December Weather in Si Thep, Thailand

Last updated: August 27, 2025

In December, the average temperature in Si Thep, Thailand reaches a pleasant 26°C (79°F). Expect a range where the minimum dips to 13°C (56°F) and the maximum can soar up to 35°C (96°F). Rainfall is modest, with an average precipitation of 7 mm (0.3 in) over just 1 day, while the air maintains a comfortable average humidity of 59%.

December Temperature in Si Thep

In December in Si Thep, the average temperature is 26°C (79°F). Maximums can reach up to 35°C (96°F), while minimums can drop as low as 13°C (56°F). This makes Si Thep an ideal destination for travelers looking to enjoy warm weather with a pleasant chill in the evenings.

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

The chart illustrates December temperature patterns in Si Thep, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Si Thep, December typically has an average temperature of 26°C (79°F), with highs reaching up to 35°C (96°F) and lows dropping to around 13°C (56°F).

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

December Precipitation in Si Thep

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

December Precipitation Trends in Si Thep

The chart displays monthly precipitation patterns in Si Thep, 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 Thep, 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 Thep

In Si Thep in December humidity is 59%. With average temperature 26°C (79°F), this humidity feels like a warm embrace that clings to your skin, making outdoor adventures feel sultry yet inviting as you explore the vibrant sights and sounds of the area.

December Average Humidity in Si Thep

This chart illustrates the average monthly humidity levels in Si Thep, 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 Thep is approximately 59%, 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 Thep

In Si Thep in December, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Si Thep.

Maximum UV Index Levels in Si Thep for December

The chart shows the monthly maximum UV Index (UVI) for Si Thep 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 Thep typically reaches 9, which falls under the very high exposure category.

Data source: Si Thep 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 Thep Compares to Other Months

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

This table compares monthly weather conditions in Si Thep, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (80°F)	7 mm (0.3 inches)	50%	very high
February Weather	27°C (82°F)	18 mm (0.7 inches)	47%	extreme
March Weather	30°C (86°F)	30 mm (1.2 inches)	41%	extreme
April Weather	30°C (87°F)	83 mm (3.3 inches)	51%	extreme
May Weather	30°C (86°F)	130 mm (5.1 inches)	76%	extreme
June Weather	30°C (86°F)	159 mm (6.3 inches)	83%	extreme
July Weather	29°C (84°F)	245 mm (9.6 inches)	80%	extreme
August Weather	28°C (83°F)	266 mm (10.5 inches)	85%	extreme
September Weather	28°C (83°F)	251 mm (9.9 inches)	88%	extreme
October Weather	28°C (83°F)	177 mm (7.0 inches)	79%	extreme
November Weather	27°C (82°F)	15 mm (0.6 inches)	68%	very high
December Weather	26°C (79°F)	7 mm (0.3 inches)	59%	very high