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December Weather in Chiang Muan, Thailand

Last updated: August 27, 2025

In December, the average temperature in Chiang Muan, Thailand is a pleasant 21°C (71°F), with minimums dipping to 7°C (45°F) and maximums reaching up to 33°C (91°F). Expect a moderate precipitation of 18 mm (0.7 in) over approximately 3 days. With an average humidity of 60%, it's a month that balances warmth and refreshing breezes.

December Temperature in Chiang Muan

In December in Chiang Muan, the average temperature is 21°C (71°F), with maximums reaching 33°C (91°F) and minimums dipping to as low as 7°C (45°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy outdoor activities.

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

The chart illustrates December temperature patterns in Chiang Muan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chiang Muan, December typically has an average temperature of 21°C (71°F), with highs reaching up to 33°C (91°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec717481828282818080797670
Data source: Temperature data for Chiang Muan 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 Chiang Muan

In Chiang Muan in December, the precipitation amount is 18 mm (0.7 in) over a span of 3 days.

December Precipitation Trends in Chiang Muan

The chart displays monthly precipitation patterns in Chiang Muan, 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 Chiang Muan, December typically receives around 18 mm (0.7 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec281371301492223003352351492518
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Chiang Muan

In Chiang Muan in December humidity is 60%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace, making it mildly uncomfortable for traveling, but still perfect for enjoying outdoor activities with a light breeze to keep you refreshed.

December Average Humidity in Chiang Muan

This chart illustrates the average monthly humidity levels in Chiang Muan, 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 Chiang Muan is approximately 60%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec57%53%45%39%66%79%90%92%85%72%64%60%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Chiang Muan

In Chiang Muan 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 Chiang Muan.

Maximum UV Index Levels in Chiang Muan for December

The chart shows the monthly maximum UV Index (UVI) for Chiang Muan 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 Chiang Muan typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9101313141314141413108
Data source: Chiang Muan 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 Chiang Muan Compares to Other Months

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

This table compares monthly weather conditions in Chiang Muan, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather22°C (72°F)27 mm (1.1 inches)57%very high
February Weather24°C (75°F)13 mm (0.5 inches)53%very high
March Weather27°C (81°F)7 mm (0.3 inches)45%extreme
April Weather28°C (83°F)130 mm (5.1 inches)39%extreme
May Weather28°C (83°F)149 mm (5.9 inches)66%extreme
June Weather28°C (82°F)222 mm (8.7 inches)79%extreme
July Weather27°C (81°F)300 mm (11.8 inches)90%extreme
August Weather27°C (80°F)335 mm (13.2 inches)92%extreme
September Weather27°C (80°F)235 mm (9.3 inches)85%extreme
October Weather26°C (79°F)149 mm (5.9 inches)72%extreme
November Weather24°C (76°F)25 mm (1.0 inches)64%very high
December Weather21°C (71°F)18 mm (0.7 inches)60%very high

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