Tainan weather in September
In September, Tainan sees average daytime highs of 31°C and overnight lows near 26°C, with 184 mm of rain across 13.6 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.
Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 28% of the time in September, and the air most often feels miserable.
Daylight stretches from about 12 h 30 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Tainan's 8th-clearest and 11th-windiest month. For the whole year in context, see Tainan's year-round climate.
- Daytime high
- 31°
- 4th warmest
- Overnight low
- 26°
- 9th coldest
- Rainfall
- 184 mm
- 13.6 wet days
- Daylight
- 12 h 06 min
- 5:50 AM – 5:57 PM
- Cloud cover
- 63%
- 8th clearest
- Wind
- 8 km/h
- 11th windiest
- Solar energy
- 4.98 kWh/m²
- Travel score
- 4.1
- out of 10
Tainan is city in southern Taiwan.
- Density
- 847/km²
- people per km²
- Founded
- 1624
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Day-to-day highs hold fairly steady near 31°C through the month.
A typical September day in Tainan reaches about 31°C in the afternoon and slips back to 26°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 32°C. Set against its neighbours, September runs on par with August and about 2°C warmer than October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 30 |
| Avg low (°C) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 31 | 26 |
| 2 | 31 | 26 |
| 3 | 31 | 26 |
| 4 | 31 | 26 |
| 5 | 31 | 26 |
| 6 | 31 | 26 |
| 7 | 31 | 26 |
| 8 | 31 | 26 |
| 9 | 31 | 26 |
| 10 | 31 | 26 |
| 11 | 31 | 26 |
| 12 | 31 | 26 |
| 13 | 31 | 26 |
| 14 | 31 | 26 |
| 15 | 31 | 26 |
| 16 | 31 | 26 |
| 17 | 31 | 26 |
| 18 | 31 | 26 |
| 19 | 31 | 26 |
| 20 | 31 | 26 |
| 21 | 31 | 26 |
| 22 | 31 | 26 |
| 23 | 31 | 26 |
| 24 | 31 | 25 |
| 25 | 31 | 25 |
| 26 | 31 | 25 |
| 27 | 31 | 25 |
| 28 | 31 | 25 |
| 29 | 31 | 25 |
| 30 | 30 | 25 |
How September really feels in Tainan
Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Tainan weather by month
How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.
| 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 September
The sky is clear or mostly clear about 28% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to open up as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 32 | 32 | 32 | 33 | 35 | 35 | 37 | 39 | 39 | 41 | 42 | 44 | 45 | 45 | 47 | 47 | 48 | 48 | 50 | 50 | 51 | 53 | 54 | 55 | 56 | 58 | 58 | 59 | 60 | 61 |
| Cloudier (%) | 68 | 68 | 68 | 67 | 65 | 65 | 63 | 61 | 61 | 59 | 58 | 56 | 55 | 55 | 53 | 53 | 52 | 52 | 50 | 50 | 49 | 47 | 46 | 45 | 44 | 42 | 42 | 41 | 40 | 39 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 32 | 68 |
| 2 | 32 | 68 |
| 3 | 32 | 68 |
| 4 | 33 | 67 |
| 5 | 35 | 65 |
| 6 | 35 | 65 |
| 7 | 37 | 63 |
| 8 | 39 | 61 |
| 9 | 39 | 61 |
| 10 | 41 | 59 |
| 11 | 42 | 58 |
| 12 | 44 | 56 |
| 13 | 45 | 55 |
| 14 | 45 | 55 |
| 15 | 47 | 53 |
| 16 | 47 | 53 |
| 17 | 48 | 52 |
| 18 | 48 | 52 |
| 19 | 50 | 50 |
| 20 | 50 | 50 |
| 21 | 51 | 49 |
| 22 | 53 | 47 |
| 23 | 54 | 46 |
| 24 | 55 | 45 |
| 25 | 56 | 44 |
| 26 | 58 | 42 |
| 27 | 58 | 42 |
| 28 | 59 | 41 |
| 29 | 60 | 40 |
| 30 | 61 | 39 |
Chance of precipitation in September
Tainan gets around 184 mm of rain over 13.6 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 46% and peaks near 64% on the wettest days. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 64 | 63 | 62 | 61 | 60 | 58 | 56 | 55 | 53 | 51 | 50 | 48 | 47 | 46 | 44 | 43 | 42 | 41 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 | 31 | 30 |
| Rain chance (%) | |
|---|---|
| 1 | 64 |
| 2 | 63 |
| 3 | 62 |
| 4 | 61 |
| 5 | 60 |
| 6 | 58 |
| 7 | 56 |
| 8 | 55 |
| 9 | 53 |
| 10 | 51 |
| 11 | 50 |
| 12 | 48 |
| 13 | 47 |
| 14 | 46 |
| 15 | 44 |
| 16 | 43 |
| 17 | 42 |
| 18 | 41 |
| 19 | 41 |
| 20 | 40 |
| 21 | 39 |
| 22 | 38 |
| 23 | 37 |
| 24 | 36 |
| 25 | 35 |
| 26 | 34 |
| 27 | 33 |
| 28 | 32 |
| 29 | 31 |
| 30 | 30 |
Humidity in September
Most of September feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the miserable band about 75% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Muggy (%) | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 6 | 7 | 8 | 8 | 9 |
| Oppressive (%) | 7 | 8 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 17 | 18 | 20 | 21 | 22 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 33 | 34 | 34 | 35 | 35 |
| Miserable (%) | 93 | 92 | 92 | 90 | 89 | 88 | 87 | 86 | 85 | 84 | 82 | 80 | 78 | 77 | 76 | 74 | 73 | 71 | 70 | 69 | 67 | 66 | 64 | 63 | 61 | 61 | 59 | 58 | 57 | 56 |
| Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|
| 1 | 0 | 7 | 93 |
| 2 | 0 | 8 | 92 |
| 3 | 0 | 8 | 92 |
| 4 | 1 | 9 | 90 |
| 5 | 1 | 10 | 89 |
| 6 | 1 | 11 | 88 |
| 7 | 1 | 12 | 87 |
| 8 | 1 | 13 | 86 |
| 9 | 1 | 14 | 85 |
| 10 | 1 | 15 | 84 |
| 11 | 1 | 17 | 82 |
| 12 | 2 | 18 | 80 |
| 13 | 2 | 20 | 78 |
| 14 | 2 | 21 | 77 |
| 15 | 2 | 22 | 76 |
| 16 | 2 | 24 | 74 |
| 17 | 2 | 25 | 73 |
| 18 | 3 | 26 | 71 |
| 19 | 3 | 27 | 70 |
| 20 | 3 | 28 | 69 |
| 21 | 4 | 29 | 67 |
| 22 | 4 | 30 | 66 |
| 23 | 5 | 31 | 64 |
| 24 | 5 | 32 | 63 |
| 25 | 6 | 33 | 61 |
| 26 | 6 | 33 | 61 |
| 27 | 7 | 34 | 59 |
| 28 | 8 | 34 | 58 |
| 29 | 8 | 35 | 57 |
| 30 | 9 | 35 | 56 |
Wind in September
Winds average 8 km/h in September.
Across September, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 8 | calm |
| 2 | 8 | calm |
| 3 | 8 | calm |
| 4 | 8 | calm |
| 5 | 8 | calm |
| 6 | 8 | calm |
| 7 | 8 | calm |
| 8 | 8 | calm |
| 9 | 8 | calm |
| 10 | 8 | calm |
| 11 | 8 | calm |
| 12 | 8 | calm |
| 13 | 8 | calm |
| 14 | 8 | calm |
| 15 | 8 | calm |
| 16 | 8 | calm |
| 17 | 8 | calm |
| 18 | 8 | calm |
| 19 | 8 | calm |
| 20 | 8 | calm |
| 21 | 8 | calm |
| 22 | 8 | calm |
| 23 | 8 | calm |
| 24 | 8 | calm |
| 25 | 8 | calm |
| 26 | 8 | calm |
| 27 | 8 | calm |
| 28 | 8 | calm |
| 29 | 8 | calm |
| 30 | 8 | calm |
Sunrise & sunset in September
Daylight runs from about 12 h 30 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 42 minutes over September. Sunrise moves from 5:45 AM to 5:54 AM, and sunset from 6:13 PM to 5:43 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.5 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.3 | 12.3 | 12.3 | 12.3 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.1 | 12.0 | 12.0 | 12.0 | 12.0 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.8 | 11.8 |
| Sunrise (AM) | 5:45 | 5:45 | 5:45 | 5:46 | 5:46 | 5:46 | 5:47 | 5:47 | 5:47 | 5:48 | 5:48 | 5:48 | 5:49 | 5:49 | 5:49 | 5:50 | 5:50 | 5:50 | 5:50 | 5:51 | 5:51 | 5:51 | 5:52 | 5:52 | 5:52 | 5:53 | 5:53 | 5:53 | 5:54 | 5:54 |
| Sunset (PM) | 6:13 | 6:12 | 6:11 | 6:10 | 6:09 | 6:08 | 6:07 | 6:06 | 6:05 | 6:04 | 6:03 | 6:02 | 6:01 | 6:00 | 5:58 | 5:57 | 5:56 | 5:55 | 5:54 | 5:53 | 5:52 | 5:51 | 5:50 | 5:49 | 5:48 | 5:47 | 5:46 | 5:45 | 5:44 | 5:43 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.5 | 5:45 | 6:13 |
| 2 | 12.4 | 5:45 | 6:12 |
| 3 | 12.4 | 5:45 | 6:11 |
| 4 | 12.4 | 5:46 | 6:10 |
| 5 | 12.4 | 5:46 | 6:09 |
| 6 | 12.4 | 5:46 | 6:08 |
| 7 | 12.3 | 5:47 | 6:07 |
| 8 | 12.3 | 5:47 | 6:06 |
| 9 | 12.3 | 5:47 | 6:05 |
| 10 | 12.3 | 5:48 | 6:04 |
| 11 | 12.2 | 5:48 | 6:03 |
| 12 | 12.2 | 5:48 | 6:02 |
| 13 | 12.2 | 5:49 | 6:01 |
| 14 | 12.2 | 5:49 | 6:00 |
| 15 | 12.2 | 5:49 | 5:58 |
| 16 | 12.1 | 5:50 | 5:57 |
| 17 | 12.1 | 5:50 | 5:56 |
| 18 | 12.1 | 5:50 | 5:55 |
| 19 | 12.1 | 5:50 | 5:54 |
| 20 | 12.0 | 5:51 | 5:53 |
| 21 | 12.0 | 5:51 | 5:52 |
| 22 | 12.0 | 5:51 | 5:51 |
| 23 | 12.0 | 5:52 | 5:50 |
| 24 | 11.9 | 5:52 | 5:49 |
| 25 | 11.9 | 5:52 | 5:48 |
| 26 | 11.9 | 5:53 | 5:47 |
| 27 | 11.9 | 5:53 | 5:46 |
| 28 | 11.9 | 5:53 | 5:45 |
| 29 | 11.8 | 5:54 | 5:44 |
| 30 | 11.8 | 5:54 | 5:43 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 4.98 kWh/m².
For context, solar energy here swings from a low near 3.27 kWh/m² to a high of 5.43 kWh/m² in July across the year — September's 4.98 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.8 | 4.8 | 4.8 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.9 | Bright |
| 2 | 4.9 | Bright |
| 3 | 4.9 | Bright |
| 4 | 4.9 | Bright |
| 5 | 4.9 | Bright |
| 6 | 5.0 | Bright |
| 7 | 5.0 | Bright |
| 8 | 5.0 | Bright |
| 9 | 5.0 | Bright |
| 10 | 5.0 | Bright |
| 11 | 5.0 | Bright |
| 12 | 5.0 | Bright |
| 13 | 5.0 | Bright |
| 14 | 5.0 | Bright |
| 15 | 5.0 | Bright |
| 16 | 5.0 | Bright |
| 17 | 5.0 | Bright |
| 18 | 5.0 | Bright |
| 19 | 5.0 | Bright |
| 20 | 5.0 | Bright |
| 21 | 5.0 | Bright |
| 22 | 4.9 | Bright |
| 23 | 4.9 | Bright |
| 24 | 4.9 | Bright |
| 25 | 4.9 | Bright |
| 26 | 4.9 | Bright |
| 27 | 4.9 | Bright |
| 28 | 4.8 | Bright |
| 29 | 4.8 | Bright |
| 30 | 4.8 | Bright |
Hazard calendar for Tainan
In September, Tainan sits inside 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 September a good time to visit Tainan?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September 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 September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Tainan sees daytime highs around 31°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 14 days see rain.
Sea temperature near Tainan in September
The nearest coast averages about 29°C in September — 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 September
Clear-sky midday UV in September peaks 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 September
Average fine-particle pollution (PM2.5) through the year — so you can see where September 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).