September weather forecastKusai, Japan

September

Weather in September

September, the first month of the autumn in Kusai, is also a moderately hot month, with an average temperature fluctuating between 18.3°C (64.9°F) and 27°C (80.6°F).

Temperature

September marks a gentle change in average high-temperature, declining from August's hot 31.9°C (89.4°F) to a moderately hot 27°C (80.6°F). Nighttime temperature in Kusai experiences an average drop to a refreshing 18.3°C (64.9°F) in September.

Heat index

For most parts of September, the heat index is estimated at 29°C (84.2°F). One might feel worn out with persistent exposure and activity, resulting in heat cramps.
In reference to the heat index, it's for places in shade and with a slight wind. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', melds the effects of warmth and moisture to generate a feeling of heat. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.

Humidity

In September, the average relative humidity is 77%.

Rainfall

In Kusai, in September, during 14.4 rainfall days, 113mm (4.45") of precipitation is typically accumulated. Throughout the year, in Kusai, there are 181.5 rainfall days, and 1229mm (48.39") of precipitation is accumulated.

Snowfall

April through November are months without snowfall in Kusai.

Daylight

The average length of the day in September in Kusai is 12h and 25min.
On the first day of September in Kusai, sunrise is at 05:24 and sunset at 18:19. On the last day of the month, sunrise is at 05:46 and sunset at 17:38 JST.

Sunshine

In Kusai, Japan, the average sunshine in September is 8.8h.

UV index

In Kusai, Japan, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The UV index of 5 during September translates into the following guidance:
Take precautions - Protection against sunburn is recommended. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Always opt for UVA and UVB-resistant sunglasses on radiant days.

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

Frequently asked questions

The high-temperature in Kusai, Japan, during September is 27°C (80.6°F) and the low-temperature is 18.3°C (64.9°F). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in September is estimated at 29°C (84.2°F).

The average relative humidity in September in Kusai is 77%.

In Kusai, in September, it is raining for 14.4 days, with typically 113mm (4.45") of accumulated precipitation.

In Kusai, snow does not fall in April through November.

In September, the average day length in Kusai is 12h and 25min.

On the first day of September in Kusai, Japan, sunrise is at 05:24 and sunset at 18:19. On the last day of the month, sunrise is at 05:46 and sunset at 17:38 JST.

In September, the average sunshine duration in Kusai is 8.8h.

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

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

Aug

September

Oct

Average high temperature

31.9°C

27°C

21.4°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7.1km/h

6.8km/h

7.6km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

12.7

13.9

15.4

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Kusai, Japan

Average high temperature in September: 27°C

The warmest month (with the highest average high temperature) is August (31.9°C).
The month with the lowest average high temperature is January (6.2°C).

Average low temperature in September: 18.3°C

The month with the highest average low temperature is August (22.8°C).
The coldest month (with the lowest average low temperature) is January (-0.8°C).

Average pressure in September
Kusai, Japan

Average pressure in September: 1013.3mbar

The month with the highest atmospheric pressure is November (1019.3mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).

Average wind speed in September
Kusai, Japan

Average wind speed in September: 6.4km/h

The windiest months (with the highest average wind speed) are March and April (8km/h).
The calmest month (with the lowest average wind speed) is July (6km/h).

Average humidity in September
Kusai, Japan

Average humidity in September: 77%

The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is May (70%).

Average rainfall in September
Kusai, Japan

Average rainfall in September: 113mm

The wettest month (with the highest rainfall) is July (208mm).
The driest month (with the least rainfall) is January (47mm).

Average rainfall days in September
Kusai, Japan

Average rainfall days in September: 14.4 days

The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (12.1 days).

Average snowfall in September
Kusai, Japan

Average snowfall in September: 0mm

The month with the highest snowfall is January (82mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

Average snowfall days in September
Kusai, Japan

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (8.2 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
Kusai, Japan

Average daylight in September: 12h and 24min

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 48min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).

Average sunshine days in September
Kusai, Japan

Average sunshine days in September: 13.9 days

The month with the most sunshine days is May (15.7 days).
The month with the least sunshine days is December (9.1 days).

Average UV index in September
Kusai, 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
Kusai, Japan

Average cloud cover in September: 38

The month with the most cloud cover is July (Cloud cover 48).
The month with the least cloud cover is November (Cloud cover 33).

Average visibility in September
Kusai, Japan

Average visibility in September: 8km

The months with the highest visibility are January, February, March, April, May, August, October, November and December (9km).
The months with the lowest visibility are June, July and September (8km).