September weather forecastHeda, Japan
September
Weather in September
September, the first month of the autumn in Heda, is also a moderately hot month, with temperature in the range of an average high of 25.2°C (77.4°F) and an average low of 19.6°C (67.3°F).Temperature
The advent of September brings a subtle shift in temperature, with the average high moving from a warm 28.7°C (83.7°F) in August to a still moderately hot 25.2°C (77.4°F). An average low-temperature of 19.6°C (67.3°F) is observed during the September nights.Humidity
In Heda, the average relative humidity in September is 81%.Rainfall
In Heda, in September, during 18.2 rainfall days, 145mm (5.71") of precipitation is typically accumulated. Throughout the year, in Heda, there are 189.9 rainfall days, and 1352mm (53.23") of precipitation is accumulated.Snowfall
In Heda, snow does not fall in March through November.Sea temperature
In Heda, the average seawater temperature in September is 25.7°C (78.3°F).Note: For swimming, diving, and enjoying other water activities, the range of 25°C (77°F) to 29°C (84.2°F) in water temperature is considered ideal, offering pleasure for extended periods without discomfort.
Daylight
In September, the average length of the day is 12h and 25min.On the first day of the month, sunrise is at 05:17 and sunset at 18:11. On the last day of September, in Heda, sunrise is at 05:38 and sunset at 17:30 JST.
Sunshine
In September, the average sunshine is 8.5h.UV index
In Heda, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index of 5 during September leads to these instructions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Stay alert! Reflective properties of sand and water amplify the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Heda, Japan
- Average high temperature in September: 25.2°C
The warmest month (with the highest average high temperature) is August (28.7°C).
The month with the lowest average high temperature is January (8.2°C).
- Average low temperature in September: 19.6°C
The month with the highest average low temperature is August (22.8°C).
The coldest month (with the lowest average low temperature) is January (2°C).
Average pressure in September
Heda, Japan
- Average pressure in September: 1013.2mbar
The month with the highest atmospheric pressure is November (1018.2mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).
Average wind speed in September
Heda, Japan
- Average wind speed in September: 10.7km/h
The windiest month (with the highest average wind speed) is March (13.2km/h).
The calmest month (with the lowest average wind speed) is August (10.2km/h).
Average humidity in September
Heda, Japan
- Average humidity in September: 81%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is January (67%).
Average rainfall in September
Heda, Japan
- Average rainfall in September: 145mm
The wettest month (with the highest rainfall) is July (202mm).
The driest month (with the least rainfall) is January (50mm).
Average rainfall days in September
Heda, Japan
- Average rainfall days in September: 18.2 days
The month with the highest number of rainy days is July (21.9 days).
The month with the least rainy days is January (8.7 days).
Average snowfall in September
Heda, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (2mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Heda, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.7 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
Heda, Japan
- Average sea temperature in September: 25.7°C
The best month for swimming (with the highest average sea temperature) is August (26.3°C).
The coldest month (with the lowest average sea temperature) is February (15.3°C).
Average daylight in September /
Average sunshine in September
Heda, 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 54min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in September
Heda, Japan
- Average sunshine days in September: 8 days
The month with the most sunshine days is January (18.9 days).
The month with the least sunshine days is July (4.3 days).
Average UV index in September
Heda, Japan
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Heda, Japan
- Average cloud cover in September: 38
The month with the most cloud cover is June (Cloud cover 45).
The month with the least cloud cover is January (Cloud cover 24).
Average visibility in September
Heda, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, October, November and December (10km).
The months with the lowest visibility are April, May, June, July, August and September (9km).
