Chiayi City in Winter
In winter (December, January and February), Chiayi City sees average daytime highs around 21°C and overnight lows near 13°C, with 175 mm of rain over about 32 wet days across the season. It is the coldest season of the year and the driest season of the year.
Across winter, daytime highs hold fairly steady around 21°C. The sky is clear or mostly clear about 42% of the time across winter, and the air most often feels comfortable.
Winter is Chiayi City's best season of the year to visit on our travel score. For the whole year in context, see Chiayi City's year-round climate.
- Avg daytime high
- 21°C
- coldest season of the year
- Avg overnight low
- 13°C
- Rainfall
- 175 mm
- 32 wet days
- Avg wind
- 7 km/h
- Travel score
- 6.6
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Chiayi City in Winter
Across winter, daytime highs hold fairly steady around 21°C.
A typical winter day in Chiayi City reaches about 21°C and drops to 13°C overnight. The warmest of the three months is December, the coolest January.
How winter really feels in Chiayi City
Once humidity and wind are folded in, winter brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
winter sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Chiayi City weather by month
How the three winter months (December, January and February) 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 | 20° / 12° | 53 | 10 | 10.7 | 6.6 |
| Feb | 21° / 13° | 62 | 11.6 | 11.2 | 6.3 |
| Mar | 24° / 16° | 85 | 13.3 | 11.8 | 6.4 |
| Apr | 26° / 19° | 144 | 16 | 12.5 | 5.7 |
| May | 28° / 21° | 270 | 22.1 | 13.1 | 4.3 |
| Jun | 29° / 23° | 365 | 24.2 | 13.4 | 3.3 |
| Jul | 30° / 24° | 555 | 26.7 | 13.3 | 3.0 |
| Aug | 30° / 24° | 667 | 28.5 | 12.8 | 2.9 |
| Sep | 29° / 23° | 436 | 24 | 12.1 | 3.6 |
| Oct | 27° / 20° | 207 | 18.6 | 11.4 | 5.3 |
| Nov | 25° / 18° | 81 | 12 | 10.9 | 6.7 |
| Dec | 22° / 14° | 60 | 10.7 | 10.6 | 6.8 |
Cloud cover in Winter
The sky is clear or mostly clear about 42% of the time across winter.
Chance of precipitation in Winter
Chiayi City gets around 175 mm of rain over 32 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 7 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 h 42 min in early December to 11 h 30 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 4.0 kWh/m².
Hazard calendar for Chiayi City
In winter, Chiayi City overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Chiayi City sits in the Pacific typhoon belt; the season peaks July–October.
Chiayi City's monsoon runs June–September, when most of the year's rain falls.
Is winter a good time to visit Chiayi City?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit Chiayi City for sightseeing.
What to pack for Chiayi City in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Chiayi City sees daytime highs around 21°C and nights near 13°C. Worth packing: rain gear. About 32 days see rain.
Sea temperature near Chiayi City in Winter
The nearest coast averages about 22°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 35 km away) is warmest in July at about 29°C and coldest in January near 22°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) | 22 | 22 | 23 | 25 | 27 | 28 | 29 | 29 | 28 | 27 | 25 | 23 |
| Comfort | Refreshing | Refreshing | Refreshing | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 22 | Refreshing |
| Feb | 22 | Refreshing |
| Mar | 23 | Refreshing |
| Apr | 25 | Warm |
| May | 27 | Warm |
| Jun | 28 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 28 | Tropical |
| Oct | 27 | Warm |
| Nov | 25 | Warm |
| Dec | 23 | Refreshing |
UV index in Chiayi City in Winter
Clear-sky midday UV across winter averages 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 Chiayi City peaks around June 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 | 8 | 10 | 12 | 10 | 11 | 9 | 7 | 7 | 6 |
| Level | High | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 6 | High |
| Feb | 8 | Very high |
| Mar | 10 | Very high |
| Apr | 8 | Very high |
| May | 10 | Very high |
| Jun | 12 | Extreme |
| Jul | 10 | Extreme |
| Aug | 11 | Extreme |
| Sep | 9 | Very high |
| Oct | 7 | Very high |
| Nov | 7 | High |
| Dec | 6 | High |
Air quality in Chiayi City in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Chiayi City is worst in March — around 40 µg/m³ PM2.5 (poor), about 1.7× the cleanest month (July, 23 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) | 36 | 36 | 40 | 36 | 28 | 24 | 23 | 25 | 31 | 33 | 34 | 33 |
| Level | Poor | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 36 | Poor |
| Feb | 36 | Poor |
| Mar | 40 | Poor |
| Apr | 36 | Poor |
| May | 28 | Moderate |
| Jun | 24 | Moderate |
| Jul | 23 | Moderate |
| Aug | 25 | Moderate |
| Sep | 31 | Moderate |
| Oct | 33 | Moderate |
| Nov | 34 | Moderate |
| Dec | 33 | Moderate |
Where is Chiayi City?
Chiayi City sits at 23.5°N, 120.4°E, 45 m above sea level, in Taiwan. The nearest listed city is Taibao, 12 km away.
Topography around Chiayi City
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Chiayi City.
Within 3 km, the terrain around Chiayi City has only modest variations in elevation — a maximum elevation change of 84 m around an average of 40 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 860 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,887 m.
The land around Chiayi City is covered by artificial surfaces (65%) and trees (23%) within 3 km, trees (46%) and cropland (37%) within 16 km, and trees (47%) and water (32%) 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 Chiayi City (23.4792°, 120.4489°, elevation 45 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.