August weather forecast
Shimonoseki, Japan

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Weather in August

August, the last month of the summer in Shimonoseki, is also a moderately hot month, with temperature in the range of an average high of 29.7°C (85.5°F) and an average low of 24.9°C (76.8°F).

Temperature

Shimonoseki experiences its highest average temperatures in August, reaching a peak of 29.7°C (85.5°F) and a minimum of 24.9°C (76.8°F).

Heat index

August's mean heat index is evaluated at a fiery hot 36°C (96.8°F). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

In August, the average relative humidity is 79%.

Rainfall

In Shimonoseki, in August, it is raining for 17 days, with typically 120mm (4.72") of accumulated precipitation. Throughout the year, there are 176.5 rainfall days, and 1039mm (40.91") of precipitation is accumulated.

Snowfall

In Shimonoseki, snow does not fall in March through November.

Sea temperature

August is the month with the warmest seawater, with an average sea temperature of 27.4°C (81.3°F).
Note: Water temperatures in the range of 25°C (77°F) to 29°C (84.2°F) are warm and delightful, ensuring comfort during water activities over extended periods.

Daylight

In Shimonoseki, the average length of the day in August is 13h and 24min.
On the first day of August in Shimonoseki, sunrise is at 05:27 and sunset at 19:17. On the last day of the month, sunrise is at 05:49 and sunset at 18:43 JST.

Sunshine

With an average of 10.7h of sunshine, August has the most sunshine of the year in Shimonoseki.

UV index

In August, the average daily maximum UV index in Shimonoseki is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: In August, the maximum UV index of 6 translates into these guidelines:
Stay clear of intense sun exposure. Solar protection is of utmost significance. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be mindful! Sand and water reflections can up the Sun's UV exposure.
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Frequently asked questions

What is the warmest month in Shimonoseki?

The highest temperatures in Shimonoseki are recorded in August, with averages reaching a high of 29.7°C (85.5°F) and a low of 24.9°C (76.8°F).

How hot is August in Shimonoseki?

The average high-temperature, in August, in Shimonoseki, is 29.7°C (85.5°F), while the average low-temperature is 24.9°C (76.8°F). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, is evaluated at 36°C (96.8°F).

What is the average humidity in August in Shimonoseki?

In Shimonoseki, the average relative humidity in August is 79%.

How many days does it rain in August in Shimonoseki?

In Shimonoseki, Japan, in August, during 17 rainfall days, 120mm (4.72") of precipitation is typically accumulated.

When it does not snow in Shimonoseki?

In Shimonoseki, Japan, snow does not fall in March through November.

What is the month with the warmest sea water in Shimonoseki?

The month with the warmest seawater in Shimonoseki is August, with an average sea temperature of 27.4°C (81.3°F).

How warm is the water in August in Shimonoseki?

In August, the average sea temperature in Shimonoseki, Japan, is 27.4°C (81.3°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in August in Shimonoseki?

In Shimonoseki, Japan, the average day length in August is 13h and 24min.

What time are sunrise and sunset in August in Shimonoseki?

On the first day of August in Shimonoseki, Japan, sunrise is at 05:27 and sunset at 19:17. On the last day of the month, sunrise is at 05:49 and sunset at 18:43 JST.

What month has the most sunshine in Shimonoseki?

The month with the most sunshine in Shimonoseki is August, with an average of 10.7h of sunshine.

How long on average sun shines in August in Shimonoseki?

In Shimonoseki, Japan, the average sunshine duration in August is 10.7h.

How high is the UV index in August in Shimonoseki?

The average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unprotected exposure to 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 temperature in August
Shimonoseki, Japan

Average temperature in August - Shimonoseki, Japan
  • Average high temperature in August: 29.7°C

The warmest month (with the highest average high temperature) is August (29.7°C).
The month with the lowest average high temperature is January (8.8°C).

  • Average low temperature in August: 24.9°C

The month with the highest average low temperature is August (24.9°C).
The coldest month (with the lowest average low temperature) is January (5.3°C).

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Average pressure in August
Shimonoseki, Japan

Average pressure in August - Shimonoseki, Japan
  • Average pressure in August: 1008.7mbar

The month with the highest atmospheric pressure is January (1021.9mbar).
The month with the lowest atmospheric pressure is June (1008.3mbar).

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Average wind speed in August
Shimonoseki, Japan

Average wind speed in August - Shimonoseki, Japan
  • Average wind speed in August: 12km/h

The windiest month (with the highest average wind speed) is December (17.6km/h).
The calmest month (with the lowest average wind speed) is June (10.8km/h).

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Average humidity in August
Shimonoseki, Japan

Average humidity in August - Shimonoseki, Japan
  • Average humidity in August: 79%

The month with the highest relative humidity is July (85%).
The months with the lowest relative humidity are January, February and March (69%).

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Average rainfall in August
Shimonoseki, Japan

Average rainfall in August - Shimonoseki, Japan
  • Average rainfall in August: 120mm

The wettest month (with the highest rainfall) is July (209mm).
The driest month (with the least rainfall) is January (44mm).

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Average rainfall days in August
Shimonoseki, Japan

Average rainfall days in August - Shimonoseki, Japan
  • Average rainfall days in August: 17 days

The month with the highest number of rainy days is July (20.7 days).
The month with the least rainy days is May (10.7 days).

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Average snowfall in August
Shimonoseki, Japan

Average snowfall in August - Shimonoseki, Japan
  • Average snowfall in August: 0mm

The month with the highest snowfall is January (11mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).

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Average snowfall days in August
Shimonoseki, Japan

Average snowfall days in August - Shimonoseki, Japan
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (3.3 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 August
Shimonoseki, Japan

Average sea temperature in August - Shimonoseki, Japan
  • Average sea temperature in August: 27.4°C

The best month for swimming (with the highest average sea temperature) is August (27.4°C).
The coldest month (with the lowest average sea temperature) is March (13.8°C).

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Average daylight in August /
Average sunshine in August
Shimonoseki, Japan

Average daylight in August / Average sunshine in August - Shimonoseki, Japan
  • Average daylight in August: 13h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in August: 10h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

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Average sunshine days in August
Shimonoseki, Japan

Average sunshine days in August - Shimonoseki, Japan
  • Average sunshine days in August: 11.3 days

The month with the most sunshine days is May (18.8 days).
The month with the least sunshine days is July (7.3 days).

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Average UV index in August
Shimonoseki, Japan

Average UV index in August - Shimonoseki, Japan
  • Average UV index in August: 6

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 August
Shimonoseki, Japan

Average cloud cover in August - Shimonoseki, Japan
  • Average cloud cover in August: 31

The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in August
Shimonoseki, Japan

Average visibility in August - Shimonoseki, Japan
  • Average visibility in August: 10km

The months with the highest visibility are February, March, April, August, September, October, November and December (10km).
The months with the lowest visibility are January, May, June and July (9km).

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Shimonoseki, Japan

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