Alishan Temperature by Month

Alishan, Chiayi County, Taiwan has an average annual maximum temperature of 23°C (73°F), with moderate seasonal shifts ranging from 18°C (64°F) in January to 27°C (81°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

The moderate changes in the climate in Alishan ensure gradual weather shifts through each season. At night, temperatures drop to between 20°C (68°F) and 9°C (48°F) depending on the time of year.

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

From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. July, the warmest month, averages 210 hours of sunshine.

The chart below shows the average temperature throughout the year:

Alishan's average annual maximum temperature is 23°C (73°F). To put that in context, here's how it compares to a few well-known destinations:

Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.

Reykjavík, Iceland averages 9°C (48°F) a year, mild summers by Icelandic standards, but cold winters and frequent wind.

Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.

Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.

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 Alishan, January is the coolest month, with average highs of 18°C (64°F) and humidity around 76%, considered high. In July, the warmest month, temperatures average 27°C (81°F) with 89% humidity, conditions that feel very 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 Alishan this rarely lasts long on the ground.

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