August weather forecast
Okayama, Japan

August, the peak summer month, ushers in the highest temperatures of the year in Okayama racing to 32.7°C (90.9°F). The humidity drops slightly from July to 69%, providing a minor relief from the otherwise sticky conditions. Rainfall exhibits a sharp decline to 87mm (3.43"), making it the driest month of the year. Despite the intensity of the outdoor conditions, the city hustles and bustles with various summer outdoor activities. Staying hydrated and protected from the intense heat becomes imperative during this time in Okayama.

Temperature

August is the month when Okayama's temperatures reach their peak, with averages of 32.7°C (90.9°F) and lows of 24.7°C (76.5°F).

Heat index

August's average heat index is estimated at a blistering 42°C (107.6°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', evaluates the perceived heat by adding the effect of moisture in the air. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

In Okayama, the average relative humidity in August is 69%.

Rainfall

In Okayama, in August, it is raining for 13 days, with typically 87mm (3.43") of accumulated precipitation. In Okayama, during the entire year, the rain falls for 189 days and collects up to 1106mm (43.54") of precipitation.

Snowfall

In Okayama, snow does not fall in April through December.

Sea temperature

August is the month with the warmest seawater, with an average sea temperature of 27.2°C (81°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 August, the average length of the day is 13h and 26min.
On the first day of August, sunrise is at 05:14 and sunset at 19:06. On the last day of the month, sunrise is at 05:36 and sunset at 18:32 JST.

Sunshine

August has the most sunshine of the year in Okayama, with an average of 6.7h of sunshine.

UV index

The average daily maximum UV index in August is 10. A UV Index estimate of 8 to 10 represents a very high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In August, an average UV index of 10 transforms into the following instructions:
Take special precautions, as unprotected skin can be damaged and can burn quickly. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Even when it's cloudy, ensure the generous application and frequent reapplication of a sunscreen with at least 30 SPF, particularly post swim or outdoor activity. Be careful! The Sun's UV radiation is accentuated by reflecting off sand and water.