The highest day temperature in September 2026 was 87°F. The lowest night temperature was 71°F. The average values for day and night temperatures during September were 79.4°F и 76.2°F respectivly.

The average sea surface temperature in September 2026 for Busan was 82.2°F. The maximum and minimum values were 79.4°F and 86.6°F respectively.

You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in September for Busan is 4.5 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 11.4 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Busan in September is 7.0 hours.