Tainan in Fall
In fall (September, October and November), Tainan sees average daytime highs around 29°C and overnight lows near 23°C, with 278 mm of rain over about 26 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 31°C in early September to 26°C by late November. The sky is clear or mostly clear about 41% of the time across fall, and the air most often feels miserable.
Fall is Tainan's 2nd-best season to visit on our travel score. For the whole year in context, see Tainan's year-round climate.
- Avg daytime high
- 29°C
- 2nd-warmest season
- Avg overnight low
- 23°C
- Rainfall
- 278 mm
- 26 wet days
- Avg wind
- 9 km/h
- Travel score
- 5.8
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Tainan in Fall
Over the season highs ease from about 31°C in early September to 26°C by late November.
A typical fall day in Tainan reaches about 29°C and drops to 23°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Tainan
Once humidity and wind are folded in, fall brings about 50 days that feel above 32°C and 0 that feel at or below 0°C.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Tainan weather by month
How the three fall months (September, October and November) 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 Fall
The sky is clear or mostly clear about 41% of the time across fall.
Chance of precipitation in Fall
Tainan gets around 278 mm of rain over 26 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 9 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 30 min in early September to 10 h 42 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.4 kWh/m².
Hazard calendar for Tainan
In fall, 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 fall a good time to visit Tainan?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Tainan for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Tainan in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Tainan sees daytime highs around 29°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.
Sea temperature near Tainan in Fall
The nearest coast averages about 27°C across fall — 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 Fall
Clear-sky midday UV across fall averages around 9 (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 Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall 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.