Tainan weather in May
In May, Tainan has an average high of 28 °C83 °F and an average low of 25 °C78 °F, with about 223 mm8.8 in of precipitation. It is the 5th warmest month of the year and ranks 5th for precipitation.
How May compares with other months
Compared with April, May is 2.2 °C4 °F warmer on average and wetter by 144 mm5.7 in. Compared with June, May is 1.3 °C2.3 °F cooler on average and drier by 121 mm4.8 in. Daylight lasts about 13.2 hours around the middle of the month. Average relative humidity is 82% and the average cloud amount 66%.
Is May a good time to visit Tainan?
May is not among the most comfortable months by our comfort score: it is hot (average high 28 °C83 °F), it is fairly wet (223 mm8.8 in) and it is humid (82%). The most comfortable months in Tainan are October–April.
What to wear in May
For Tainan in May, pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
May in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Tainan | 2883 | 2578 | 2238.8 |
| Yongkang | 2883 | 2578 | 2238.8 |
| Kaohsiung | 3188 | 2678 | 1827.2 |
| Chiayi City | 3290 | 2475 | 2529.9 |
| Taitung | 3187 | 2578 | 2068.1 |
| Yuanlin | 3087 | 2374 | 25610 |
| Taichung | 3086 | 2374 | 25610 |
| Toufen | 2882 | 2576 | 2198.6 |
| Hsinchu | 2883 | 2373 | 2278.9 |
Nearby places that are more than 1 °C1.8 °F warmer in May: Kaohsiung, Chiayi City and Taitung; cooler: Hsinchu.
Other months in Tainan
- January21 °C70 °F / 18 °C64 °F
- February22 °C72 °F / 18 °C65 °F
- March24 °C75 °F / 20 °C68 °F
- April26 °C79 °F / 23 °C73 °F
- May28 °C83 °F / 25 °C78 °F
- June29 °C84 °F / 27 °C81 °F
- July30 °C86 °F / 28 °C82 °F
- August29 °C85 °F / 28 °C82 °F
- September29 °C84 °F / 27 °C80 °F
- October27 °C81 °F / 25 °C76 °F
- November26 °C78 °F / 23 °C73 °F
- December23 °C73 °F / 19 °C67 °F
Frequently asked questions
How warm is Tainan in May?
In May the average high in Tainan is 28 °C (83 °F) and the average low is 25 °C (78 °F).
Does it rain a lot in Tainan in May?
On average about 223 mm (8.8 in) of precipitation falls in May; it ranks 5th of the 12 months.
Is May the warmest month in Tainan?
No. The warmest month in Tainan is July, with an average high of 30 °C (86 °F). The coldest month is January, with an average low of 18 °C (64 °F).
How long is the day in Tainan in May?
In the middle of May the day in Tainan lasts about 13.2 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Tainan in May?
The average relative humidity in May is about 82%. Combined with warm days, it can feel muggy.
How cloudy is Tainan in May?
On average about 66% of the sky is covered by cloud in May. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.