September weather forecastYoshikawa, Japan
September
Weather in September
September, the first month of the autumn in Yoshikawa, is still a warm month, with an average temperature varying between 27.2°C (81°F) and 20.6°C (69.1°F).Temperature
With the onset of September, Yoshikawa experiences a modest temperature adjustment, with the average high-temperature gently receding from a hot 31.9°C (89.4°F) in August to a moderately hot 27.2°C (81°F). Yoshikawa's nighttime temperature in September drops to an average of 20.6°C (69.1°F).Heat index
In September, the heat index is calculated to be a hot 30°C (86°F). Persisting in activity during long-term exposure might induce weariness, with subsequent heat cramps.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Humidity
In Yoshikawa, the average relative humidity in September is 74%.Rainfall
In Yoshikawa, during September, the rain falls for 17.3 days and regularly aggregates up to 107mm (4.21") of precipitation. Throughout the year, in Yoshikawa, there are 167.3 rainfall days, and 870mm (34.25") of precipitation is accumulated.Snowfall
In Yoshikawa, Japan, snow does not fall in April through December.Daylight
In Yoshikawa, the average length of the day in September is 12h and 25min.On the first day of September in Yoshikawa, sunrise is at 05:12 and sunset at 18:08. On the last day of the month, sunrise is at 05:34 and sunset at 17:26 JST.
Sunshine
The average sunshine in September in Yoshikawa, Japan, is 7.7h.UV index
In September, the average daily maximum UV index in Yoshikawa, Japan, is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 6 suggests this advice:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Yoshikawa, Japan
- Average high temperature in September: 27.2°C
The warmest month (with the highest average high temperature) is August (31.9°C).
The month with the lowest average high temperature is January (8.4°C).
- Average low temperature in September: 20.6°C
The month with the highest average low temperature is August (24.6°C).
The coldest month (with the lowest average low temperature) is January (1.8°C).
Average pressure in September
Yoshikawa, Japan
- Average pressure in September: 1013.6mbar
The month with the highest atmospheric pressure is November (1018.2mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in September
Yoshikawa, Japan
- Average wind speed in September: 10.1km/h
The windiest month (with the highest average wind speed) is April (12.6km/h).
The calmest month (with the lowest average wind speed) is November (9.5km/h).
Average humidity in September
Yoshikawa, Japan
- Average humidity in September: 74%
The month with the highest relative humidity is July (76%).
The month with the lowest relative humidity is January (59%).
Average rainfall in September
Yoshikawa, Japan
- Average rainfall in September: 107mm
The wettest month (with the highest rainfall) is October (121mm).
The driest month (with the least rainfall) is December (33mm).
Average rainfall days in September
Yoshikawa, Japan
- Average rainfall days in September: 17.3 days
The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is January (7.2 days).
Average snowfall in September
Yoshikawa, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (30mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Yoshikawa, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.4 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
Yoshikawa, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 7h and 42min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in September
Yoshikawa, Japan
- Average sunshine days in September: 10.4 days
The month with the most sunshine days is January (22.1 days).
The months with the least sunshine days are June and July (9.2 days).
Average UV index in September
Yoshikawa, Japan
- Average UV index in September: 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 September
Yoshikawa, Japan
- Average cloud cover in September: 42
The month with the most cloud cover is June (Cloud cover 46).
The month with the least cloud cover is January (Cloud cover 27).
Average visibility in September
Yoshikawa, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, November and December (10km).
The months with the lowest visibility are April, May, June, July, August, September and October (9km).
