September weather forecastSaikai, Japan
September
Weather in September
September, the first month of the autumn in Saikai, is still a warm month, with an average temperature varying between 21.7°C (71.1°F) and 26.3°C (79.3°F).Temperature
September is characterized by a slight reduction in average high-temperature, easing from 29.6°C (85.3°F) in August to a still warm 26.3°C (79.3°F). September nights cool to an average low-temperature of 21.7°C (71.1°F), a marginal decrease from its daytime equivalent.Humidity
In Saikai, the average relative humidity in September is 79%.Rainfall
In Saikai, Japan, in September, during 14.8 rainfall days, 80mm (3.15") of precipitation is typically accumulated. In Saikai, during the entire year, the rain falls for 169.5 days and collects up to 913mm (35.94") of precipitation.Snowfall
In Saikai, snow does not fall in March through November.Daylight
The average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 05:56 and sunset at 18:46. On the last day of the month, sunrise is at 06:14 and sunset at 18:07 JST.
Sunshine
In Saikai, the average sunshine in September is 8.1h.UV index
In Saikai, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saikai, Japan
- Average high temperature in September: 26.3°C
The warmest month (with the highest average high temperature) is August (29.6°C).
The month with the lowest average high temperature is January (9.3°C).
- Average low temperature in September: 21.7°C
The month with the highest average low temperature is August (24.8°C).
The coldest month (with the lowest average low temperature) is January (5.4°C).
Average pressure in September
Saikai, Japan
- Average pressure in September: 1011.7mbar
The month with the highest atmospheric pressure is January (1022.2mbar).
The month with the lowest atmospheric pressure is June (1008mbar).
Average wind speed in September
Saikai, Japan
- Average wind speed in September: 13.6km/h
The windiest months (with the highest average wind speed) are January and December (16.7km/h).
The calmest month (with the lowest average wind speed) is June (10.6km/h).
Average humidity in September
Saikai, 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 (71%).
Average rainfall in September
Saikai, Japan
- Average rainfall in September: 80mm
The wettest month (with the highest rainfall) is July (192mm).
The driest month (with the least rainfall) is January (38mm).
Average rainfall days in September
Saikai, Japan
- Average rainfall days in September: 14.8 days
The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is May (9.5 days).
Average snowfall in September
Saikai, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (6mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Saikai, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.6 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
Saikai, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The months with the least sunshine are January and December (Average sunshine: 4h and 30min).
Average sunshine days in September
Saikai, Japan
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is May (20.2 days).
The months with the least sunshine days are July and December (9.5 days).
Average UV index in September
Saikai, 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 December (UV index 2).
Average cloud cover in September
Saikai, Japan
- Average cloud cover in September: 39
The months with the most cloud cover are January and December (Cloud cover 51).
The month with the least cloud cover is October (Cloud cover 33).
Average visibility in September
Saikai, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, September, October, November and December (10km).
The months with the lowest visibility are May, June, July and August (9km).
