September weather forecastMinamata, Japan
September
Weather in September
The first month of the autumn, September, is still a warm month in Minamata, Japan, with an average temperature fluctuating between 22.7°C (72.9°F) and 27.1°C (80.8°F).Temperature
The transition into September marks the average high-temperature at a still moderately hot 27.1°C (80.8°F), differing minimally from August's 29.4°C (84.9°F). Minamata, in the month of September, notes an average low temperature of 22.7°C (72.9°F), indicating a small decrease from the daytime highs.Heat index
The heat index value during September is estimated at a hot 30°C (86°F). Continuing activity during long-lasting exposure might induce tiredness and result in heat cramps.Heat index values are typically calculated for conditions of shade and a light breeze. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a value derived by merging air temperature with the humidity to convey how the climate feels. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
In Minamata, the average relative humidity in September is 79%.Rainfall
In Minamata, Japan, during September, the rain falls for 17.5 days and regularly aggregates up to 93mm (3.66") of precipitation. Throughout the year, there are 190.1 rainfall days, and 1194mm (47.01") of precipitation is accumulated.Snowfall
In Minamata, snow does not fall in March through December.Sea temperature
In Minamata, in September, the average water temperature is 27.2°C (81°F).Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) are ideal for swimming, diving, and similar water activities, ensuring pleasure and comfort for extended periods without feeling uneasy.
Daylight
In Minamata, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 05:53 and sunset at 18:43. On the last day of September, sunrise is at 06:11 and sunset at 18:04 JST.
Sunshine
The average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a daily UV index of 6 turns into the following recommendations:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. 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. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Notice! The Sun's UV exposure elevates with sand and water reflections.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Minamata, Japan
- Average high temperature in September: 27.1°C
The warmest month (with the highest average high temperature) is August (29.4°C).
The month with the lowest average high temperature is January (10.8°C).
- Average low temperature in September: 22.7°C
The month with the highest average low temperature is August (25.3°C).
The coldest month (with the lowest average low temperature) is January (6.8°C).
Average pressure in September
Minamata, Japan
- Average pressure in September: 1011.4mbar
The month with the highest atmospheric pressure is January (1021.7mbar).
The month with the lowest atmospheric pressure is June (1008mbar).
Average wind speed in September
Minamata, Japan
- Average wind speed in September: 12.7km/h
The windiest month (with the highest average wind speed) is December (19.8km/h).
The calmest month (with the lowest average wind speed) is June (11.2km/h).
Average humidity in September
Minamata, Japan
- Average humidity in September: 79%
The month with the highest relative humidity is July (87%).
The month with the lowest relative humidity is March (72%).
Average rainfall in September
Minamata, Japan
- Average rainfall in September: 93mm
The wettest month (with the highest rainfall) is June (261mm).
The driest month (with the least rainfall) is January (44mm).
Average rainfall days in September
Minamata, Japan
- Average rainfall days in September: 17.5 days
The month with the highest number of rainy days is July (22.2 days).
The month with the least rainy days is October (11.2 days).
Average snowfall in September
Minamata, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (3mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Minamata, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.1 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature in September
Minamata, Japan
- Average sea temperature in September: 27.2°C
The best month for swimming (with the highest average sea temperature) is August (27.9°C).
The coldest month (with the lowest average sea temperature) is March (16.2°C).
Average daylight in September /
Average sunshine in September
Minamata, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 8h and 24min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Minamata, Japan
- Average sunshine days in September: 10.5 days
The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is July (7.5 days).
Average UV index in September
Minamata, Japan
- Average UV index in September: 6
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Minamata, Japan
- Average cloud cover in September: 38
The month with the most cloud cover is June (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Minamata, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, August, September, October, November and December (10km).
The months with the lowest visibility are May, June and July (9km).
