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 advent of September brings a slight shift in average high-temperature, moving from a moderately hot 28.5°C (83.3°F) in August to a still warm 24.9°C (76.8°F). The nights of September anticipate a slight dip from daytime high temperatures, settling to an average low-temperature of 20.1°C (68.2°F).Humidity
The average relative humidity in September in Atami is 81%.Rainfall
In Atami, in September, during 16.5 rainfall days, 141mm (5.55") of precipitation is typically accumulated. In Atami, during the entire year, the rain falls for 174.9 days and collects up to 1233mm (48.54") of precipitation.Snowfall
In Atami, Japan, snow does not fall in March through December.Sea temperature
In September, the average sea temperature in Atami is 25.8°C (78.4°F).Note: In any water activity, temperatures between 25°C (77°F) and 29°C (84.2°F) are viewed as magnificent and exceptionally pleasant for prolonged enjoyment.
Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 05:16 and sunset at 18:10. On the last day of September, sunrise is at 05:37 and sunset at 17:29 JST.
Sunshine
In Atami, Japan, the average sunshine in September is 8h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 5 suggests this advice:
Take precautions - Protection against sunburn is recommended. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Caution! Sand and water reflections can notably increase the UV radiation intensity.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Atami?
What is the average humidity in September in Atami?
How many days does it rain in September in Atami?
When it does not snow in Atami?
What is the sea water temperature in September in Atami?
What is the average length of the day in September in Atami?
When are sunrise and sunset in September in Atami?
How many hours of sunshine does Atami have in September?
What is the UV index intensity in September in Atami?
Average temperature in September
Atami, Japan
- Average high temperature in September: 24.9°C
The warmest month (with the highest average high temperature) is August (28.5°C).
The month with the lowest average high temperature is January (8.3°C).
- Average low temperature in September: 20.1°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 (2.8°C).
Average pressure in September
Atami, Japan
- Average pressure in September: 1013.2mbar
The month with the highest atmospheric pressure is November (1018.1mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).
Average wind speed in September
Atami, Japan
- Average wind speed in September: 12.5km/h
The windiest month (with the highest average wind speed) is March (15.2km/h).
The calmest month (with the lowest average wind speed) is August (11.7km/h).
Average humidity in September
Atami, Japan
- Average humidity in September: 81%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is January (67%).
Average rainfall in September
Atami, Japan
- Average rainfall in September: 141mm
The wettest month (with the highest rainfall) is July (165mm).
The driest month (with the least rainfall) is January (52mm).
Average rainfall days in September
Atami, Japan
- Average rainfall days in September: 16.5 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in September
Atami, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (28mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Atami, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.2 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
Atami, Japan
- Average sea temperature in September: 25.8°C
The best month for swimming (with the highest average sea temperature) is August (26.2°C).
The coldest month (with the lowest average sea temperature) is February (15.3°C).
Average daylight in September /
Average sunshine in September
Atami, 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: 8h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in September
Atami, Japan
- Average sunshine days in September: 9.9 days
The month with the most sunshine days is January (19.9 days).
The month with the least sunshine days is July (8.5 days).
Average UV index in September
Atami, 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 February (UV index 2).
Average cloud cover in September
Atami, Japan
- Average cloud cover in September: 42
The month with the most cloud cover is June (Cloud cover 48).
The month with the least cloud cover is January (Cloud cover 29).
Average visibility in September
Atami, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, August, October, November and December (10km).
The months with the lowest visibility are April, May, June, July and September (9km).
