The highest day temperature in September 2025 was 92°F. The lowest night temperature was 82°F. The average values for day and night temperatures during September were 89.3°F и 83.7°F respectivly.

The average sea surface temperature in September 2025 for Taichung  was 89.9°F. The maximum and minimum values were 87.6°F and 92.0°F respectively.

Most of the days in September are sunny but you can also expect cloudy and gloomy days.

Precipitation total in September for Taichung  is 2.7 in.

The average wind speed in September is 10.5 mph. It makes September one of the most windless months of the year for Taichung .

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 Taichung  in September is 8.5 hours.