Tainan in Summer
In summer (June, July and August), Tainan sees average daytime highs around 31°C and overnight lows near 26°C, with 1099 mm of rain over about 60 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 31°C. The sky is clear or mostly clear about 12% of the time across summer, and the air most often feels miserable.
Summer is Tainan's weakest season of the year to visit on our travel score. For the whole year in context, see Tainan's year-round climate.
- Avg daytime high
- 31°C
- warmest season of the year
- Avg overnight low
- 26°C
- Rainfall
- 1099 mm
- 60 wet days
- Avg wind
- 9 km/h
- Travel score
- 3.2
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Tainan in Summer
Across summer, daytime highs hold fairly steady around 31°C.
A typical summer day in Tainan reaches about 31°C and drops to 26°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Tainan
Once humidity and wind are folded in, summer brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Tainan weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 22° / 16° | 49 | 7.2 | 10.7 | 7.4 |
| Feb | 23° / 17° | 44 | 7.8 | 11.2 | 7.3 |
| Mar | 25° / 19° | 58 | 9.2 | 11.8 | 7.0 |
| Apr | 28° / 22° | 120 | 11.8 | 12.5 | 5.8 |
| May | 30° / 25° | 299 | 18.7 | 13.1 | 4.0 |
| Jun | 31° / 26° | 393 | 19.7 | 13.4 | 3.2 |
| Jul | 32° / 27° | 305 | 19.1 | 13.3 | 3.2 |
| Aug | 31° / 26° | 401 | 21.1 | 12.8 | 3.2 |
| Sep | 31° / 26° | 184 | 13.6 | 12.1 | 4.1 |
| Oct | 29° / 24° | 54 | 6.4 | 11.5 | 5.9 |
| Nov | 27° / 21° | 41 | 5.7 | 10.9 | 7.3 |
| Dec | 24° / 18° | 47 | 6.4 | 10.6 | 7.7 |
Cloud cover in Summer
The sky is clear or mostly clear about 12% of the time across summer.
Chance of precipitation in Summer
Tainan gets around 1099 mm of rain over 60 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 9 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 18 min in early June to 12 h 30 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.2 kWh/m².
Hazard calendar for Tainan
In summer, Tainan overlaps its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.
Tainan sits in the Pacific typhoon belt; the season peaks July–October.
Tainan's monsoon runs May–September, when most of the year's rain falls.
Is summer a good time to visit Tainan?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Tainan.
What to pack for Tainan in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Tainan sees daytime highs around 31°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 60 days see rain.
Sea temperature near Tainan in Summer
The nearest coast averages about 29°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 16 km away) is warmest in July at about 29°C and coldest in January near 24°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 24 | 24 | 24 | 26 | 28 | 29 | 29 | 29 | 29 | 28 | 26 | 25 |
| Comfort | Refreshing | Refreshing | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 24 | Refreshing |
| Feb | 24 | Refreshing |
| Mar | 24 | Warm |
| Apr | 26 | Warm |
| May | 28 | Warm |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 28 | Warm |
| Nov | 26 | Warm |
| Dec | 25 | Warm |
UV index in Tainan in Summer
Clear-sky midday UV across summer averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Tainan peaks around June 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 6 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 6 | 8 | 10 | 9 | 9 | 12 | 10 | 12 | 11 | 8 | 7 | 6 |
| Level | High | Very high | Very high | Very high | Very high | Extreme | Very high | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 6 | High |
| Feb | 8 | Very high |
| Mar | 10 | Very high |
| Apr | 9 | Very high |
| May | 9 | Very high |
| Jun | 12 | Extreme |
| Jul | 10 | Very high |
| Aug | 12 | Extreme |
| Sep | 11 | Extreme |
| Oct | 8 | Very high |
| Nov | 7 | Very high |
| Dec | 6 | High |
Air quality in Tainan in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Tainan is worst in March — around 48 µg/m³ PM2.5 (poor), about 1.8× the cleanest month (July, 27 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 41 | 44 | 48 | 46 | 38 | 30 | 27 | 29 | 38 | 40 | 40 | 36 |
| Level | Poor | Poor | Poor | Poor | Poor | Moderate | Moderate | Moderate | Poor | Poor | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 41 | Poor |
| Feb | 44 | Poor |
| Mar | 48 | Poor |
| Apr | 46 | Poor |
| May | 38 | Poor |
| Jun | 30 | Moderate |
| Jul | 27 | Moderate |
| Aug | 29 | Moderate |
| Sep | 38 | Poor |
| Oct | 40 | Poor |
| Nov | 40 | Poor |
| Dec | 36 | Poor |
Where is Tainan?
Tainan sits at 23.0°N, 120.2°E, 26 m above sea level, in Taiwan. The nearest listed city is Yongkang, 6.0 km away.
Topography around Tainan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Tainan.
Within 3 km, the terrain around Tainan has only modest variations in elevation — a maximum elevation change of 40 m around an average of 20 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 136 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,645 m.
The land around Tainan is covered by artificial surfaces (86%) within 3 km, water (30%) and artificial surfaces (27%) within 16 km, and water (46%) and trees (37%) within 80 km.
Taiwan travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 110 / 220 V · 60 Hz
- Happiness
- 6.7 / 10
- World Happiness, 2025
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Tainan (22.9908°, 120.2133°, elevation 26 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.