September weather forecast
Taiwan

September in Taiwan marks the transition from the hot summer months to the cooler autumn period. The northern regions, including Taipei, experience temperatures between 24°C (75.2°F) and 33°C (91.4°F). The monsoon season's residual influence results in noticeable rainfall, with average monthly precipitation around 150mm (5.91"). The frequency of sunny periods increases, offering warmer and drier days interspersed with showers.

In central and southern Taiwan, temperatures generally vary from 26°C (78.8°F) to 33°C (91.4°F). Cities like Kaohsiung and Tainan continue to be warmer, often reaching the upper limit of this temperature range. Rainfall in these regions decreases, aligning with the overall reduction in monsoon activity. However, the continuing typhoon season can still bring bouts of severe weather, especially in the southern part of the island.

When compared to August, September experiences a decrease in both temperature and rainfall as the summer heat starts to recede and the influence of the monsoon continues to diminish. As the island transitions into October, the following month, Taiwan further experiences cooler temperatures and decreased rainfall, truly embracing the arrival of the autumn season. The typhoon season, however, can extend into October, potentially affecting the overall weather conditions.

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• Taipei - September »
  The month with the most rainfall in Taipei is September, when the rain falls for 13.8 days and typically aggregates up to 361mm (14.21") of precipitation. The arrival of September in Taipei brings an average high-temperature of a still hot 31.1°C (88°F), closely following the temperature pattern of August.
• Taichung - September »
  With the decrease in rainfall and a mild reduction in temperatures, September sets the perfect stage for those seeking to explore Taichung's outdoor scenic views. In Taichung in September, it is raining for 8.2 days, with typically 98mm (3.86") of accumulated precipitation.
• Tainan - September »
  Tainan's nights in September experience an average temperature drop to a warm 25.3°C (77.5°F). In Tainan, in September, during 9.5 rainfall days, 178mm (7.01") of precipitation is typically accumulated.
• Penghu - September »
  The months with the warmest seawater in Penghu are July through September, with an average sea temperature of 28°C (82.4°F). On the last day of September, in Penghu, sunrise is at 05:53 and sunset at 17:50 CST.
• Sun Moon Lake - September »
  On the first day of September in Sun Moon Lake sunrise is at 05:38 and sunset at 18:14. On the first day of September in Sun Moon Lake sunrise is at 05:38 and sunset at 18:14.
• Kaohsiung City - September »
  In Kaohsiung City in September, during 11.2 rainfall days, 242mm (9.53") of precipitation is typically accumulated. In September, the average relative humidity in Kaohsiung City is 78.9%.
• Alishan Township - September »
  In Alishan Township, in September, during 18 rainfall days, 233mm (9.17") of precipitation is typically accumulated. On the first day of September in Alishan Township, sunrise is at 05:38 and sunset at 18:14.
• Hualien County - September »
  In Hualien County in September, during 17 rainfall days, 344mm (13.54") of precipitation is typically accumulated. How many days does it rain in September in Hualien County?
• Orchid Island - September »
  June through September, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater in Orchid Island, Taiwan. June through September, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater in Orchid Island, Taiwan.
• Hsinchu City - September »
  In Hsinchu City in September, during 6.8 rainfall days, 95mm (3.74") of precipitation is typically accumulated. In Hsinchu City in September, during 6.8 rainfall days, 95mm (3.74") of precipitation is typically accumulated.
• Taitung City - September »
  In Taitung City in September, during 13.7 rainfall days, 299mm (11.77") of precipitation is typically accumulated. In Taitung City, in September, the average water temperature is 28.5°C (83.3°F).