV index intensity in September in Oita?

In September, the average daily maximum UV index in Oita, Japan, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Oita, Japan

Average temperature in September - Oita, Japan
  • Average high temperature in September: 25.8°C

The warmest month (with the highest average high temperature) is August (30°C).
The month with the lowest average high temperature is January (8.9°C).

  • Average low temperature in September: 19.7°C

The month with the highest average low temperature is August (23.4°C).
The coldest month (with the lowest average low temperature) is January (3°C).

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Average pressure in September
Oita, Japan

Average pressure in September - Oita, Japan
  • Average pressure in September: 1012.2mbar

The month with the highest atmospheric pressure is January (1021.5mbar).
The month with the lowest atmospheric pressure is June (1008.4mbar).

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Average wind speed in September
Oita, Japan

Average wind speed in September - Oita, Japan
  • Average wind speed in September: 8.2km/h

The windiest month (with the highest average wind speed) is January (12.4km/h).
The calmest months (with the lowest average wind speed) are June and July (7.2km/h).

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Average humidity in September
Oita, Japan

Average humidity in September - Oita, Japan
  • Average humidity in September: 82%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is March (72%).

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Average rainfall in September
Oita, Japan

Average rainfall in September - Oita, Japan
  • Average rainfall in September: 73mm

The wettest month (with the highest rainfall) is July (93mm).
The driest months (with the least rainfall) are January and November (21mm).

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Average rainfall days in September
Oita, Japan

Average rainfall days in September - Oita, Japan
  • Average rainfall days in September: 14.9 days

The month with the highest number of rainy days is July (20.7 days).
The month with the least rainy days is January (7.3 days).

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Average snowfall in September
Oita, Japan

Average snowfall in September - Oita, Japan
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (2mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

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Average snowfall days in September
Oita, Japan

Average snowfall days in September - Oita, Japan
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (2.5 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average sea temperature in September
Oita, Japan

Average sea temperature in September - Oita, Japan
  • Average sea temperature in September: 26°C

The best month for swimming (with the highest average sea temperature) is August (26.9°C).
The coldest month (with the lowest average sea temperature) is February (13.5°C).

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Average daylight in September /
Average sunshine in September
Oita, Japan

Average daylight in September / Average sunshine in September - Oita, Japan
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).

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Average sunshine days in September
Oita, Japan

Average sunshine days in September - Oita, Japan
  • Average sunshine days in September: 12.7 days

The month with the most sunshine days is January (20.4 days).
The month with the least sunshine days is July (7.8 days).

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Average UV index in September
Oita, Japan

Average UV index in September - Oita, 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).

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Average cloud cover in September
Oita, Japan

Average cloud cover in September - Oita, Japan
  • Average cloud cover in September: 39

The month with the most cloud cover is June (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in September
Oita, Japan

Average visibility in September - Oita, 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 June and July (8km).

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Oita, Japan

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