Tainan weather in January

In January, Tainan sees average daytime highs of 22°C and overnight lows near 16°C, with 49 mm of rain across 7.2 wet days and about 10.7 hours of daylight. It is the 12th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 50% of the time in January, and the air most often feels comfortable.

Daylight stretches from about 10 h 36 min at the start of January to 10 h 54 min by month's end. Set against the rest of the year, January is Tainan's 1st-clearest and 1st-windiest month. For the whole year in context, see Tainan's year-round climate.

Daytime high
22°
12th warmest
Overnight low
16°
1st coldest
Rainfall
49 mm
7.2 wet days
Daylight
10 h 42 min
6:47 AM – 5:30 PM
Cloud cover
44%
1st clearest
Wind
13 km/h
1st windiest
Solar energy
3.64 kWh/m²
Travel score
7.4
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 January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical January day in Tainan reaches about 22°C in the afternoon and slips back to 16°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 26°C. Set against its neighbours, January runs about 2°C cooler than December and about 1°C cooler than February.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12316
22316
32316
42316
52316
62316
72316
82316
92316
102316
112316
122316
132316
142216
152216
162216
172216
182216
192216
202216
212216
222216
232216
242216
252216
262216
272215
282215
292216
302216
312216

How January really feels in Tainan

Once humidity and wind are folded in, January 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.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

January 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 January compares with the rest of the year at a glance. January is the 12th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 16°497.210.77.4
Feb23° / 17°447.811.27.3
Mar25° / 19°589.211.87.0
Apr28° / 22°12011.812.55.8
May30° / 25°29918.713.14.0
Jun31° / 26°39319.713.43.2
Jul32° / 27°30519.113.33.2
Aug31° / 26°40121.112.83.2
Sep31° / 26°18413.612.14.1
Oct29° / 24°546.411.55.9
Nov27° / 21°415.710.97.3
Dec24° / 18°476.410.67.7

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in January, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of January, with mostly cloudy or overcast conditions the remaining 33%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16832
26832
36931
46931
56931
67030
77030
87030
96931
106931
116931
126832
136832
146832
156733
166733
176733
186634
196634
206634
216535
226535
236535
246535
256535
266535
276535
286634
296634
306634
316634

Chance of precipitation in January

Any precipitation

Tainan gets around 49 mm of rain over 7.2 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 24% and peaks near 28% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
119
219
319
419
519
619
719
820
920
1021
1121
1222
1322
1423
1524
1624
1725
1826
1926
2027
2127
2228
2328
2428
2527
2627
2727
2827
2926
3026
3125

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the comfortable band about 38% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
120323711
220323611
321333611
421343511
521343411
621353411
721363310
821363310
921373210
1021373210
1121383210
122138329
132138319
142139318
152139318
162239318
172239317
182240317
192340316
202340316
212340315
222441305
232441305
242441304
252541304
262541304
272541294
282641294
292641294
302641295
312641295

Wind in January

Winds average 13 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 10 h 36 min at the start of January to 10 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over January. Sunrise moves from 6:44 AM to 6:44 AM, and sunset from 5:21 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.66:445:21
210.66:445:21
310.66:455:22
410.66:455:22
510.66:455:23
610.66:455:24
710.66:465:24
810.76:465:25
910.76:465:26
1010.76:465:26
1110.76:465:27
1210.76:465:28
1310.76:465:28
1410.76:465:29
1510.76:465:30
1610.76:475:30
1710.76:475:31
1810.86:475:32
1910.86:465:32
2010.86:465:33
2110.86:465:34
2210.86:465:34
2310.86:465:35
2410.86:465:36
2510.86:465:37
2610.96:465:37
2710.96:455:38
2810.96:455:39
2910.96:455:39
3010.96:455:40
3110.96:445:41

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 3.64 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 — January's 3.64 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.4Moderate
23.4Moderate
33.5Moderate
43.5Moderate
53.5Moderate
63.5Moderate
73.5Moderate
83.5Moderate
93.5Moderate
103.5Moderate
113.5Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.6Moderate
163.6Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.7Moderate
233.7Moderate
243.7Moderate
253.7Moderate
263.7Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.8Moderate
313.9Moderate
Planning a trip in January

Hazard calendar for Tainan

In seasonPeak

In January, 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.

Pacific typhoon
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Tainan?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.4
Sightseeing
2nd-best month of the year
5.4
Beach & pool
9th-best month of the year

January is one of the better times to visit Tainan for general sightseeing.

What to pack for Tainan in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Tainan sees daytime highs around 22°C and nights near 16°C. Worth packing: light clothes. About 7 days see rain.

light clothes

Sea temperature near Tainan in January

The nearest coast averages about 24°C in January — 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.

22°24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan24Refreshing
Feb24Refreshing
Mar24Warm
Apr26Warm
May28Warm
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct28Warm
Nov26Warm
Dec25Warm

UV index in Tainan in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJun 17UV 12Dec 22UV 6
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Very high
Apr9Very high
May9Very high
Jun12Extreme
Jul10Very high
Aug12Extreme
Sep11Extreme
Oct8Very high
Nov7Very high
Dec6High

Air quality in Tainan in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January 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).

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorMar 1848 µg/m³Jul 1828 µg/m³
PM2.5 (µg/m³)Level
Jan41Poor
Feb44Poor
Mar48Poor
Apr46Poor
May38Poor
Jun30Moderate
Jul27Moderate
Aug29Moderate
Sep38Poor
Oct40Poor
Nov40Poor
Dec36Poor
Location & terrain

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.

YujingXinyingKaohsiungFengshanBudaiTaibaoChiayi City

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.

3 km
40 m
16 km
136 m
80 km
3,645 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Yongkang 6.0 km · Yujing 29 km · Xinying 37 km · Kaohsiung 43 km · Fengshan 43 km · Budai 43 km · Taibao 54 km · Chiayi City 59 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
Buddhist 35%Taoist 33%none or unspecified 18%folk religion approximately 10%

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).