December Weather in Si Chiang Mai, Thailand

Last updated: August 27, 2025

In December, the average temperature in Si Chiang Mai, Thailand is a pleasant 23°C (74°F). However, temperatures can vary significantly, with minimums dipping to 9°C (48°F) and maximums soaring to 35°C (95°F). Expect some light rain, as the area receives about 7 mm (0.3 in) of precipitation over 1 day, while the average humidity hovers around 57%. Enjoy the diverse weather during this vibrant month!

December Temperature in Si Chiang Mai

In December in Si Chiang Mai, the average temperature is 23°C (74°F). Maximums can reach 35°C (95°F), and minimums can be as low as 9°C (48°F). This makes Si Chiang Mai a great destination for travelers seeking a comfortable climate to explore outdoor activities and enjoy the local scenery.

December Weather in Si Chiang Mai: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Si Chiang Mai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Si Chiang Mai, December typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (95°F) and lows dropping to around 9°C (48°F).

Data source: Temperature data for Si Chiang Mai generated using information from the Copernicus Climate Change Service.

December Precipitation in Si Chiang Mai

In Si Chiang Mai in December, the precipitation amount is 7 mm (0.3 in) over the course of 1 day.

December Precipitation Trends in Si Chiang Mai

The chart displays monthly precipitation patterns in Si Chiang Mai, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Si Chiang Mai, December typically receives around 7 mm (0.3 inches) of precipitation spread over approximately 1 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Si Chiang Mai

In Si Chiang Mai in December humidity is 57%. With an average temperature of 23°C (74°F), this humidity feels like a warm embrace, creating a comfortable environment for exploring the local sights and enjoying outdoor activities.

December Average Humidity in Si Chiang Mai

This chart illustrates the average monthly humidity levels in Si Chiang Mai, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Si Chiang Mai is approximately 57%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Si Chiang Mai

In Si Chiang Mai in December, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Si Chiang Mai.

Maximum UV Index Levels in Si Chiang Mai for December

The chart shows the monthly maximum UV Index (UVI) for Si Chiang Mai in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Si Chiang Mai typically reaches 8, which falls under the very high exposure category.

Data source: Si Chiang Mai December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How December Weather in Si Chiang Mai Compares to Other Months

Weather in Si Chiang Mai varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Si Chiang Mai, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Si Chiang Mai, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (75°F)	6 mm (0.2 inches)	52%	very high
February Weather	25°C (76°F)	17 mm (0.7 inches)	49%	extreme
March Weather	28°C (82°F)	41 mm (1.6 inches)	39%	extreme
April Weather	29°C (85°F)	70 mm (2.8 inches)	40%	extreme
May Weather	29°C (85°F)	204 mm (8.0 inches)	69%	extreme
June Weather	29°C (85°F)	309 mm (12.2 inches)	81%	extreme
July Weather	29°C (84°F)	331 mm (13.0 inches)	83%	extreme
August Weather	28°C (83°F)	402 mm (15.8 inches)	87%	extreme
September Weather	28°C (83°F)	265 mm (10.4 inches)	86%	extreme
October Weather	28°C (82°F)	129 mm (5.1 inches)	74%	extreme
November Weather	26°C (79°F)	10 mm (0.4 inches)	63%	very high
December Weather	23°C (74°F)	7 mm (0.3 inches)	57%	very high