August weather forecast
Yokohama, Japan

Plunging into the depth of summer, August continues the warm trend seen in July, but temperatures reach their peak now with highs of 29.8°C (85.6°F). High humidity persists in Yokohama, though the frequency of rainfalls sees a notable drop as compared to the previous months. The wind speed also reduces slightly, giving a sense of calmness to the summer heat. With the sea at its warmest, locals and visitors alike savour this opportunity to flock to the beautiful beaches of Yokohama. Clear skies are interspersed with cloud cover making a stunning canvas for breathtaking evening views.

Temperature

In Yokohama, August is the warmest month, with temperatures averaging a high of 29.8°C (85.6°F) and a low of 25.3°C (77.5°F).

Heat index

During August, the heat index is calculated to be a very hot 36°C (96.8°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', evaluates the perceived heat by adding the effect of moisture in the air. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In Yokohama, Japan, the average relative humidity in August is 76%.

Rainfall

In Yokohama, Japan, in August, it is raining for 13.3 days, with typically 56mm (2.2") of accumulated precipitation. In Yokohama, during the entire year, the rain falls for 160.5 days and collects up to 884mm (34.8") of precipitation.

Snowfall

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

Sea temperature

With an average sea temperature of 26.2°C (79.2°F), August is the month with the warmest seawater.
Note: Water temperature from 25°C (77°F) to 29°C (84.2°F) is considered very warm, making water activities enjoyable for prolonged periods without any uncomfortable sensations.

Daylight

In August, the average length of the day in Yokohama, Japan, is 13h and 28min.
On the first day of August, sunrise is at 04:50 and sunset at 18:45. On the last day of the month, sunrise is at 05:13 and sunset at 18:10 JST.

Sunshine

The month with the most sunshine in Yokohama, Japan, is August, with an average of 10.5h of sunshine.

UV index

In August, the average daily maximum UV index in Yokohama, Japan, is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high UV index of 6 in August translates into the following recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Watch out! Sand and water enhance the UV exposure you receive.