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
The transition to September results in a modest reduction in average high-temperature, moving from a hot 31.9°C (89.4°F) in August to a warm 27.5°C (81.5°F). In Niikura, September is marked by an average low-temperature of 20.9°C (69.6°F).Heat index
Throughout September, the heat index is estimated at a hot 30°C (86°F). Persistent activity under exposure might lead to a feeling of weariness, with subsequent heat cramps.Remember that heat index calculations are made for conditions in the shade with light wind. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', represents the fusion of temperature and moisture in the air to suggest how warm it feels. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
The average relative humidity in September in Niikura is 73%.Rainfall
In Niikura, in September, it is raining for 14 days, with typically 74mm (2.91") of accumulated precipitation. Throughout the year, there are 138 rainfall days, and 580mm (22.83") of precipitation is accumulated.Snowfall
In Niikura, snow does not fall in April through October and December.Daylight
In Niikura, the average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 05:13 and sunset at 18:09. On the last day of the month, sunrise is at 05:35 and sunset at 17:27 JST.
Sunshine
The average sunshine in September is 7.8h.UV index
In Niikura, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 6 during September translates into the following directions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Frequently asked questions
What is the usual temperature for Niikura in September?
What is the average humidity in September in Niikura?
How many days does it rain in September in Niikura?
When it does not snow in Niikura?
How many hours of daylight does Niikura have in September?
What time are sunrise and sunset in September in Niikura?
How long on average sun shines in September in Niikura?
What is the UV index intensity in September in Niikura?
Average temperature in September
Niikura, Japan
- Average high temperature in September: 27.5°C
The warmest month (with the highest average high temperature) is August (31.9°C).
The month with the lowest average high temperature is January (8.5°C).
- Average low temperature in September: 20.9°C
The month with the highest average low temperature is August (24.9°C).
The coldest month (with the lowest average low temperature) is January (2°C).
Average pressure in September
Niikura, Japan
- Average pressure in September: 1013.6mbar
The month with the highest atmospheric pressure is November (1018.2mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in September
Niikura, Japan
- Average wind speed in September: 10km/h
The windiest month (with the highest average wind speed) is April (12.6km/h).
The calmest month (with the lowest average wind speed) is November (9.7km/h).
Average humidity in September
Niikura, Japan
- Average humidity in September: 73%
The month with the highest relative humidity is July (75%).
The month with the lowest relative humidity is January (59%).
Average rainfall in September
Niikura, Japan
- Average rainfall in September: 74mm
The wettest month (with the highest rainfall) is October (79mm).
The driest month (with the least rainfall) is December (19mm).
Average rainfall days in September
Niikura, Japan
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is June (15.7 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in September
Niikura, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (33mm).
The months with the least snowfall are April, May, June, July, August, September, October and December (0mm).
Average snowfall days in September
Niikura, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and December (0 days).
Average daylight in September /
Average sunshine in September
Niikura, Japan
- Average daylight in September: 12h and 2min
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 5min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 0min).
Average sunshine days in September
Niikura, Japan
- Average sunshine days in September: 12.6 days
The month with the most sunshine days is January (26 days).
The month with the least sunshine days is June (11.9 days).
Average UV index in September
Niikura, Japan
- Average UV index in September: 6
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Niikura, Japan
- Average cloud cover in September: 41
The months with the most cloud cover are June and October (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 26).
Average visibility in September
Niikura, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, August, October, November and December (10km).
The months with the lowest visibility are June, July and September (9km).
Niikura, Japan
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