Yilan City Temperature by Month

The average annual maximum temperature in Yilan City, Yilan County, Taiwan is 25°C (77°F), with daytime highs ranging from 18°C (64°F) in January to 31°C (88°F) in July. This page covers monthly averages, day-night differences, and how Yilan City compares to cities worldwide.

In Yilan City, temperatures can shift dramatically between very warm in summer and mild in winter. Nights follow the same pattern, with lows ranging from 25°C (77°F) in July to 13°C (55°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Yilan City by month:

The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. July, the warmest month, gets 224 hours of sunshine.

The chart below shows the average temperature throughout the year:

Yilan City's average annual maximum temperature is 25°C (77°F). To put that in context, here's how it compares to a few well-known destinations:

Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.

Queenstown, New Zealand averages 10°C (50°F) annually, remember seasons are flipped, so its coldest months fall in June and July.

Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters, and seasons reversed compared to Europe.

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Yilan City, January is the coolest month, with average highs of 18°C (64°F) and humidity around 81%, considered very high. In July, the warmest month, temperatures average 31°C (88°F) with 79% humidity, conditions that feel high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Yilan City this rarely lasts long on the ground.

For more on Yilan City's weather, including monthly rainfall, sunshine hours, and humidity, visit our Yilan City climate page.