September weather forecastRikubetsu, Japan

September

Weather in September

September, the first month of the autumn in Rikubetsu, is also an agreeable month, with an average temperature fluctuating between 11°C (51.8°F) and 20.3°C (68.5°F).

Temperature

The advent of September brings a subtle shift in temperature, with the average high moving from a warm 23.9°C (75°F) in August to a pleasant 20.3°C (68.5°F). The average temperature in Rikubetsu drops to a cool 11°C (51.8°F) during the night in the month of September.

Humidity

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

Rainfall

In Rikubetsu, during September, the rain falls for 16.3 days and regularly aggregates up to 70mm (2.76") of precipitation. Throughout the year, there are 163 rainfall days, and 723mm (28.46") of precipitation is accumulated.

Snowfall

In Rikubetsu, snow does not fall in June through September.

Daylight

In September, the average length of the day is 12h and 31min.
On the first day of the month, sunrise is at 04:49 and sunset at 18:00. On the last day of September, in Rikubetsu, sunrise is at 05:21 and sunset at 17:08 JST.

Sunshine

In September, the average sunshine in Rikubetsu is 7.4h.

UV index

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In September, the maximum UV index of 4 suggests these recommendations:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Enhance your sun protection with tightly woven, yet airy clothing.

Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

September temperatures in Rikubetsu, Japan, vary between a high-temperature of 20.3°C (68.5°F) and a low-temperature of 11°C (51.8°F).

The average relative humidity in September in Rikubetsu, Japan, is 82%.

In Rikubetsu, Japan, in September, during 16.3 rainfall days, 70mm (2.76") of precipitation is typically accumulated.

In Rikubetsu, Japan, snow does not fall in June through September.

In Rikubetsu, Japan, in September, it doesn't snow. In October, it regularly snows.

In Rikubetsu, Japan, the average day length in September is 12h and 31min.

In September, on the first day of the month, sunrise is at 04:49 and sunset at 18:00. On the last day of the month, sunrise is at 05:21 and sunset at 17:08 JST.

In September, the average sunshine duration is 7.4h.

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

23.9°C

20.3°C

13°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7.9km/h

9.1km/h

10.5km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

7.3

11.3

13.3

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Rikubetsu, Japan

Average high temperature in September: 20.3°C

The warmest month (with the highest average high temperature) is August (23.9°C).
The month with the lowest average high temperature is January (-4.8°C).

Average low temperature in September: 11°C

The month with the highest average low temperature is August (14.6°C).
The coldest month (with the lowest average low temperature) is February (-12.3°C).

Average pressure in September
Rikubetsu, Japan

Average pressure in September: 1013.9mbar

The month with the highest atmospheric pressure is October (1015.4mbar).
The month with the lowest atmospheric pressure is July (1009.1mbar).

Average wind speed in September
Rikubetsu, Japan

Average wind speed in September: 8.2km/h

The windiest month (with the highest average wind speed) is April (10.1km/h).
The calmest month (with the lowest average wind speed) is August (7km/h).

Average humidity in September
Rikubetsu, Japan

Average humidity in September: 82%

The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is May (76%).

Average rainfall in September
Rikubetsu, Japan

Average rainfall in September: 70mm

The wettest month (with the highest rainfall) is August (111mm).
The driest month (with the least rainfall) is February (35mm).

Average rainfall days in September
Rikubetsu, Japan

Average rainfall days in September: 16.3 days

The month with the highest number of rainy days is July (20 days).
The month with the least rainy days is February (6.4 days).

Average snowfall in September
Rikubetsu, Japan

Average snowfall in September: 0mm

The month with the highest snowfall is January (310mm).
The months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in September
Rikubetsu, Japan

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (23.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September: 12h and 30min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

Average sunshine in September: 7h and 24min

The month with the most sunshine is May (Average sunshine: 8h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 12min).