September weather forecast
Tatsugo, Japan

September

Weather in September

The first month of the autumn, September, is still a warm month in Tatsugo, Japan, with an average temperature fluctuating between 28.3°C (82.9°F) and 27.5°C (81.5°F).

Temperature

With September's arrival, Tatsugo notes an average high-temperature of a still moderately hot 28.3°C (82.9°F), closely following the trend of the preceding month. Tatsugo experiences a steady nighttime temperature of 27.5°C (81.5°F) throughout the month of September.

Heat index

In September, the heat index is computed to be a tropical 32°C (89.6°F). Long-standing exposure and activity could induce a feeling of tiredness and lead to heat cramps.
In the scope of the heat index, its values resonate with shade and light wind conditions. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.

Humidity

In Tatsugo, the average relative humidity in September is 77%.

Rainfall

In Tatsugo, in September, it is raining for 19.7 days, with typically 109mm (4.29") of accumulated precipitation. Throughout the year, there are 222.2 rainfall days, and 1321mm (52.01") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 20min.
On the first day of September in Tatsugo, Japan, sunrise is at 05:59 and sunset at 18:43. On the last day of the month, sunrise is at 06:14 and sunset at 18:08 JST.

Sunshine

The average sunshine in September is 8.2h.

UV index

The months with the highest UV index are June through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Shun overexposure. Protection from sun ravages is indispensable. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.

Frequently asked questions

How hot is September in Tatsugo?
In Tatsugo, 28.3°C (82.9°F) is the average high-temperature and 27.5°C (81.5°F) is the average low-temperature during September. In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines air temperature and relative humidity, is computed to be 32°C (89.6°F).
What is the average humidity in September in Tatsugo?
The average relative humidity in September is 77%.
How much does it rain in September?
In Tatsugo, during September, the rain falls for 19.7 days and regularly aggregates up to 109mm (4.29") of precipitation.
What is the average length of the day in September?
In Tatsugo, the average day length in September is 12h and 20min.
When is the sunrise / sunset in September?
On the first day of September, sunrise is at 05:59 and sunset at 18:43. On the last day of the month, sunrise is at 06:14 and sunset at 18:08 JST.
How many hours of sunshine does Tatsugo have in September?
In September, the average sunshine duration in Tatsugo is 8.2h.
When is the highest UV index?
The months with the highest UV index are June through September, with an average maximum UV index of 7.
What is the UV index intensity in September?
The average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September - Tatsugo, Japan
Average temperature in September
Tatsugo, Japan
  • Average high temperature in September: 28.3°C

The warmest month (with the highest average high temperature) is August (29.1°C).
The month with the lowest average high temperature is January (17.1°C).

  • Average low temperature in September: 27.5°C

The month with the highest average low temperature is August (28.2°C).
The coldest month (with the lowest average low temperature) is January (15.1°C).

Average pressure in September - Tatsugo, Japan
Average pressure in September
Tatsugo, Japan
  • Average pressure in September: 1009.8mbar

The month with the highest atmospheric pressure is January (1020.9mbar).
The month with the lowest atmospheric pressure is August (1007.4mbar).

Average wind speed in September - Tatsugo, Japan
Average wind speed in September
Tatsugo, Japan
  • Average wind speed in September: 22.8km/h

The windiest months (with the highest average wind speed) are January and December (27.8km/h).
The calmest month (with the lowest average wind speed) is May (20.8km/h).

Average humidity in September - Tatsugo, Japan
Average humidity in September
Tatsugo, Japan
  • Average humidity in September: 77%

The month with the highest relative humidity is June (85%).
The months with the lowest relative humidity are January and December (70%).

Average rainfall in September - Tatsugo, Japan
Average rainfall in September
Tatsugo, Japan
  • Average rainfall in September: 109mm

The wettest month (with the highest rainfall) is June (270mm).
The driest month (with the least rainfall) is January (66mm).

Average rainfall days in September - Tatsugo, Japan
Average rainfall days in September
Tatsugo, Japan
  • Average rainfall days in September: 19.7 days

The month with the highest number of rainy days is June (21.9 days).
The month with the least rainy days is April (15.8 days).

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

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in September: 8h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

Average sunshine days in September - Tatsugo, Japan
Average sunshine days in September
Tatsugo, Japan
  • Average sunshine days in September: 7.6 days

The month with the most sunshine days is July (12.8 days).
The month with the least sunshine days is February (6.3 days).

Average UV index in September - Tatsugo, Japan
Average UV index in September
Tatsugo, Japan
  • Average UV index in September: 7

The months with the highest UV index are June, July, August and September (UV index 7).
The months with the lowest UV index are January, February and December (UV index 4).

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

The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is July (Cloud cover 36).

Average visibility in September - Tatsugo, Japan
Average visibility in September
Tatsugo, Japan
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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