August weather forecastRoppongi, Japan
August
Weather in August
August, the last month of the summer in Roppongi, is a hot month, with temperature in the range of an average low of 24.9°C (76.8°F) and an average high of 30.6°C (87.1°F).Temperature
August brings the highest temperatures, with an average high of 30.6°C (87.1°F) and an average low of 24.9°C (76.8°F).Heat index
The heat index value during August is evaluated at a fiery hot 38°C (100.4°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.In the scope of the heat index, its values resonate with shade and light wind conditions. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. 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.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.
Humidity
The average relative humidity in August in Roppongi, Japan, is 75%.Rainfall
In Roppongi, Japan, during August, the rain falls for 13.7 days and regularly aggregates up to 37mm (1.46") of precipitation. Throughout the year, there are 125.3 rainfall days, and 359mm (14.13") of precipitation is accumulated.Snowfall
March through December are months without snowfall.Daylight
In August, the average length of the day is 13h and 29min.On the first day of the month, sunrise is at 04:49 and sunset at 18:45. On the last day of August, sunrise is at 05:12 and sunset at 18:10 JST.
Sunshine
The month with the most sunshine in Roppongi is August, with an average of 10.3h of sunshine.UV index
In Roppongi, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In August, a daily maximum UV index of 6 leads to the following instructions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Roppongi, Japan
- Average high temperature in August: 30.6°C
The warmest month (with the highest average high temperature) is August (30.6°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 (3°C).
Average pressure in August
Roppongi, Japan
- Average pressure in August: 1010.2mbar
The month with the highest atmospheric pressure is November (1018.1mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in August
Roppongi, Japan
- Average wind speed in August: 12.7km/h
The windiest month (with the highest average wind speed) is April (15.6km/h).
The calmest month (with the lowest average wind speed) is November (12.3km/h).
Average humidity in August
Roppongi, Japan
- Average humidity in August: 75%
The month with the highest relative humidity is July (79%).
The month with the lowest relative humidity is January (60%).
Average rainfall in August
Roppongi, Japan
- Average rainfall in August: 37mm
The wettest month (with the highest rainfall) is September (54mm).
The driest month (with the least rainfall) is February (10mm).
Average rainfall days in August
Roppongi, Japan
- Average rainfall days in August: 13.7 days
The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in August
Roppongi, Japan
- Average snowfall in August: 0mm
The month with the highest snowfall is February (4mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in August
Roppongi, Japan
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in August /
Average sunshine in August
Roppongi, Japan
- Average daylight in August: 13h and 30min
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 August: 10h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days in August
Roppongi, Japan
- Average sunshine days in August: 14.3 days
The month with the most sunshine days is January (25.4 days).
The month with the least sunshine days is June (11.5 days).
Average UV index in August
Roppongi, Japan
- Average UV index in August: 6
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in August
Roppongi, Japan
- Average cloud cover in August: 34
The months with the most cloud cover are June and October (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 28).
Average visibility in August
Roppongi, Japan
- Average visibility in August: 10km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
