Climate averages 1991–2020
Yilan, Taiwan weather
in December.
A mild, very wet month: the 10th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in Yilan, Taiwan: daytime highs average 18.8°C and nights cool to about 15.1°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 243 mm of rain on roughly 22 days, which makes December a very wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 38 min on an average December day.
The nearest other city in this atlas is Neihu (40 km away). In December its highs average 19.4°C, 0.6°C warmer than Yilan, Taiwan, with 108 mm of rain.
Among the 28 cities listed in Taiwan, Yilan, Taiwan ranks 27th of 28 for the warmest December highs and 26th of 28 for the driest December (rainfall, lowest first). The mean December high of those 28 cities is 20.5°C; Yilan, Taiwan is 1.7°C cooler than that mean.
From December to January, average highs fall by 1.4°C to 17.5°C, and monthly rainfall falls from 243 mm to 190 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
Yilan, Taiwan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 17.5°C13.4°C | 13.4°C | 190 | 22.0 | 10.811 h |
| February | 18.3°C13.6°C | 13.6°C | 165 | 19.9 | 11.311 h |
| March | 20.6°C15.1°C | 15.1°C | 151 | 19.9 | 12.012 h |
| April | 23.6°C18.0°C | 18.0°C | 185 | 20.7 | 12.713 h |
| May | 26.4°C21.4°C | 21.4°C | 297 | 25.2 | 13.313 h |
| June | 28.8°C24.2°C | 24.2°C | 319 | 25.3 | 13.614 h |
| July | 30.1°C25.5°C | 25.5°C | 271 | 22.3 | 13.514 h |
| August | 29.7°C25.4°C | 25.4°C | 329 | 22.9 | 13.013 h |
| September | 27.8°C23.7°C | 23.7°C | 336 | 20.5 | 12.312 h |
| October | 24.7°C21.1°C | 21.1°C | 394 | 21.6 | 11.612 h |
| November | 22.1°C18.5°C | 18.5°C | 336 | 21.0 | 11.011 h |
| December, selected | 18.8°C15.1°C | 15.1°C | 243 | 21.7 | 10.611 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
- Neihu in DecemberTaiwan · 40 kmHigh 19.4°C · Low 16.0°C · 108 mm rain
- Taipei in DecemberTaiwan · 40 kmHigh 19.3°C · Low 15.5°C · 108 mm rain
- Banqiao in DecemberTaiwan · 41 kmHigh 18.9°C · Low 14.3°C · 108 mm rain
- Keelung in DecemberTaiwan · 42 kmHigh 19.5°C · Low 16.5°C · 186 mm rain
- Shulin in DecemberTaiwan · 42 kmHigh 18.9°C · Low 14.5°C · 108 mm rain
- Sanxia in DecemberTaiwan · 43 kmHigh 19.7°C · Low 14.5°C · 66 mm rain
- Bade in DecemberTaiwan · 51 kmHigh 18.9°C · Low 13.9°C · 66 mm rain
- Taoyuan in DecemberTaiwan · 53 kmHigh 18.6°C · Low 14.5°C · 66 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 Yilan) is explained once on the Yilan, Taiwan year overview and on the Sources, method and limits page.