Yilan City Weather in December
With daytime temperatures of 20°C (68°F) and nighttime lows of 15°C (59°F), December in Yilan City brings pleasant temperatures during the day. Do keep in mind that December is part of the rainy season, with frequent and often heavy rainfall.
Rainfall in Yilan City in December
As part of the rainy season, Yilan City sees around 18 days of rain in December, with an average of 249 mm (9.8 in). Rainfall this month is frequent and tends to be fairly heavy when it does fall. Packing waterproofs is a good idea.
Temperature in Yilan City in December
Temperatures in Yilan City in December top out at 20°C (68°F) and drop to 15°C (59°F) overnight. December is in the winter season. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to around 15°C (59°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Yilan City in December
This month sees fewer sunny days, with about 69 hours of sunshine, perfect for those who enjoy cooler temperatures.If your ideal day consists of dry skies and pleasant temperatures, March typically offers the best circumstances for Yilan City.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Taiwan, check out our Yilan City's climate page.
Yilan City Temperature in December
Min Temperature
15°C (59°F)
Max Temperature
20°C (68°F)
Chance of Rain
61%
Precipitation
249 mm (9.8 in)
Rainy days
18 days
Humidity
81%
Sunshine
69 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Yilan City typically stay consistent throughout December, with daily highs averaging around 20°C (68°F). Nights are pleasant, with lows typically ranging from 14°C (57°F) to 17°C (63°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Yilan City in December
Browse day-by-day weather records for Yilan City spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Yilan City historical weather extremes in December
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Yilan City.
- The warmest day in December was on December 4, 2018, with a maximum of 31°C (88°F).
- The coldest December day was on December 22, 1999, with a maximum of 9°C (48°F).
- The coldest night in December in Yilan City was on December 17, 1985, with a minimum of 4°C (39°F).
Best Places in Taiwan in December
Find out more about the weather in Taiwan and which places have the best travel conditions in this month. See all of Taiwan in December →
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What to Wear in Yilan City in December
Comfortable temperatures call for an easy wardrobe in December. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses aren't essential this month, though you might want them for the occasional bright moment.What To Do in Yilan City in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Taiwan, check out our Yilan City's climate page.
Temperature Rainfall Sunshine Humidity
See the full Yilan City climate overview or explore weather in Taiwan.
