Chiayi City Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Chiayi City, Chiayi County, Taiwan. This average is based on long-term data collected between 1990 and 2020. Now, let's break down all the details for a clearer picture.

Chiayi City has a notably wet climate with abundant precipitation, recording 2963 mm (117 in) of rainfall per year. It does, however, have a distinct rainy season during certain months. Have a look at our detailed charts below to see how precipitation varies throughout the year.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

The climate in Chiayi City shows significant variation throughout the year. Expect 617 mm (24 in) of precipitation during the wettest month August, distributed over 16 rainy days.

In contrast, January offers drier and sunnier days, with around 63 mm (2.5 in) of rainfall over 15 rainy days.

August, the wettest month, has a maximum daytime temperature of 31°C (88°F). The city receives 189 hours of sunshine in this period. During the driest month January you can expect a temperature of 22°C (72°F). For more detailed insights into the city's temperatures, visit our Chiayi City Temperature page.

Chiayi City's average annual precipitation is 2963 mm (117 in). Let's compare this to some popular worldwide tourist destinations:

In Lisbon, Portugal, the average annual precipitation is 774 mm (30 in), characterized by wet winters and dry summers typical of the Mediterranean climate.

In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.

In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.

Mumbai, India, experiences a tropical monsoon climate with 1860 mm (73 in) of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.

Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.

Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.

Precipitation has a very strong role in determining the local climate and ecosystem:

• Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
• Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.

• "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
• The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
• The greatest snowfall recorded was on Mt. Rainier, Washington State, USA, over 31.5 meters (103 feet) fell during the winter of 1972.

For more detailed information about Chiayi City's weather, including sunshine hours, humidity levels, and temperature data, visit our Chiayi City Climate page.