Mae Sai Temperature by Month

Mae Sai, Chiang Rai Province, Thailand has an average annual maximum temperature of 31°C (88°F), with moderate seasonal shifts ranging from 27°C (81°F) in December to 35°C (95°F) in April. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

In Mae Sai, seasonal changes bring about a moderate variation in temperatures. Nighttime lows range from 21°C (70°F) in April to 13°C (55°F) in December.

The chart below illustrates the average maximum day and minimum night temperatures in Mae Sai 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. April, the warmest month, gets 281 hours of sunshine.

The chart below shows the average temperature throughout the year:

Mae Sai's average annual maximum temperature is 31°C (88°F). To put that in context, here's how it compares to a few well-known destinations:

Seville, Spain averages 23°C (73°F) a year, one of the warmer cities in Western Europe, with long hot summers.

Glasgow, Scotland averages 13°C (55°F) a year, mild but often grey, with cold winters and rarely hot summers.

New York City, USA averages 17°C (63°F) a year, with hot humid summers and cold winters that bring regular snowfall.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

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 Mae Sai, December is the coolest month, with average highs of 27°C (81°F) and humidity around 77%, considered high. In April, the warmest month, temperatures average 35°C (95°F) with 66% 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.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

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