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 sea temperature 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
September
Weather in September
Temperature
The arrival of September signals a subtle shift in temperature, down from a warm 29.8°C (85.6°F) in August to a still moderately hot 25.7°C (78.3°F). In Oarai, September nights cool down to an average of 19.8°C (67.6°F).Humidity
In Oarai, Japan, the average relative humidity in September is 78%.Rainfall
In Oarai, in September, it is raining for 15 days, with typically 93mm (3.66") of accumulated precipitation. In Oarai, during the entire year, the rain falls for 163.2 days and collects up to 839mm (33.03") of precipitation.Snowfall
April through November are months without snowfall.Sea temperature
In Oarai, the average seawater temperature in September is 23°C (73.4°F).Note: For those with a heightened sensitivity to cold, sunshine, wind, and outside temperature make a big difference in enjoying a swim at 23°C (73.4°F). (Olympic swimming regulations state a water temperature of 25°C (77°F) to 28°C (82.4°F).)
Daylight
In September, the average length of the day in Oarai is 12h and 25min.On the first day of September in Oarai, sunrise is at 05:09 and sunset at 18:06. On the last day of the month, sunrise is at 05:32 and sunset at 17:23 JST.
Sunshine
In Oarai, the average sunshine in September is 7.5h.UV index
In September, the average daily maximum UV index in Oarai, Japan, is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The UV index of 5 in September translates into these instructions:
Undertake protective steps - Recommendations to avoid sunburn are issued. Around midday, solar radiation is most harmful; hence, exposure should be limited. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Take note! The UV strength of the Sun elevates when reflected off water and sand.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Oarai?
What is the average humidity in September in Oarai?
How many days does it rain in September in Oarai?
When it does not snow in Oarai?
What is the sea temperature in September in Oarai?
How many hours of daylight does Oarai have in September?
What time are sunrise and sunset in September in Oarai?
How many hours of sunshine does Oarai have in September?
What is the UV index intensity in September in Oarai?
Average temperature in September
Oarai, Japan
- Average high temperature in September: 25.7°C
The warmest month (with the highest average high temperature) is August (29.8°C).
The month with the lowest average high temperature is January (7.6°C).
- Average low temperature in September: 19.8°C
The month with the highest average low temperature is August (23.3°C).
The coldest month (with the lowest average low temperature) is January (1.6°C).
Average pressure in September
Oarai, Japan
- Average pressure in September: 1013.7mbar
The month with the highest atmospheric pressure is November (1018.3mbar).
The month with the lowest atmospheric pressure is June (1009.3mbar).
Average wind speed in September
Oarai, Japan
- Average wind speed in September: 11.2km/h
The windiest month (with the highest average wind speed) is February (14.4km/h).
The calmest month (with the lowest average wind speed) is July (9.7km/h).
Average humidity in September
Oarai, Japan
- Average humidity in September: 78%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is January (62%).
Average rainfall in September
Oarai, Japan
- Average rainfall in September: 93mm
The wettest month (with the highest rainfall) is October (121mm).
The driest month (with the least rainfall) is January (34mm).
Average rainfall days in September
Oarai, Japan
- Average rainfall days in September: 15 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in September
Oarai, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (32mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Oarai, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.9 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in September
Oarai, Japan
- Average sea temperature in September: 23°C
The best month for swimming (with the highest average sea temperature) is August (23.6°C).
The coldest month (with the lowest average sea temperature) is February (11.7°C).
Average daylight in September /
Average sunshine in September
Oarai, 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 3min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).
Average sunshine days in September
Oarai, Japan
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in September
Oarai, 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
Oarai, Japan
- Average cloud cover in September: 42
The months with the most cloud cover are June and July (Cloud cover 48).
The month with the least cloud cover is January (Cloud cover 30).
Average visibility in September
Oarai, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, October, November and December (10km).
The months with the lowest visibility are May, June, July, August and September (9km).
