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
Weather in September
Temperature
The beginning of September in Ulsan subtly marks a decrease in the average high-temperature, transitioning from 28°C (82.4°F) in August to a still warm 23.8°C (74.8°F). In Ulsan, the average low-temperature during September nights tends to settle at a comfortable 19.2°C (66.6°F), indicating a slight drop from the daytime peak.Humidity
In Ulsan, South Korea, the average relative humidity in September is 78%.Rainfall
In Ulsan, during September, the rain falls for 13.2 days and regularly aggregates up to 124mm (4.88") of precipitation. Throughout the year, in Ulsan, there are 129.7 rainfall days, and 902mm (35.51") of precipitation is accumulated.Snowfall
In Ulsan, snow does not fall in April through November.Sea temperature
In Ulsan, in September, the average water temperature is 24.1°C (75.4°F).Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 24.1°C (75.4°F) water may be enjoyable. (FYI: The official water temperature required for the Olympic swimming competition is 25°C (77°F) to 28°C (82.4°F).)
Daylight
In Ulsan, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 05:55 and sunset at 18:50. On the last day of September, sunrise is at 06:16 and sunset at 18:08 KST.
Sunshine
In Ulsan, the average sunshine in September is 7.5h.UV index
In September, the average daily maximum UV index in Ulsan is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Enhance your sun protection with tightly woven, yet airy clothing. Take heed! Reflections of sand and water make the Sun's UV rays stronger.
Frequently asked questions
What is the temperature in September in Ulsan?
What is the average humidity in September in Ulsan?
How much does it rain in Ulsan in September?
When it does not snow in Ulsan?
What is the water temperature in September in Ulsan?
What is the average length of the day in September in Ulsan?
When is the sunrise / sunset in September in Ulsan?
How long on average sun shines in September in Ulsan?
What is the UV index intensity in September in Ulsan?
Average temperature in September
Ulsan, South Korea
- Average high temperature in September: 23.8°C
The warmest month (with the highest average high temperature) is August (28°C).
The month with the lowest average high temperature is January (4.8°C).
- Average low temperature in September: 19.2°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 (-1.3°C).
Average pressure in September
Ulsan, South Korea
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is January (1023.1mbar).
The month with the lowest atmospheric pressure is July (1007.6mbar).
Average wind speed in September
Ulsan, South Korea
- Average wind speed in September: 14.7km/h
The windiest months (with the highest average wind speed) are January and December (17.1km/h).
The calmest month (with the lowest average wind speed) is June (11.5km/h).
Average humidity in September
Ulsan, South Korea
- Average humidity in September: 78%
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is January (60%).
Average rainfall in September
Ulsan, South Korea
- Average rainfall in September: 124mm
The wettest month (with the highest rainfall) is July (180mm).
The driest month (with the least rainfall) is November (28mm).
Average rainfall days in September
Ulsan, South Korea
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in September
Ulsan, South Korea
- Average snowfall in September: 0mm
The month with the highest snowfall is February (13mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Ulsan, South Korea
- 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 November (0 days).
Average sea temperature in September
Ulsan, South Korea
- Average sea temperature in September: 24.1°C
The best month for swimming (with the highest average sea temperature) is August (25.6°C).
The coldest month (with the lowest average sea temperature) is March (12.3°C).
Average daylight in September /
Average sunshine in September
Ulsan, South Korea
- 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 3min
The month with the most sunshine is May (Average sunshine: 9h and 36min).
The month with the least sunshine is November (Average sunshine: 6h and 0min).
Average sunshine days in September
Ulsan, South Korea
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is January (24.8 days).
The month with the least sunshine days is July (8.7 days).
Average UV index in September
Ulsan, South Korea
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Ulsan, South Korea
- Average cloud cover in September: 42
The month with the most cloud cover is July (Cloud cover 46).
The month with the least cloud cover is December (Cloud cover 25).
Average visibility in September
Ulsan, South Korea
- 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).
Ulsan, South Korea
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