September weather forecastOchikawa, Japan
September
Weather in September
The first month of the autumn, September, is still a warm month in Ochikawa, Japan, with an average temperature ranging between min 21.2°C (70.2°F) and max 27.2°C (81°F).Temperature
In September, the average high-temperature marginally decreases from a hot 31.5°C (88.7°F) in August to a moderately hot 27.2°C (81°F). Throughout September, the average low-temperature in Ochikawa records at an agreeable 21.2°C (70.2°F).Heat index
September's average heat index is estimated at 29°C (84.2°F). Fatigue might occur with continuous exposure and activity, potentially causing heat cramps.It is essential to grasp that the heat index's numbers are for shade and light wind settings. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. 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. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Humidity
In September, the average relative humidity in Ochikawa is 72%.Rainfall
In September, the rain falls for 11.4 days. Throughout September, 42mm (1.65") of precipitation is accumulated. Throughout the year, in Ochikawa, there are 113.9 rainfall days, and 334mm (13.15") of precipitation is accumulated.Snowfall
In Ochikawa, snow does not fall in April through December.Daylight
In September, the average length of the day is 12h and 25min.On the first day of September, sunrise is at 05:14 and sunset at 18:10. On the last day of the month, sunrise is at 05:36 and sunset at 17:27 JST.
Sunshine
In September, the average sunshine is 8h.UV index
In Ochikawa, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: In September, an average UV index of 5 transforms into the following instructions:
Make use of precautions - It is urged to ward off sun damage. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ochikawa, Japan
- Average high temperature in September: 27.2°C
The warmest month (with the highest average high temperature) is August (31.5°C).
The month with the lowest average high temperature is January (8.8°C).
- Average low temperature in September: 21.2°C
The month with the highest average low temperature is August (25.2°C).
The coldest month (with the lowest average low temperature) is January (2.5°C).
Average pressure in September
Ochikawa, Japan
- Average pressure in September: 1013.5mbar
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
Ochikawa, Japan
- Average wind speed in September: 11.6km/h
The windiest month (with the highest average wind speed) is April (14.2km/h).
The calmest month (with the lowest average wind speed) is November (11.2km/h).
Average humidity in September
Ochikawa, Japan
- Average humidity in September: 72%
The month with the highest relative humidity is July (75%).
The month with the lowest relative humidity is January (58%).
Average rainfall in September
Ochikawa, Japan
- Average rainfall in September: 42mm
The wettest month (with the highest rainfall) is October (45mm).
The driest month (with the least rainfall) is February (9mm).
Average rainfall days in September
Ochikawa, Japan
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is July (14.6 days).
The month with the least rainy days is December (4.1 days).
Average snowfall in September
Ochikawa, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (5mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Ochikawa, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 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
Ochikawa, Japan
- Average daylight in September: 12h and 24min
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: 8h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 6h and 0min).
Average sunshine days in September
Ochikawa, Japan
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is December (25.3 days).
The month with the least sunshine days is June (13.7 days).
Average UV index in September
Ochikawa, Japan
- Average UV index in September: 5
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
Ochikawa, Japan
- Average cloud cover in September: 39
The months with the most cloud cover are June and October (Cloud cover 43).
The month with the least cloud cover is January (Cloud cover 27).
Average visibility in September
Ochikawa, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
