September weather forecastOtsuki, Japan
September
Weather in September
The first month of the autumn, September, is still a warm month in Otsuki, Japan, with an average temperature ranging between max 23.3°C (73.9°F) and min 15.1°C (59.2°F).Temperature
With the onset of September, Otsuki's average high-temperature slightly adjusts, moderately receding from August's warm 27.3°C (81.1°F) to a still moderately hot 23.3°C (73.9°F). September nights observe an average temperature dip to a moderate 15.1°C (59.2°F).Humidity
In September, the average relative humidity is 84%.Rainfall
In Otsuki, Japan, in September, it is raining for 21.1 days, with typically 138mm (5.43") of accumulated precipitation. Throughout the year, there are 209 rainfall days, and 1496mm (58.9") of precipitation is accumulated.Snowfall
In Otsuki, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 25min.On the first day of the month, sunrise is at 05:16 and sunset at 18:11. On the last day of September, in Otsuki, sunrise is at 05:38 and sunset at 17:29 JST.
Sunshine
The average sunshine in September is 7.8h.UV index
In September, the average daily maximum UV index in Otsuki is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Around midday, solar radiation is most harmful; hence, exposure should be limited. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Otsuki, Japan
- Average high temperature in September: 23.3°C
The warmest month (with the highest average high temperature) is August (27.3°C).
The month with the lowest average high temperature is January (4.6°C).
- Average low temperature in September: 15.1°C
The month with the highest average low temperature is August (18.8°C).
The coldest month (with the lowest average low temperature) is January (-4.3°C).
Average pressure in September
Otsuki, Japan
- Average pressure in September: 1013.5mbar
The month with the highest atmospheric pressure is November (1018.4mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in September
Otsuki, Japan
- Average wind speed in September: 7km/h
The windiest months (with the highest average wind speed) are March and April (8.6km/h).
The calmest month (with the lowest average wind speed) is August (6.6km/h).
Average humidity in September
Otsuki, Japan
- Average humidity in September: 84%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is January (70%).
Average rainfall in September
Otsuki, Japan
- Average rainfall in September: 138mm
The wettest month (with the highest rainfall) is October (219mm).
The driest month (with the least rainfall) is January (54mm).
Average rainfall days in September
Otsuki, Japan
- Average rainfall days in September: 21.1 days
The month with the highest number of rainy days is August (25.3 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in September
Otsuki, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is March (284mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Otsuki, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Otsuki, 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 48min
The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).
Average sunshine days in September
Otsuki, Japan
- Average sunshine days in September: 6.7 days
The month with the most sunshine days is January (15.1 days).
The month with the least sunshine days is August (3.2 days).
Average UV index in September
Otsuki, Japan
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Otsuki, Japan
- Average cloud cover in September: 48
The month with the most cloud cover is June (Cloud cover 53).
The month with the least cloud cover is January (Cloud cover 28).
Average visibility in September
Otsuki, Japan
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, November and December (9km).
The months with the lowest visibility are May, June, July, August, September and October (8km).
