Tainan weather in December
In December, Tainan sees average daytime highs of 24°C and overnight lows near 18°C, with 47 mm of rain across 6.4 wet days and about 10.6 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.
Highs ease over the month, from about 25°C in the first days to 23°C by the end. The sky is clear or mostly clear about 47% of the time in December, and the air most often feels humid.
Daylight stretches from about 10 h 42 min at the start of December to 10 h 36 min by month's end. Set against the rest of the year, December is Tainan's 4th-clearest and 2nd-windiest month. For the whole year in context, see Tainan's year-round climate.
- Daytime high
- 24°
- 10th warmest
- Overnight low
- 18°
- 3rd coldest
- Rainfall
- 47 mm
- 6.4 wet days
- Daylight
- 10 h 36 min
- 6:37 AM – 5:13 PM
- Cloud cover
- 48%
- 4th clearest
- Wind
- 13 km/h
- 2nd windiest
- Solar energy
- 3.27 kWh/m²
- Travel score
- 7.7
- 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 December
Highs ease over the month, from about 25°C in the first days to 23°C by the end.
A typical December day in Tainan reaches about 24°C in the afternoon and slips back to 18°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 27°C. Set against its neighbours, December runs about 3°C cooler than November and about 2°C warmer than January.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg low (°C) | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 25 | 19 |
| 2 | 25 | 19 |
| 3 | 25 | 19 |
| 4 | 25 | 19 |
| 5 | 25 | 19 |
| 6 | 25 | 19 |
| 7 | 25 | 18 |
| 8 | 25 | 18 |
| 9 | 25 | 18 |
| 10 | 24 | 18 |
| 11 | 24 | 18 |
| 12 | 24 | 18 |
| 13 | 24 | 18 |
| 14 | 24 | 18 |
| 15 | 24 | 18 |
| 16 | 24 | 18 |
| 17 | 24 | 17 |
| 18 | 24 | 17 |
| 19 | 24 | 17 |
| 20 | 23 | 17 |
| 21 | 23 | 17 |
| 22 | 23 | 17 |
| 23 | 23 | 17 |
| 24 | 23 | 17 |
| 25 | 23 | 17 |
| 26 | 23 | 17 |
| 27 | 23 | 17 |
| 28 | 23 | 17 |
| 29 | 23 | 17 |
| 30 | 23 | 16 |
| 31 | 23 | 16 |
How December really feels in Tainan
Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Tainan weather by month
How December compares with the rest of the year at a glance. December is the 10th-warmest and 10th-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 December
The sky is clear or mostly clear about 47% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 35%.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 66 | 66 | 66 | 66 | 65 | 65 | 64 | 64 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 64 | 64 | 64 | 64 | 65 | 65 | 65 | 66 | 67 | 67 | 67 | 67 | 68 |
| Cloudier (%) | 34 | 34 | 34 | 34 | 35 | 35 | 36 | 36 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 36 | 36 | 36 | 36 | 35 | 35 | 35 | 34 | 33 | 33 | 33 | 33 | 32 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 66 | 34 |
| 2 | 66 | 34 |
| 3 | 66 | 34 |
| 4 | 66 | 34 |
| 5 | 65 | 35 |
| 6 | 65 | 35 |
| 7 | 64 | 36 |
| 8 | 64 | 36 |
| 9 | 63 | 37 |
| 10 | 63 | 37 |
| 11 | 63 | 37 |
| 12 | 63 | 37 |
| 13 | 63 | 37 |
| 14 | 63 | 37 |
| 15 | 63 | 37 |
| 16 | 63 | 37 |
| 17 | 63 | 37 |
| 18 | 63 | 37 |
| 19 | 64 | 36 |
| 20 | 64 | 36 |
| 21 | 64 | 36 |
| 22 | 64 | 36 |
| 23 | 65 | 35 |
| 24 | 65 | 35 |
| 25 | 65 | 35 |
| 26 | 66 | 34 |
| 27 | 67 | 33 |
| 28 | 67 | 33 |
| 29 | 67 | 33 |
| 30 | 67 | 33 |
| 31 | 68 | 32 |
Chance of precipitation in December
Tainan gets around 47 mm of rain over 6.4 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 20% and peaks near 22% on the wettest days.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 20 | 20 | 20 | 19 | 19 | 19 |
| Rain chance (%) | |
|---|---|
| 1 | 19 |
| 2 | 19 |
| 3 | 19 |
| 4 | 19 |
| 5 | 19 |
| 6 | 19 |
| 7 | 19 |
| 8 | 20 |
| 9 | 20 |
| 10 | 20 |
| 11 | 21 |
| 12 | 21 |
| 13 | 21 |
| 14 | 22 |
| 15 | 22 |
| 16 | 22 |
| 17 | 22 |
| 18 | 22 |
| 19 | 22 |
| 20 | 22 |
| 21 | 22 |
| 22 | 22 |
| 23 | 21 |
| 24 | 21 |
| 25 | 21 |
| 26 | 20 |
| 27 | 20 |
| 28 | 20 |
| 29 | 19 |
| 30 | 19 |
| 31 | 19 |
Humidity in December
Most of December feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the humid band about 38% of days. Sticky, muggy-or-worse air turns up on roughly 26% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 11 | 12 | 12 | 13 | 13 | 14 | 15 | 15 | 16 | 17 | 18 | 18 | 19 | 19 | 20 | 20 | 20 | 20 | 20 |
| Comfortable (%) | 14 | 15 | 16 | 17 | 18 | 18 | 19 | 19 | 20 | 20 | 20 | 21 | 21 | 22 | 22 | 23 | 23 | 24 | 24 | 25 | 25 | 26 | 27 | 27 | 28 | 28 | 29 | 29 | 30 | 31 | 31 |
| Humid (%) | 28 | 29 | 31 | 33 | 34 | 36 | 37 | 39 | 40 | 40 | 41 | 41 | 41 | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 39 | 39 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 37 | 37 |
| Muggy (%) | 41 | 40 | 38 | 37 | 35 | 33 | 32 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 16 | 15 | 14 | 13 | 13 | 12 | 12 | 11 |
| Oppressive (%) | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 6 | 14 | 28 | 41 | 10 |
| 2 | 6 | 15 | 29 | 40 | 9 |
| 3 | 7 | 16 | 31 | 38 | 8 |
| 4 | 7 | 17 | 33 | 37 | 7 |
| 5 | 7 | 18 | 34 | 35 | 6 |
| 6 | 8 | 18 | 36 | 33 | 5 |
| 7 | 8 | 19 | 37 | 32 | 4 |
| 8 | 8 | 19 | 39 | 30 | 4 |
| 9 | 9 | 20 | 40 | 29 | 3 |
| 10 | 9 | 20 | 40 | 28 | 3 |
| 11 | 10 | 20 | 41 | 27 | 2 |
| 12 | 10 | 21 | 41 | 26 | 2 |
| 13 | 11 | 21 | 41 | 25 | 2 |
| 14 | 12 | 22 | 41 | 24 | 2 |
| 15 | 12 | 22 | 41 | 23 | 2 |
| 16 | 13 | 23 | 41 | 22 | 2 |
| 17 | 13 | 23 | 40 | 22 | 1 |
| 18 | 14 | 24 | 40 | 21 | 1 |
| 19 | 15 | 24 | 40 | 20 | 1 |
| 20 | 15 | 25 | 40 | 19 | 1 |
| 21 | 16 | 25 | 39 | 18 | 1 |
| 22 | 17 | 26 | 39 | 17 | 1 |
| 23 | 18 | 27 | 38 | 16 | 1 |
| 24 | 18 | 27 | 38 | 16 | 1 |
| 25 | 19 | 28 | 38 | 15 | 1 |
| 26 | 19 | 28 | 38 | 14 | 1 |
| 27 | 20 | 29 | 38 | 13 | 0 |
| 28 | 20 | 29 | 38 | 13 | 0 |
| 29 | 20 | 30 | 38 | 12 | 0 |
| 30 | 20 | 31 | 37 | 12 | 0 |
| 31 | 20 | 31 | 37 | 11 | 0 |
Wind in December
Winds average 13 km/h in December.
Across December, daily wind ranges from about 12 km/h on the calmest days to 13 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
| Feels | calm | calm | calm | calm | calm | calm | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 12 | calm |
| 2 | 12 | calm |
| 3 | 12 | calm |
| 4 | 12 | calm |
| 5 | 12 | calm |
| 6 | 12 | calm |
| 7 | 12 | light breeze |
| 8 | 12 | light breeze |
| 9 | 12 | light breeze |
| 10 | 12 | light breeze |
| 11 | 12 | light breeze |
| 12 | 12 | light breeze |
| 13 | 12 | light breeze |
| 14 | 12 | light breeze |
| 15 | 13 | light breeze |
| 16 | 13 | light breeze |
| 17 | 13 | light breeze |
| 18 | 13 | light breeze |
| 19 | 13 | light breeze |
| 20 | 13 | light breeze |
| 21 | 13 | light breeze |
| 22 | 13 | light breeze |
| 23 | 13 | light breeze |
| 24 | 13 | light breeze |
| 25 | 13 | light breeze |
| 26 | 13 | light breeze |
| 27 | 13 | light breeze |
| 28 | 13 | light breeze |
| 29 | 13 | light breeze |
| 30 | 13 | light breeze |
| 31 | 13 | light breeze |
Sunrise & sunset in December
Daylight runs from about 10 h 42 min at the start of December to 10 h 36 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 6 minutes over December. Sunrise moves from 6:28 AM to 6:44 AM, and sunset from 5:10 PM to 5:20 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 |
| Sunrise (AM) | 6:28 | 6:29 | 6:30 | 6:30 | 6:31 | 6:31 | 6:32 | 6:33 | 6:33 | 6:34 | 6:35 | 6:35 | 6:36 | 6:36 | 6:37 | 6:37 | 6:38 | 6:39 | 6:39 | 6:40 | 6:40 | 6:41 | 6:41 | 6:41 | 6:42 | 6:42 | 6:43 | 6:43 | 6:43 | 6:44 | 6:44 |
| Sunset (PM) | 5:10 | 5:10 | 5:10 | 5:10 | 5:10 | 5:10 | 5:10 | 5:11 | 5:11 | 5:11 | 5:11 | 5:12 | 5:12 | 5:12 | 5:13 | 5:13 | 5:14 | 5:14 | 5:14 | 5:15 | 5:15 | 5:16 | 5:16 | 5:17 | 5:17 | 5:18 | 5:18 | 5:19 | 5:19 | 5:20 | 5:20 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 10.7 | 6:28 | 5:10 |
| 2 | 10.7 | 6:29 | 5:10 |
| 3 | 10.7 | 6:30 | 5:10 |
| 4 | 10.7 | 6:30 | 5:10 |
| 5 | 10.7 | 6:31 | 5:10 |
| 6 | 10.6 | 6:31 | 5:10 |
| 7 | 10.6 | 6:32 | 5:10 |
| 8 | 10.6 | 6:33 | 5:11 |
| 9 | 10.6 | 6:33 | 5:11 |
| 10 | 10.6 | 6:34 | 5:11 |
| 11 | 10.6 | 6:35 | 5:11 |
| 12 | 10.6 | 6:35 | 5:12 |
| 13 | 10.6 | 6:36 | 5:12 |
| 14 | 10.6 | 6:36 | 5:12 |
| 15 | 10.6 | 6:37 | 5:13 |
| 16 | 10.6 | 6:37 | 5:13 |
| 17 | 10.6 | 6:38 | 5:14 |
| 18 | 10.6 | 6:39 | 5:14 |
| 19 | 10.6 | 6:39 | 5:14 |
| 20 | 10.6 | 6:40 | 5:15 |
| 21 | 10.6 | 6:40 | 5:15 |
| 22 | 10.6 | 6:41 | 5:16 |
| 23 | 10.6 | 6:41 | 5:16 |
| 24 | 10.6 | 6:41 | 5:17 |
| 25 | 10.6 | 6:42 | 5:17 |
| 26 | 10.6 | 6:42 | 5:18 |
| 27 | 10.6 | 6:43 | 5:18 |
| 28 | 10.6 | 6:43 | 5:19 |
| 29 | 10.6 | 6:43 | 5:19 |
| 30 | 10.6 | 6:44 | 5:20 |
| 31 | 10.6 | 6:44 | 5:20 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 3.27 kWh/m² — the year's lowest.
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 — December's 3.27 kWh/m² sits near the bottom.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 3.5 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.4 | 3.4 | 3.4 | 3.4 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 3.5 | Moderate |
| 2 | 3.4 | Moderate |
| 3 | 3.4 | Moderate |
| 4 | 3.4 | Moderate |
| 5 | 3.4 | Moderate |
| 6 | 3.4 | Moderate |
| 7 | 3.4 | Moderate |
| 8 | 3.3 | Moderate |
| 9 | 3.3 | Moderate |
| 10 | 3.3 | Moderate |
| 11 | 3.3 | Moderate |
| 12 | 3.3 | Moderate |
| 13 | 3.3 | Moderate |
| 14 | 3.3 | Moderate |
| 15 | 3.3 | Moderate |
| 16 | 3.3 | Moderate |
| 17 | 3.3 | Moderate |
| 18 | 3.3 | Moderate |
| 19 | 3.3 | Moderate |
| 20 | 3.3 | Moderate |
| 21 | 3.3 | Moderate |
| 22 | 3.3 | Moderate |
| 23 | 3.3 | Moderate |
| 24 | 3.3 | Moderate |
| 25 | 3.3 | Moderate |
| 26 | 3.3 | Moderate |
| 27 | 3.3 | Moderate |
| 28 | 3.4 | Moderate |
| 29 | 3.4 | Moderate |
| 30 | 3.4 | Moderate |
| 31 | 3.4 | Moderate |
Hazard calendar for Tainan
In December, Tainan sits inside its pacific typhoon 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 December a good time to visit Tainan?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is one of the better times to visit Tainan for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Tainan in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Tainan sees daytime highs around 24°C and nights near 18°C. Worth packing: light clothes. About 6 days see rain.
Sea temperature near Tainan in December
The nearest coast averages about 25°C in December — 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 December
Clear-sky midday UV in December peaks around 6 — enough to warrant sun protection. 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 December
Average fine-particle pollution (PM2.5) through the year — so you can see where December 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).