Ban San Sai (2) Temperature by Month

Ban San Sai (2), Chiang Mai Province, Thailand has an average annual maximum temperature of 33°C (91°F), with moderate seasonal shifts ranging from 30°C (86°F) in December to 38°C (100°F) in April. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

The moderate changes in the climate in Ban San Sai (2) ensure gradual weather shifts through each season. At night, temperatures drop to between 24°C (75°F) and 16°C (61°F) depending on the time of year.

The chart below illustrates the average maximum day and minimum night temperatures in Ban San Sai (2) by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. April, the city's warmest month, gets 280 hours of sunshine.

The chart below shows the average temperature throughout the year:

Ban San Sai (2)'s average annual maximum temperature is 33°C (91°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

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.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

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 Ban San Sai (2), December is the coolest month, with average highs of 30°C (86°F) and humidity around 73%, considered high. In April, the warmest month, temperatures average 38°C (100°F) with 57% humidity, conditions that feel moderate. 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 Ban San Sai (2)'s weather, including monthly rainfall, sunshine hours, and humidity, visit our Ban San Sai (2) climate page.