December Weather in Rayong, Thailand

Last updated: August 27, 2025

In December, Rayong, Thailand experiences a delightful blend of warm weather and occasional rainfall, making it an inviting destination for travelers. The average temperature hovers around 27°C (80°F), with peaks reaching up to 34°C (94°F) during the day. As the sun sets, temperatures can drop to a cooler 17°C (62°F). While precipitation is moderate at 36 mm (1.4 in) over five days, the humidity level remains around 70%, contributing to a tropical atmosphere. This month offers visitors a vibrant experience, balancing sunshine with refreshing showers.

December Temperature in Rayong

In December, Rayong, Thailand, experiences a delightful dip in temperatures as the year draws to a close. The month starts with a refreshing minimum of 17°C (62°F), providing a cool reprieve from the warmer months. The average temperature settles at a comfortable 27°C (80°F), making it an ideal time for outdoor activities and beach visits. While daytime highs can still reach up to 34°C (94°F), the cooler evenings create a pleasant atmosphere for relaxation. As December rolls in, locals and visitors alike can enjoy a perfect balance of warmth and coolness, distinguishing this month from the hotter summer months that precede it.

December Weather in Rayong: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Rayong, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rayong, December typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec808183838484838382828180
Data source: Temperature data for Rayong generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Rayong

In December, Rayong, Thailand experiences a notable shift in precipitation patterns, with rainfall dropping to 36 mm (1.4 in) over just 5 days. This marks a significant decline from the peak wet months of May through October, where the region sees substantial downpours. While still slightly above the lighter early months like January and February, December’s precipitation reflects a transitional phase, as the region moves away from the heavy monsoon season. This dip in rainfall not only signifies the end of a wet cycle but also hints at the drier season ahead, offering a brief respite before the cycle begins anew in the following year.

December Precipitation Trends in Rayong

The chart displays monthly precipitation patterns in Rayong, 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 Rayong, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec3530781582392112262233222937136
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rayong

In Rayong, Thailand, the humidity levels display a notable upward trend as the year progresses, particularly peaking during the summer months. Starting at a comfortable 59% in January, humidity gradually rises through the spring, reaching 70% by April as the heat begins to intensify. The summer months bring significant increases, with readings soaring to a sultry 88% in August. As the year winds down, December sees a refreshing drop to 70%, mirroring the earlier months but hinting at the lingering warmth of the tropical climate. This cyclical pattern underscores the region's characteristic humidity, punctuated by a late-year retreat, making Rayong a truly humid subtropical haven.

December Average Humidity in Rayong

This chart illustrates the average monthly humidity levels in Rayong, 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 Rayong is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec59%58%61%70%80%85%86%88%87%83%78%70%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rayong

In Rayong, Thailand, the UV Index sees a notable trend throughout the year, with December reflecting a UV Index of 10, categorized as very high, allowing for a burn time of just 15 minutes. As the year progresses from December to March, the UV Index escalates dramatically, peaking at 14 during the hottest months. This extreme intensity demands vigilant sun protection, with burn times reduced to a mere 10 minutes across several months, notably from February through October. As the year winds down, the return to a slightly lower index in December serves as a reminder of the importance of sun safety year-round. For more detailed information, visit Rayong UV Index.

Maximum UV Index Levels in Rayong for December

The chart shows the monthly maximum UV Index (UVI) for Rayong 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 Rayong typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec101314141413141414131110
Data source: Rayong 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.

December Sunshine in Rayong

In December, Rayong, Thailand, basks in 312 hours of glorious sunshine, perfectly capping off a year that showcases a charming ebb and flow of daylight. Following the slightly higher totals in November, there’s a noticeable warmth that carries into this festive month. The sunshine hours reflect a decline from the peak experienced in March (334 hours), yet remain robust, ensuring plenty of sun-kissed enjoyment for both locals and tourists. Interestingly, December’s light mirrors the vibrancy of April and May, indicating that while the year ends, the sun continues to shine generously, setting a delightful stage for holiday cheer and outdoor adventures. Time spent under the sun in Rayong creates a shimmering backdrop that beautifully contrasts with the cooler winter months in many other parts of the world.

Monthly Sunshine Duration in Rayong: December Highlighted

The December sunshine duration represents the total number of hours Rayong experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec251h297h334h312h303h286h268h273h246h268h295h312h
Data source: Rayong December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Rayong During December

In December, Rayong, Thailand, offers a promising 55% chance of sunny weather, making it a delightful time for visitors seeking warmth and sunshine. This figure reflects a notable increase from the preceding months, where the likelihood of clear skies dwindles significantly, particularly in the summer when it drops as low as 9% in August. While the weather in December isn't as sunny as the early months of the year, like February with its 66% chance, it stands out as a favorable option for enjoying the outdoors before the intense heat of April arrives. Overall, December presents a wonderful opportunity to bask in the sun amidst the enchanting landscapes of Rayong.

Percentage of Sunny Days in December in Rayong

The chart illustrates the percentage of sunny days in Rayong throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Rayong experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec54%66%49%17%29%19%13%9%7%11%22%55%
Data source: Rayong December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Rayong in December

In Rayong, Thailand, the daylight duration showcases a subtle yet consistent rhythm throughout the year. From January to November, the hours of sunlight remain relatively stable, fluctuating between 11 and 12 hours. Notably, the days begin to stretch in March, peaking with 12 hours of daylight from March through August, allowing ample time for exploration and outdoor activities. As the year draws to a close, daylight diminishes back to 11 hours in December, reminiscent of the winter months. This steady pattern reflects the region’s tropical climate, where the variations in daylight are less pronounced, creating an inviting atmosphere for both residents and visitors.

Average Daylight Hours in Rayong for December

The chart illustrates the variation in daylight duration in Rayong throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 27m11h 42m12h 3m12h 24m12h 42m12h 51m12h 46m12h 30m12h 10m11h 49m11h 31m11h 22m
Data source: Rayong daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Rayong

As December rolls into Rayong, Thailand, the average wind speed picks up to 3.0 m/s (7 mph), creating a refreshing breeze that contrasts with the milder gusts of preceding months. This shift marks a notable increase compared to the winds of previous months, particularly from April to November, where speeds lingered around 2.0 to 2.8 m/s. The upward trend in wind velocity towards the year’s end not only invigorates the coastal atmosphere but also hints at the transition to the more breezy and cooler months ahead. December's winds serve as a reminder of the dynamic and shifting nature of Rayong's climate, providing both locals and visitors a delightful experience as they enjoy the pleasant outdoor scenery.

Average December Wind Speed in Rayong

The chart displays monthly wind speed patterns in Rayong, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.82.32.42.02.33.23.22.92.32.52.73.0 m/s
Data source: Rayong December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Rayong Compares to Other Months

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

In December, temperatures in Rayong typically range from a minimum of 17°C (62°F) to a maximum of 34°C (94°F), with an average temperature of 27°C (80°F). The month sees about 36 mm (1.4 in) of precipitation over approximately 5 days, accompanied by high humidity at 70%. In contrast, January maintains a similar temperature profile, with a minimum of 17°C (63°F), an average of 27°C (81°F), and a maximum of 34°C (93°F). However, January experiences slightly lower precipitation at 35 mm (1.4 in) spread over 7 days and reduced humidity, dropping to 59%. For a detailed look at the weather conditions in January, check Rayong weather in January.

In December, the weather features a warm minimum temperature of 17°C (62°F) and an average of 27°C (80°F), peaking at a maximum of 34°C (94°F). The month sees about 36 mm (1.4 in) of precipitation over five days, coupled with a humidity level of 70%. In contrast, February brings slightly warmer nights with a minimum temperature of 19°C (66°F), while maintaining an average of 27°C (81°F) and a similar maximum of 34°C (93°F). Precipitation decreases to 30 mm (1.2 in) but occurs over more days, totaling seven, and humidity drops to a more comfortable 58%. For more detailed information, check out Rayong weather in February.

In December, the weather is characterized by a range of temperatures from a minimum of 17°C (62°F) to a maximum of 34°C (94°F), with an average temperature of about 27°C (80°F). The month sees a moderate level of precipitation at 36 mm (1.4 in) over approximately 5 days and maintains a humidity level of 70%.

In contrast, March experiences slightly warmer temperatures, with minimums of 23°C (73°F) and a more consistent average temperature of 28°C (83°F), peaking at the same maximum of 34°C (93°F) as December. However, March is notably wetter, with 78 mm (3.1 in) of rainfall distributed over 15 days, and the humidity drops to 61%.

For more specific details about March weather in Rayong, you can check this link: Rayong weather in March.

When comparing the weather in December and April, it is clear that both months have relatively warm temperatures but differ significantly in precipitation. In December, temperatures range from a minimum of 17°C (62°F) to a maximum of 34°C (94°F), with an average of 27°C (80°F). The month experiences moderate rainfall with 36 mm (1.4 in) over about 5 days, resulting in a comfortable humidity level of 70%.

In contrast, April sees slightly higher temperatures, with a minimum of 19°C (66°F), an average of 29°C (84°F), and a maximum of 35°C (95°F). However, the month is much wetter, recording 158 mm (6.2 in) of rain spread across approximately 20 days, while maintaining the same humidity level of 70%. This significant difference in rainfall makes April a much wetter month compared to December. For more detailed information about the weather in April, you can visit Rayong weather in April.

In December, the weather tends to be warm and relatively dry, with temperatures ranging from a minimum of 17°C (62°F) to a maximum of 34°C (94°F) and an average of 27°C (80°F). With only 36 mm (1.4 in) of precipitation over about 5 days, humidity levels stand at a comfortable 70%. In contrast, May experiences higher humidity at 80% and significantly more rainfall, with total precipitation reaching 239 mm (9.4 in) over approximately 24 days. The temperature in May also rises slightly, with minimums around 22°C (71°F), averages of 29°C (84°F), and maximums peaking at 35°C (95°F). For a more detailed look at the weather patterns, you can check Rayong weather in May.

The weather in December is generally milder compared to June, with temperatures ranging from a minimum of 17°C (62°F) to a maximum of 34°C (94°F) and an average of 27°C (80°F). With only 36 mm (1.4 in) of precipitation over about five days, December experiences significantly less rainfall than June. In contrast, June is warmer, with minimum temperatures around 25°C (77°F) and an average of 29°C (84°F), but it can be considerably wetter, receiving 211 mm (8.3 in) of rain across 24 days, leading to higher humidity levels at 85%. For more details on Rayong's weather in June, you can visit Rayong weather in June.

December and July in Rayong present distinct weather patterns that significantly affect the overall climate experience. In December, temperatures range from a minimum of 17°C (62°F) to a maximum of 34°C (94°F), with an average of 27°C (80°F). The month receives relatively low precipitation, totaling 36 mm (1.4 in) over just 5 days, alongside a humidity level of 70%.

In contrast, July is warmer, with minimum temperatures starting at 25°C (77°F) and averaging 28°C (83°F), while still reaching a high of 34°C (94°F). However, it experiences much heavier rainfall, accumulating 226 mm (8.9 in) over 26 days and a higher humidity level of 86%. For more detailed information about the weather patterns in July, check out Rayong weather in July.

When comparing the weather in December and August, distinct differences emerge. December enjoys milder temperatures with a minimum of 17°C (62°F) and an average high of 34°C (94°F), alongside relatively low precipitation of 36 mm (1.4 in) over just 5 days, and humidity at 70%. In contrast, August presents a warmer profile with temperatures ranging from a minimum of 24°C (76°F) to a maximum of 34°C (93°F), but it is characterized by substantial rainfall, accumulating 223 mm (8.8 in) over 26 days and higher humidity levels of 88%. For more details on August weather, please refer to Rayong weather in August.

When comparing the weather between December and September, notable differences emerge in both temperature and precipitation. December tends to be milder, with temperatures ranging from a minimum of 17°C (62°F) to a maximum of 34°C (94°F), and an average of 27°C (80°F). In contrast, September sees more consistent warmth, with minimum temperatures at 24°C (75°F) and an average of 28°C (82°F). However, September is significantly wetter, receiving 322 mm (12.7 in) of rain over 26 days, compared to December's 36 mm (1.4 in) across just 5 days. Additionally, the humidity in September is higher at 87%, while December has a more comfortable 70%. For a more detailed look at September's weather, you can visit Rayong weather in September.

When comparing December and October weather, December tends to be slightly cooler, with average temperatures ranging from a minimum of 17°C (62°F) to a maximum of 34°C (94°F), while October maintains a warmer minimum of 23°C (73°F) and an average maximum of 34°C (93°F). October also experiences significantly higher precipitation, with 293 mm (11.5 in) falling over 24 days compared to December's 36 mm (1.4 in) over just 5 days. Additionally, humidity levels are generally higher in October at 83%, compared to December's 70%. For more details, you can check Rayong weather in October.

In comparing the weather between December and November, December tends to be slightly cooler, with a minimum temperature of 17°C (62°F) compared to November's milder minimum of 22°C (72°F). Both months share an average temperature of around 27°C (81°F), while the maximum temperatures remain the same at 34°C (94°F). Notably, December experiences significantly less rainfall, with only 36 mm (1.4 in) over 5 days, whereas November sees 71 mm (2.8 in) spread across 11 days. Additionally, humidity levels are higher in November at 78%, compared to 70% in December, making November feel somewhat more muggy. For more details, you can check Rayong weather in November.

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Conclusion: What to Expect From December Weather in Rayong

December in Rayong offers a refreshing change compared to the rest of the year. With milder temperatures and lower humidity, the month provides a perfect escape from the sweltering heat typical of other months. Although precipitation levels see a slight uptick, the average rainfall is relatively low, ensuring plenty of sun-kissed days. This combination of comfortable temperatures and refreshing breezes makes December an ideal time for outdoor activities without the oppressive humidity. For more insights into Rayong's climate patterns, visit Rayong Climate.