Mae Sai Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Mae Sai, Chiang Rai Province, Thailand. These averages rely on historical data collected over 30 years, from 1990 to 2020. Now, let's explore all the details to give you a full picture.

Mae Sai has a notably wet climate with abundant precipitation, recording 2303 mm (91 in) of rainfall per year. It does, however, have a distinct dry and 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 Mae Sai shows significant variation throughout the year. Expect 460 mm (18 in) of precipitation during the wettest month July, distributed over 22 rainy days.

In contrast, February offers drier and sunnier days, with around 19 mm (0.7 in) of rainfall over 2 rainy days.

July, the wettest month, has a maximum daytime temperature of 32°C (90°F). The city receives 123 hours of sunshine in this period. During the driest month February you can expect a temperature of 31°C (88°F). For more detailed insights into the city's temperatures, visit our Mae Sai Temperature page.

Mae Sai's average annual precipitation is 2303 mm (91 in). Let's compare this to some popular worldwide tourist destinations:

New York City, USA, receives 1276 mm (50 in) of rainfall annually, with precipitation evenly distributed throughout the year.

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

In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.

Singapore, situated near the equator, gets 2581 mm (102 in) of rainfall annually, with no distinct dry season and consistent monthly precipitation.

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 Mae Sai's weather, including sunshine hours, humidity levels, and temperature data, visit our Mae Sai Climate page.