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December Weather in Si Wilai, Thailand

Last updated: August 27, 2025

In Si Wilai, Thailand, the average temperature in December is a pleasant 22°C (72°F), with temperatures ranging from a cool 9°C (48°F) to a warm 35°C (95°F). You can expect minimal precipitation, averaging 3 mm (0.1 in) over just 1 day, and a comfortable average humidity of 69%.

December Temperature in Si Wilai

In December, in Si Wilai, the average temperature is 22°C (72°F). The maximum can reach 35°C (95°F), while the minimum can be as low as 9°C (48°F). This makes it a comfortable time to visit, ideal for outdoor activities and exploring the local sights.

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

The chart illustrates December temperature patterns in Si Wilai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Si Wilai, December typically has an average temperature of 22°C (72°F), with highs reaching up to 35°C (95°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec737581848483828282817872
Data source: Temperature data for Si Wilai 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 Si Wilai

In Si Wilai in December, the precipitation amount is 3 mm (0.1 in) over the course of 1 day.

December Precipitation Trends in Si Wilai

The chart displays monthly precipitation patterns in Si Wilai, 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 Wilai, December typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec7124271241362510506279132163
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Si Wilai

In Si Wilai in December, humidity is 69%. With an average temperature of 22°C (72°F), this humidity feels like a warm, enveloping blanket, making travel feel sticky and slightly oppressive, yet also invigorating as the air is thick with the scent of blooming flora and vibrant surroundings.

December Average Humidity in Si Wilai

This chart illustrates the average monthly humidity levels in Si Wilai, 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 Wilai is approximately 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec65%63%54%47%67%81%92%93%85%78%73%69%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Si Wilai

In Si Wilai 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 Wilai.

Maximum UV Index Levels in Si Wilai for December

The chart shows the monthly maximum UV Index (UVI) for Si Wilai 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 Wilai typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9111314141314141412108
Data source: Si Wilai 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 Wilai Compares to Other Months

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

This table compares monthly weather conditions in Si Wilai, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (73°F)7 mm (0.3 inches)65%very high
February Weather24°C (75°F)12 mm (0.5 inches)63%extreme
March Weather27°C (81°F)42 mm (1.7 inches)54%extreme
April Weather29°C (84°F)70 mm (2.8 inches)47%extreme
May Weather29°C (84°F)241 mm (9.5 inches)67%extreme
June Weather28°C (83°F)362 mm (14.3 inches)81%extreme
July Weather28°C (82°F)510 mm (20.1 inches)92%extreme
August Weather28°C (82°F)506 mm (19.9 inches)93%extreme
September Weather28°C (83°F)279 mm (11.0 inches)85%extreme
October Weather27°C (81°F)132 mm (5.2 inches)78%extreme
November Weather25°C (78°F)16 mm (0.6 inches)73%very high
December Weather22°C (72°F)3 mm (0.1 inches)69%very high

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