September weather forecastOtawara, Japan
September
Weather in September
The first month of the autumn, September, is still a warm month in Otawara, Japan, with temperature in the range of an average high of 24.3°C (75.7°F) and an average low of 16.2°C (61.2°F).Temperature
In September, the meteorological conditions change slightly, with the average high-temperature moving from a warm 29°C (84.2°F) in August to a still moderately hot 24.3°C (75.7°F). Throughout September, Otawara's nights cool down to an average of 16.2°C (61.2°F).Humidity
In Otawara, the average relative humidity in September is 81%.Rainfall
In Otawara, during September, the rain falls for 17.5 days and regularly aggregates up to 93mm (3.66") of precipitation. Throughout the year, in Otawara, there are 178.7 rainfall days, and 956mm (37.64") of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In Otawara, Japan, the average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 05:10 and sunset at 18:08. On the last day of the month, sunrise is at 05:34 and sunset at 17:25 JST.
Sunshine
The average sunshine in September in Otawara is 7.7h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Otawara, Japan
- Average high temperature in September: 24.3°C
The warmest month (with the highest average high temperature) is August (29°C).
The month with the lowest average high temperature is January (3.8°C).
- Average low temperature in September: 16.2°C
The month with the highest average low temperature is August (20.3°C).
The coldest month (with the lowest average low temperature) is January (-3.5°C).
Average pressure in September
Otawara, Japan
- Average pressure in September: 1014mbar
The month with the highest atmospheric pressure is November (1018.7mbar).
The month with the lowest atmospheric pressure is June (1009.3mbar).
Average wind speed in September
Otawara, Japan
- Average wind speed in September: 7.2km/h
The windiest months (with the highest average wind speed) are February and March (10.3km/h).
The calmest month (with the lowest average wind speed) is August (6.3km/h).
Average humidity in September
Otawara, Japan
- Average humidity in September: 81%
The month with the highest relative humidity is July (83%).
The months with the lowest relative humidity are January, March, April, May and December (72%).
Average rainfall in September
Otawara, Japan
- Average rainfall in September: 93mm
The wettest month (with the highest rainfall) is July (140mm).
The driest month (with the least rainfall) is December (28mm).
Average rainfall days in September
Otawara, Japan
- Average rainfall days in September: 17.5 days
The month with the highest number of rainy days is July (23.8 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in September
Otawara, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (88mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Otawara, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.8 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
Otawara, 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 42min).
- Average sunshine in September: 7h and 42min
The month with the most sunshine is May (Average sunshine: 9h and 36min).
The month with the least sunshine is February (Average sunshine: 6h and 18min).
Average sunshine days in September
Otawara, Japan
- Average sunshine days in September: 10.9 days
The months with the most sunshine days are January and November (18.8 days).
The month with the least sunshine days is July (4.8 days).
Average UV index in September
Otawara, Japan
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).
Average cloud cover in September
Otawara, Japan
- Average cloud cover in September: 45
The month with the most cloud cover is July (Cloud cover 52).
The month with the least cloud cover is November (Cloud cover 31).
Average visibility in September
Otawara, Japan
- Average visibility in September: 8km
The month with the highest visibility is December (10km).
The months with the lowest visibility are June, July, August and September (8km).
