September weather forecastShimoigusa, Japan
September
Weather in September
September, the first month of the autumn in Shimoigusa, is still a warm month, with an average temperature varying between 27°C (80.6°F) and 21.5°C (70.7°F).Temperature
The move into September indicates a slight reduction in the average high-temperature, down from August's tropical 31°C (87.8°F) to a moderately hot 27°C (80.6°F). An average low-temperature of 21.5°C (70.7°F) is recorded during the nights in September.Heat index
The heat index value for September is evaluated at 29°C (84.2°F). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.Know that the heat index computations account for shaded terrains and slight winds. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are especially vital to children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
The average relative humidity in September is 73%.Rainfall
The month with the most rainfall is September, when the rain falls for 13.3 days and typically aggregates up to 54mm (2.13") of precipitation.Snowfall
In Shimoigusa, snow does not fall in April through December.Daylight
In September, the average length of the day in Shimoigusa is 12h and 25min.On the first day of the month, sunrise is at 05:13 and sunset at 18:09. On the last day of September, sunrise is at 05:35 and sunset at 17:27 JST.
Sunshine
In Shimoigusa, the average sunshine in September is 7.9h.UV index
In Shimoigusa, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Ensure safety - Sun damage prevention is strongly urged. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Shimoigusa, Japan
- Average high temperature in September: 27°C
The warmest month (with the highest average high temperature) is August (31°C).
The month with the lowest average high temperature is January (8.9°C).
- Average low temperature in September: 21.5°C
The month with the highest average low temperature is August (25.1°C).
The coldest month (with the lowest average low temperature) is January (2.8°C).
Average pressure in September
Shimoigusa, Japan
- Average pressure in September: 1013.4mbar
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 September
Shimoigusa, Japan
- Average wind speed in September: 12.9km/h
The windiest month (with the highest average wind speed) is April (15.3km/h).
The calmest month (with the lowest average wind speed) is November (12.1km/h).
Average humidity in September
Shimoigusa, Japan
- Average humidity in September: 73%
The month with the highest relative humidity is July (77%).
The month with the lowest relative humidity is January (59%).
Average rainfall in September
Shimoigusa, Japan
- Average rainfall in September: 54mm
The wettest month (with the highest rainfall) is September (54mm).
The driest month (with the least rainfall) is December (21mm).
Average rainfall days in September
Shimoigusa, Japan
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in September
Shimoigusa, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (21mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Shimoigusa, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Shimoigusa, Japan
- Average daylight in September: 12h and 24min
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 September: 7h and 54min
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 48min).
Average sunshine days in September
Shimoigusa, Japan
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is September (14.3 days).
Average UV index in September
Shimoigusa, Japan
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover in September
Shimoigusa, Japan
- Average cloud cover in September: 40
The months with the most cloud cover are June and October (Cloud cover 43).
The month with the least cloud cover is January (Cloud cover 28).
Average visibility in September
Shimoigusa, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
