Tainan features a tropical monsoon climate with hot, humid, and rainy summers and warm, dry winters. Summer highs reach 32–34°C, while winter lows rarely fall below 15°C. Rain falls mainly from May to September, peaking in summer, while sunshine is most abundant from October to April. Typhoons can affect the city from July to September.
The best times to travel section shows how the months compare for a visit, so you can find the time of year that fits what you want to do.
Background colours of the months:
The colour shows the typical temperature: yellow (hot), green (mild) and blue (cold). How strong the colour is shows the travel season: full colour means high season, soft colour means shoulder season and soft-striped means off season.
Weather symbols:
Each month has one symbol showing what the weather is typically like, such as hot and sunny, freezing or a rainy or snowy season. Use them to quickly spot months that match the weather you want, or to avoid the ones that don't.
Crowdedness:
The people icon shows how busy the place usually is. The more people, the more crowded it gets.
Additional notes:
The grey info boxes point out special things worth knowing, like recurring weather issues or seasonal events.
Tainan, located in southern Taiwan, enjoys a tropical monsoon climate with mild seasonal variation. Summers (May–September) are hot, humid, and very wet, with average highs of 32–34°C and lows around 26°C. Rainfall is heaviest from June to September, with August being the wettest month (up to 440–557 mm and 17–26 rainy days). Typhoons occasionally bring intense downpours and strong winds, especially from July to September. Humidity is high, often above 75%, and the air can feel oppressive. Despite the rain, sunshine is still plentiful, with 6–8 hours per day in summer, and the sea is warm for swimming year-round (up to 29°C in July and August).
Winters (December–February) are warm, dry, and comfortable, with average highs of 22–25°C and lows of 13–16°C. Rain is rare, and humidity drops, making this season ideal for exploring the city. Spring (March–April) and autumn (October–November) are transitional, with mild to warm temperatures (22–29°C), moderate rainfall, and blooming or colourful landscapes. The dry season from November to April offers the best weather for outdoor activities, with clear skies and pleasant evenings. Tainan receives about 1,700–2,400 mm of rain annually and enjoys over 2,200 hours of sunshine per year. Winds are generally light, though can increase during typhoons and summer storms.
| Average climate data for Tainan, Taiwan | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | 23 | 24 | 26 | 29 | 31 | 32 | 33 | 33 | 32 | 31 | 28 | 24 | 33 |
| Average minimum temperature (°C) | 14 | 15 | 17 | 21 | 24 | 26 | 26 | 26 | 25 | 23 | 20 | 16 | 14 |
| Average precipitation (mm) | 17 | 28 | 39 | 80 | 171 | 372 | 359 | 393 | 179 | 28 | 17 | 15 | 1,697 |
| Average rainfall days (days) | 4 | 5 | 5 | 7 | 9 | 13 | 12 | 15 | 10 | 2 | 2 | 3 | 87 |
| Average relative humidity (%) | 78 | 78 | 76 | 78 | 80 | 77 | 78 | 79 | 79 | 76 | 76 | 76 | 77 |
| Average water temperature (°C) | 23 | 24 | 24 | 26 | 27 | 28 | 29 | 29 | 29 | 28 | 27 | 25 | 27 |
| Average daily daylight hours (h) | 10 | 11 | 12 | 12 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 10 | 12 |
| Average daily sunshine hours (h) | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 6 |
| Average UV index | 7 | 9 | 11 | 12 | 12 | 12 | 12 | 12 | 11 | 9 | 7 | 6 | 10 |
The best time to visit Tainan is from November to April, during the dry season. These months offer warm, comfortable temperatures (22–28°C), low humidity, and minimal rain – ideal for sightseeing, festivals, and outdoor activities. Skies are clear, evenings are pleasant, and the risk of typhoons is low, making it perfect for travel.
The least favourable time to visit is from June to September, when the monsoon brings heavy rain, high humidity, and frequent thunderstorms. Typhoons may disrupt travel plans, and outdoor activities can be uncomfortable due to the heat and wet weather. However, this is the greenest time of year, with lush landscapes and fewer tourists.
Tainan has hot, humid, and rainy summers (highs 32–34°C) and warm, dry winters (highs 22–25°C, lows 13–16°C). Most rain falls from May to September, while October to April is sunnier and drier.
The rainy season runs from May to September, with the heaviest rainfall and highest humidity in June, July, and August. Typhoons can also bring intense rain and wind from July to September.
Yes, typhoons can affect Tainan from July to September. They bring heavy rain, strong winds, and sometimes travel disruptions. Always check weather forecasts during this period.
Summer temperatures in Tainan regularly reach 32–34°C, with high humidity making it feel hotter. Winters are much milder, with daytime highs of 22–25°C and comfortable evenings.
Yes, the sea is warm enough for swimming year-round, peaking at 29°C in summer. The best months for beach activities are May to November, though summer rain and typhoons can affect plans.
Pack light, breathable clothes and sun protection for summer, an umbrella or rain jacket for the wet season, and a jumper for cooler winter evenings. Comfortable shoes are useful year-round.
Crowds are smallest during the wet summer months (June–September) and in early spring. Winter and late autumn are more popular, especially around festivals and holidays.
The warmest month, with the highest average maximum temperature, is July (32.9 °C). The month with the lowest average maximum temperature is January (22.8 °C). Overall, the average maximum temperature over the whole year is 28.8 °C.
The month with the highest average minimum temperature is July (26.3 °C). The coldest month, with the lowest average minimum temperature, is January (14.2 °C). Overall, the average minimum temperature over the whole year is 21.1 °C.
The month with the highest average water temperature is August (29.1 °C). The month with the lowest average water temperature is January (23.2 °C). Overall, the average water temperature over the whole year is 26.6 °C.
The wettest month, with the highest amount of precipitation, is August (392.5 mm). The driest month, with the least amount of precipitation, is December (14.5 mm). Over the whole year there are 1,696.8 mm of rainfall on average.
The month with the most days of rain is August (15.3 days). The month with the fewest days of rain is November (2.3 days). Over the whole year there are 87.3 days of rain on average.
The month with the highest average relative humidity is May (79.6 %). The month with the lowest average relative humidity is November (75.6 %). The overall average relative humidity over the whole year is 77.5 %.
The month with the longest days, so the most daylight, is June (Average daylight: 13 h). The months with the shortest days, so the least daylight, are January and December (Average daylight: 10.1 h). Over the whole year there are 11.7 h of daylight per day on average.
The month with the most sunshine per day is July (Average sunshine: 6.2 h). The month with the least sunshine per day is April (Average sunshine: 5 h). Over the whole year there are 5.6 h of sunlight per day on average.
The months with the highest average UV index are April, May, June, July and August (UV index: 12). The month with the lowest average UV index is December (UV index: 6). Over the whole year the average UV index is 10.
