Climate averages 1991–2020
Chiayi City weather
in December.
A mild, moderately wet month: the 10th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in Chiayi City: daytime highs average 21.5°C and nights cool to about 13.7°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 60 mm of rain on roughly 11 days, which makes December a moderately wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 43 min on an average December day.
The nearest other city in this atlas is Xinying (24 km away). In December its highs average 22.5°C, 1.0°C warmer than Chiayi City, with 57 mm of rain.
Among the 28 cities listed in Taiwan, Chiayi City ranks 9th of 28 for the warmest December highs and 14th of 28 for the driest December (rainfall, lowest first). The mean December high of those 28 cities is 20.5°C; Chiayi City is 1.0°C warmer than that mean.
From December to January, average highs fall by 1.3°C to 20.2°C, and monthly rainfall falls from 60 mm to 53 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Chiayi City climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 20.2°C11.9°C | 11.9°C | 53 | 10.1 | 10.911 h |
| February | 21.3°C12.9°C | 12.9°C | 62 | 11.6 | 11.411 h |
| March | 23.7°C15.3°C | 15.3°C | 85 | 13.3 | 12.012 h |
| April | 26.1°C18.4°C | 18.4°C | 144 | 16.0 | 12.713 h |
| May | 28.0°C21.1°C | 21.1°C | 270 | 22.1 | 13.313 h |
| June | 29.0°C22.8°C | 22.8°C | 365 | 24.2 | 13.614 h |
| July | 29.5°C23.4°C | 23.4°C | 555 | 26.7 | 13.413 h |
| August | 29.0°C23.3°C | 23.3°C | 667 | 28.4 | 12.913 h |
| September | 28.5°C22.3°C | 22.3°C | 436 | 23.9 | 12.312 h |
| October | 27.0°C20.2°C | 20.2°C | 207 | 18.6 | 11.612 h |
| November | 25.0°C17.4°C | 17.4°C | 81 | 12.0 | 11.011 h |
| December, selected | 21.5°C13.7°C | 13.7°C | 60 | 10.7 | 10.711 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Xinying in DecemberTaiwan · 24 kmHigh 22.5°C · Low 15.5°C · 57 mm rain
- Douliu in DecemberTaiwan · 27 kmHigh 21.4°C · Low 14.1°C · 61 mm rain
- Nantou, Taiwan in DecemberTaiwan · 53 kmHigh 20.5°C · Low 13.5°C · 56 mm rain
- Yongkang in DecemberTaiwan · 54 kmHigh 22.8°C · Low 16.2°C · 47 mm rain
- Yuanlin in DecemberTaiwan · 55 kmHigh 22.0°C · Low 15.1°C · 50 mm rain
- Tainan in DecemberTaiwan · 60 kmHigh 22.7°C · Low 17.3°C · 47 mm rain
- Caotun in DecemberTaiwan · 60 kmHigh 21.4°C · Low 14.1°C · 56 mm rain
- Chang-hua in DecemberTaiwan · 67 kmHigh 21.7°C · Low 15.5°C · 50 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Chiayi City) is explained once on the Chiayi City year overview and on the Sources, method and limits page.