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December Weather in Tan Sum, Thailand

Last updated: August 27, 2025

The average temperature in Tan Sum, Thailand during December is a pleasant 25°C (77°F). However, temperatures can vary, with lows of 14°C (58°F) and highs reaching 34°C (94°F). Expect a modest precipitation of 7 mm (0.3 in) spread over just 1 day and an average humidity level of 82%.

December Temperature in Tan Sum

In December in Tan Sum, the average temperature is a pleasant 25°C (77°F). Maximums can reach a hot 34°C (94°F), while minimums can dip to a cool 14°C (58°F). This makes it an ideal time for travelers seeking a comfortable climate for outdoor activities and exploration.

December Weather in Tan Sum: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Tan Sum, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tan Sum, December typically has an average temperature of 25°C (77°F), with highs reaching up to 34°C (94°F) and lows dropping to around 14°C (58°F).
JanFebMarAprMayJunJulAugSepOctNovDec777984858584828282817977
Data source: Temperature data for Tan Sum generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Tan Sum

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

December Precipitation Trends in Tan Sum

The chart displays monthly precipitation patterns in Tan Sum, 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 Tan Sum, December typically receives around 7 mm (0.3 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec552877168201311319322194477
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Tan Sum

In Tan Sum in December, humidity is 82%. With an average temperature of 25°C (77°F), this humidity feels like a warm, oppressive blanket enveloping you as you explore, making every step feel more laborious and prompting the need for frequent hydration breaks.

December Average Humidity in Tan Sum

This chart illustrates the average monthly humidity levels in Tan Sum, 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 Tan Sum is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%65%53%49%73%86%91%93%91%88%85%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Tan Sum

In Tan Sum 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 Tan Sum.

Maximum UV Index Levels in Tan Sum for December

The chart shows the monthly maximum UV Index (UVI) for Tan Sum 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 Tan Sum typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10131414151315141412109
Data source: Tan Sum 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 Tan Sum Compares to Other Months

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

This table compares monthly weather conditions in Tan Sum, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)5 mm (0.2 inches)74%very high
February Weather26°C (79°F)5 mm (0.2 inches)65%extreme
March Weather29°C (85°F)28 mm (1.1 inches)53%extreme
April Weather29°C (85°F)77 mm (3.0 inches)49%extreme
May Weather29°C (85°F)168 mm (6.6 inches)72%extreme
June Weather29°C (84°F)201 mm (7.9 inches)86%extreme
July Weather28°C (83°F)311 mm (12.2 inches)91%extreme
August Weather28°C (82°F)319 mm (12.5 inches)93%extreme
September Weather28°C (82°F)322 mm (12.7 inches)91%extreme
October Weather27°C (81°F)194 mm (7.6 inches)88%extreme
November Weather26°C (80°F)46 mm (1.8 inches)85%very high
December Weather25°C (77°F)7 mm (0.3 inches)82%very high

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