Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's onset brings a slight change in high-temperatures, falling from a tropical 31.8°C (89.2°F) in August to a warm 26.6°C (79.9°F). In Koga, September is marked by an average low-temperature of 19.6°C (67.3°F).Humidity
The average relative humidity in September in Koga is 74%.Rainfall
In Koga, in September, it is raining for 17.1 days, with typically 101mm (3.98") of accumulated precipitation. In Koga, during the entire year, the rain falls for 165.6 days and collects up to 838mm (32.99") of precipitation.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day in Koga is 12h and 25min.On the first day of September in Koga, sunrise is at 05:12 and sunset at 18:09. On the last day of the month, sunrise is at 05:35 and sunset at 17:26 JST.
Sunshine
The average sunshine in September is 7.9h.UV index
In September, the average daily maximum UV index in Koga is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 5 in September translates into this advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Koga?
What is the average humidity in September in Koga?
How much does it rain in Koga in September?
When it does not snow in Koga?
How many hours of daylight does Koga have in September?
What time are sunrise and sunset in September in Koga?
How many hours of sunshine does Koga have in September?
How high is the UV index in September in Koga?
Average temperature in September
Koga, Japan
- Average high temperature in September: 26.6°C
The warmest month (with the highest average high temperature) is August (31.8°C).
The month with the lowest average high temperature is January (7.6°C).
- Average low temperature in September: 19.6°C
The month with the highest average low temperature is August (23.8°C).
The coldest month (with the lowest average low temperature) is January (0.8°C).
Average pressure in September
Koga, 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 (1009.3mbar).
Average wind speed in September
Koga, Japan
- Average wind speed in September: 8.1km/h
The windiest month (with the highest average wind speed) is April (10.2km/h).
The calmest month (with the lowest average wind speed) is November (7.6km/h).
Average humidity in September
Koga, 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 (60%).
Average rainfall in September
Koga, Japan
- Average rainfall in September: 101mm
The wettest month (with the highest rainfall) is October (120mm).
The driest month (with the least rainfall) is December (27mm).
Average rainfall days in September
Koga, Japan
- Average rainfall days in September: 17.1 days
The month with the highest number of rainy days is July (22.1 days).
The month with the least rainy days is January (5.6 days).
Average snowfall in September
Koga, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (38mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Koga, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.3 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
Koga, Japan
- Average daylight in September: 12h and 2min
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 5min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The months with the least sunshine are February and November (Average sunshine: 6h and 12min).
Average sunshine days in September
Koga, Japan
- Average sunshine days in September: 9.9 days
The month with the most sunshine days is January (23.8 days).
The month with the least sunshine days is July (5.8 days).
Average UV index in September
Koga, Japan
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Koga, Japan
- Average cloud cover in September: 41
The month with the most cloud cover is June (Cloud cover 46).
The month with the least cloud cover is January (Cloud cover 25).
Average visibility in September
Koga, 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).
Koga, Japan
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