Weather in Chiang Rai in December 2025
- December is usually the coldest month of the year in Chiang Rai;
Average weather
Average temperature in Chiang Rai in December
Going from a maximum of +90°F during the day to a minimum of +54°F during the night, the temperature in December averages around +84°F.
The average maximum temperature goes down 10% by the end of the month, compared with the beginning of the month, from +86°F to +82°F.
Is Chiang Rai warm or cold in December?
Chiang Rai is typically warm in December.
Maximum temperatures go down compared to the previous month from +84°F to +81°F. The minimum temperature also goes down from +66°F to +59°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
December is the coldest month in Chiang Rai, here is the comparison with other months:
Climate in Chiang Rai in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +84°F | +81°F | +82°F | ||||
| Min. temperature | ||||||
| +48°F | +41°F | +45°F | ||||
| Max. temperature | ||||||
| +95°F | +91°F | +91°F | ||||
| Rainfall | ||||||
| 53 mm | 21 mm | 21 mm | ||||
| Wind | ||||||
| 0 m/s | 0 m/s | 0 m/s | ||||
| Humidity | ||||||
| 80% | 79% | 76% | ||||
| Air pressure | ||||||
| 1014 HPa | 1015 HPa | 1013 HPa | ||||
| Sunny days | ||||||
| 10 | 15 | 17 | ||||
| Cloudy days | ||||||
| 7 | 9 | 6 | ||||
| Rainy days | ||||||
| 13 | 7 | 8 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
December weather is still as good as in November. It’s getting colder in December. From +84°F in the day, the average maximum temperature lowers to +81°F. As December arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 53 mm to 21 mm. It feels drier, as humidity decreases from 80% to 79%. The average wind speed doesn’t change much during December, staying around 0 m/s. The good news is there are likely to be more sunny days in December, from 10 to 15.
January brings much the same weather, it remains good.
Wind
The average wind speed is 1 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Chiang Rai is gradually decreasing during December, going from 1 m/s to 0 m/s over the course of the month.
Rain
How was the weather last December in Chiang Rai?
Climate Change Over the Years
The climate in Chiang Rai in December has not changed that much over the last 43 years.
The average temperature was the lowest in 1999 (+86°F) and the highest in 2010 (+90°F). The driest year was 2019 with only 1196 mm of rainfall, and the wettest year was 2022 with 3394 mm.
FAQ
Is December a good time to visit Chiang Rai?
Can you sunbathe in Chiang Rai in December?
Is Chiang Rai rainy in December?
Is it sunny in Chiang Rai in December?
Other cities in Thailand
Monthly weather in Chiang Rai
Source of the data
For this page, we’ve looked at the typical weather in Chiang Rai, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
