September weather forecastOnahama, Japan
September
Weather in September
The first month of the autumn, September, is still a warm month in Onahama, Japan, with temperature in the range of an average low of 19.8°C (67.6°F) and an average high of 24°C (75.2°F).Temperature
A moderate decline in average high-temperatures is noted in September, moving from a warm 27.2°C (81°F) in August to a still moderately hot 24°C (75.2°F). Onahama's nights throughout September are marked by an average low temperature of 19.8°C (67.6°F), a minor drop from the day's high.Humidity
The average relative humidity in September is 80%.Rainfall
In Onahama, in September, during 14.8 rainfall days, 101mm (3.98") of precipitation is typically accumulated. In Onahama, during the entire year, the rain falls for 149.2 days and collects up to 755mm (29.72") of precipitation.Snowfall
April through October and December are months without snowfall.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 05:07 and sunset at 18:05. On the last day of September, sunrise is at 05:30 and sunset at 17:21 JST.
Sunshine
In September, the average sunshine is 7.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 5 translates into these guidelines:
Undertake precautions - Guarding against sun damage is counselled. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. 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
Onahama, Japan
- Average high temperature in September: 24°C
The warmest month (with the highest average high temperature) is August (27.2°C).
The month with the lowest average high temperature is January (6.7°C).
- Average low temperature in September: 19.8°C
The month with the highest average low temperature is August (22.7°C).
The coldest month (with the lowest average low temperature) is January (1.3°C).
Average pressure in September
Onahama, Japan
- Average pressure in September: 1013.8mbar
The month with the highest atmospheric pressure is November (1018.4mbar).
The month with the lowest atmospheric pressure is June (1009.4mbar).
Average wind speed in September
Onahama, Japan
- Average wind speed in September: 13.3km/h
The windiest month (with the highest average wind speed) is January (19.8km/h).
The calmest month (with the lowest average wind speed) is July (11.6km/h).
Average humidity in September
Onahama, Japan
- Average humidity in September: 80%
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is January (65%).
Average rainfall in September
Onahama, Japan
- Average rainfall in September: 101mm
The wettest month (with the highest rainfall) is October (105mm).
The driest month (with the least rainfall) is January (27mm).
Average rainfall days in September
Onahama, Japan
- Average rainfall days in September: 14.8 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (5.5 days).
Average snowfall in September
Onahama, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (20mm).
The months with the least snowfall are April, May, June, July, August, September, October and December (0mm).
Average snowfall days in September
Onahama, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Onahama, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 7h and 30min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is November (Average sunshine: 5h and 42min).
Average sunshine days in September
Onahama, Japan
- Average sunshine days in September: 12.8 days
The month with the most sunshine days is January (24.4 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in September
Onahama, 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 and February (UV index 2).
Average cloud cover in September
Onahama, Japan
- Average cloud cover in September: 42
The month with the most cloud cover is July (Cloud cover 47).
The month with the least cloud cover is January (Cloud cover 32).
Average visibility in September
Onahama, 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).
