January Weather in Ratchaburi, Thailand

Last updated: August 27, 2025

January in Ratchaburi, Thailand brings a delightful blend of warmth and mildness, with temperatures peaking at a maximum of 34°C (94°F) and cooling to an average of 26°C (80°F). Nighttime reveals a cooler side with a minimum temperature of 16°C (61°F), offering a refreshing respite. This month is relatively dry, featuring 21 mm (0.8 in) of rainfall over just three days, accompanied by a comfortable humidity level of 58%. Ideal for outdoor activities, January invites visitors to explore the vibrant landscape and culture of Ratchaburi while enjoying pleasant weather.

January Temperature in Ratchaburi

In Ratchaburi, Thailand, January offers a delightful blend of cool mornings and warm afternoons, with temperatures ranging from a refreshing 16°C (61°F) at night to a comfortable 34°C (94°F) during the day, averaging around 26°C (80°F). As the month progresses into February, a gradual warming trend begins, with minimum temperatures rising to 19°C (67°F) and peak temperatures reaching 36°C (97°F). This pattern of increasing warmth continues into the spring months, where by April and May, highs soar to an intense 40°C (104°F). Though January is cooler compared to the hotter months ahead, it serves as a pleasant precursor to the rising heat, marking the transition from the cooler dry season into Thailand’s sweltering summer.

January Weather in Ratchaburi: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Ratchaburi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ratchaburi, January 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).
JanFebMarAprMayJunJulAugSepOctNovDec798185878685848483828179
Data source: Temperature data for Ratchaburi 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.

January Precipitation in Ratchaburi

January in Ratchaburi, Thailand, marks the beginning of the year with relatively low precipitation, recording just 21 mm (0.8 in) over 3 days. As the months progress into February and March, rainfall remains sparse, but a noticeable uptick occurs in April, reaching 88 mm (3.5 in) as the onset of the rainy season begins. This trend continues dramatically into the summer months, with May peaking at 141 mm (5.5 in) and June following closely with 125 mm (4.9 in), setting the stage for Ratchaburi's wettest months. As rainfall accumulates, the number of precipitation days increases significantly, starkly contrasting January's dry days. By the time September arrives, the city experiences the highest monthly rainfall of 209 mm (8.2 in) across 24 days, illustrating a clear shift from the dry tranquility of January to a lush, vibrant landscape as the seasons change.

January Precipitation Trends in Ratchaburi

The chart displays monthly precipitation patterns in Ratchaburi, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Ratchaburi, January typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec211230881411251201672092028317
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Ratchaburi

In January, Ratchaburi, Thailand, experiences a moderate humidity level of 58%, making it one of the drier months of the year. As the seasons transition into February and March, humidity begins to rise slightly, reaching 59% and 62% respectively, signaling the approach of the warmer months ahead. By April, the humidity climbs to 69%, and the trend continues upward as May, June, and July bring a notable increase, with humidity peaking at 89% in July. This high humidity persists through August and September, before gradually tapering off in the subsequent months, with October at 83% and closing the year in December with a more comfortable 66%. Overall, the data reveals a distinct upward trajectory in humidity as the year progresses towards the monsoon season, making early January an ideal time to visit for those seeking a less humid climate.

January Average Humidity in Ratchaburi

This chart illustrates the average monthly humidity levels in Ratchaburi, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Ratchaburi is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec58%59%62%69%79%87%89%90%87%83%77%66%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Ratchaburi

In January, Ratchaburi experiences a notably high UV Index of 11, categorizing it as extreme and indicating a burn time of just 10 minutes. This intensity reflects a trend that continues into February, where the UV Index rises slightly to 12. As the months progress, Ratchaburi maintains this extreme exposure, reaching levels of 14 in March through July, with no change in burn time. The intensity remains consistent before a slight dip in November and December, where the UV Index drops to 10 and 9, respectively, yet still maintains a very high classification. This data underscores the significance of sun safety throughout the year, particularly in peak months. For a detailed examination of the UV index trends, visit Ratchaburi UV Index.

Maximum UV Index Levels in Ratchaburi for January

The chart shows the monthly maximum UV Index (UVI) for Ratchaburi in January, 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 January, the maximum UV index in Ratchaburi typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11121414141314141313109
Data source: Ratchaburi January 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.

January Sunshine in Ratchaburi

In January, Ratchaburi, Thailand, basks under 251 hours of sunshine, setting the stage for a vibrant start to the year. As the month transitions to February, the sunlight increases dramatically to 299 hours, hinting at the warmth that will soon envelop the region. By March, the sun-drenched days peak with 333 hours, marking the highlight of the sunshine months. April and May maintain this brightness with 319 and 317 hours, respectively, before gradually tapering off as the rainy season approaches. June still enjoys 300 hours, but July and August see a dip, with 280 and 267 hours of sunshine, respectively. However, as the year draws to a close, October brings back 283 hours, followed by 293 hours in November and a robust 315 hours in December. Thus, Ratchaburi's sunshine graph reflects a fascinating ebb and flow, illustrating a dynamic interplay between the dry and wet seasons, culminating in a golden finale as the year ends.

Monthly Sunshine Duration in Ratchaburi: January Highlighted

The January sunshine duration represents the total number of hours Ratchaburi experiences direct sunlight during the month of January, excluding cloudy or obstructed periods. This chart compares the sunshine duration of January with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec251h299h333h319h317h300h280h267h260h283h293h315h
Data source: Ratchaburi January Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Ratchaburi During January

In Ratchaburi, Thailand, January brings a promising 62% chance of sunny weather, making it one of the more favorable months for sunshine in the region. This month stands out compared to the heavier rainy months that follow, as seen in April and July, where sunny days dwindle to just 18% and 10%, respectively. Interestingly, the likelihood of sunshine peaks again in February at 77%, before dipping slightly in March. The trend showcases a consistent pattern of sunny weather during the early part of the year, providing a perfect opportunity for outdoor activities before the moisture-laden clouds roll in later. Overall, January's blend of warmth and sunlight sets the stage for a delightful start to the year in this vibrant locale.

Percentage of Sunny Days in January in Ratchaburi

The chart illustrates the percentage of sunny days in Ratchaburi throughout the year, with January 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 Ratchaburi experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec62%77%59%18%31%16%11%8%8%14%26%62%
Data source: Ratchaburi January chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Ratchaburi in January

In January, Ratchaburi, Thailand enjoys a balanced 11 hours of daylight, a trend that continues through February. As spring approaches in March, daylight extends to 12 hours, a duration that remains consistent from April through August. This steady stretch of sunlight enhances the vibrant atmosphere during the peak of the dry season. However, as autumn unfolds, daylight gradually decreases to 11 hours once again in October, maintaining this length through December. This cyclical pattern of daylight not only influences the local climate but also enriches the region's natural beauty throughout the year.

Average Daylight Hours in Ratchaburi for January

The chart illustrates the variation in daylight duration in Ratchaburi throughout the year, with January highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 24m11h 41m12h 2m12h 25m12h 44m12h 53m12h 49m12h 32m12h 10m11h 48m11h 29m11h 19m
Data source: Ratchaburi daylight hours, calculated by summing the hours between sunrise and sunset for each day.

January Winds in Ratchaburi

In January, Ratchaburi experiences a gentle breeze with an average wind speed of 2.1 m/s (5 mph), setting the stage for a pleasant start to the year. As the month transitions into February, the winds ease slightly to 2.0 m/s, maintaining the tranquil atmosphere. However, by March, the winds pick up again, reaching 2.2 m/s, hinting at a gradual increase in breezy conditions. This trend continues through the following months, peaking in December at 2.4 m/s, which contrasts with the 1.6 m/s lull experienced in April. Overall, January's winds offer a consistent and inviting backdrop, reflective of the region's mild January climate, before leading into a pattern of gentle fluctuations as spring approaches.

Average January Wind Speed in Ratchaburi

The chart displays monthly wind speed patterns in Ratchaburi, with values for each month shown alongside January's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how January's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.1 m/s2.02.21.61.82.22.22.01.51.72.12.4
Data source: Ratchaburi January wind data, generated using information from the Copernicus Climate Change Service.

How January Weather in Ratchaburi Compares to Other Months

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

In January, the weather typically features a minimum temperature of 16°C (61°F), an average of 26°C (80°F), and a maximum of 34°C (94°F), along with 21 mm (0.8 in) of precipitation over 3 days at a humidity level of 58%. In contrast, February sees slightly warmer conditions, with a minimum of 19°C (67°F), an average of 27°C (82°F), and a peak temperature of 36°C (97°F). Precipitation decreases to 12 mm (0.5 in) over just 2 days, while humidity rises slightly to 59%. For more detailed insights, you can check Ratchaburi weather in February.

In January, the weather in Ratchaburi features a minimum temperature of 16°C (61°F) and an average of 26°C (80°F), with maximums reaching 34°C (94°F). The month sees relatively low precipitation at 21 mm (0.8 in) over three days and has a humidity level of 58%.

By March, the temperatures increase, with a minimum of 21°C (70°F) and an average of 30°C (86°F), peaking at a scorching 38°C (102°F). Precipitation also rises to 30 mm (1.2 in), occurring over four days, with humidity slightly higher at 62%. These changes mark a significant transition from the milder January temperatures to the hotter and more humid conditions typical of March. For more detailed information, check out Ratchaburi weather in March.

In January, the weather in Ratchaburi is relatively mild with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 34°C (94°F), accompanied by low precipitation totaling 21 mm (0.8 in) over just 3 days. The humidity sits at a comfortable 58%, making it a pleasant time of year. In contrast, April sees a significant increase in temperatures, with minimums at 21°C (70°F) and maximums soaring up to 40°C (104°F). This month also experiences much higher precipitation, totaling 88 mm (3.5 in) over 11 days, and a rise in humidity to 69%, creating a much more tropical atmosphere. For more detailed information, you can visit Ratchaburi weather in April.

In January, Ratchaburi experiences a milder climate with average temperatures ranging from 16°C (61°F) to a maximum of 34°C (94°F). The month sees only a modest amount of precipitation, totaling 21 mm (0.8 in) over about three days, and the humidity is relatively comfortable at 58%. In contrast, May is much hotter and more humid, featuring minimum temperatures of 24°C (75°F) and soaring averages up to 40°C (105°F). With substantial rainfall of 141 mm (5.5 in) spread over 20 days, the humidity rises significantly to 79%. For more detailed information, check out Ratchaburi weather in May.

In January, the weather in Ratchaburi is characterized by a relatively mild climate, with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 34°C (94°F) and an average of 26°C (80°F). The month sees minimal precipitation, averaging only 21 mm (0.8 in) over about 3 days, accompanied by a moderate humidity level of 58%.

In contrast, June presents a much warmer and wetter scenario, with temperatures fluctuating between a minimum of 25°C (77°F) and a maximum of 38°C (100°F), and an average temperature of 30°C (85°F). This month experiences significantly higher precipitation, totaling 125 mm (4.9 in) across approximately 21 days, coupled with increased humidity at 87%. For more detailed information, you can check out Ratchaburi weather in June.

In January, Ratchaburi experiences mild temperatures with a minimum of 16°C (61°F) and an average of 26°C (80°F), peaking at 34°C (94°F). The month sees relatively low precipitation, with 21 mm (0.8 in) over just 3 days, and humidity levels at a comfortable 58%. In contrast, July brings significantly warmer conditions, with minimum temperatures of 25°C (77°F) and an average of 29°C (85°F), reaching highs of 37°C (99°F). However, it also comes with a drastic increase in rainfall, totaling 120 mm (4.7 in) across 22 days, and humidity skyrockets to 89%. This stark difference between the two months highlights the shift from a drier, cooler January to a wet and humid July, making for a more tropical climate. For more details on July's weather, visit Ratchaburi weather in July.

In January, the weather is relatively mild, with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 34°C (94°F) and an average of 26°C (80°F). This month sees only about 21 mm (0.8 in) of precipitation over just 3 days, resulting in a comfortable humidity level of 58%. In contrast, August experiences much warmer temperatures, with a minimum of 24°C (76°F) and a maximum of 37°C (99°F), averaging 29°C (84°F). However, the month is significantly wetter, receiving 167 mm (6.6 in) of rain across 25 days, accompanied by higher humidity at 90%. For more information, you can check out Ratchaburi weather in August.

In January, the weather in Ratchaburi is warm and relatively dry, with average temperatures ranging from a minimum of 16°C (61°F) to a maximum of 34°C (94°F) and only 21 mm of precipitation over about three days. The humidity sits at a comfortable 58%. In contrast, September brings significantly hotter temperatures, with averages ranging from a minimum of 24°C (76°F) to a maximum of 37°C (100°F), coupled with a substantial increase in rainfall at 209 mm spread over about 24 days. The humidity also rises sharply to 87%, resulting in a much more oppressive atmosphere. For more details, you can explore Ratchaburi weather in September.

In comparing the weather of January and October, January typically offers warmer temperatures, with an average high of 34°C (94°F) and a lower average humidity of 58%. With only 21 mm of precipitation over just three days, January is generally drier and sunnier. In contrast, October experiences higher humidity at 83% and significantly more rainfall, totaling 202 mm over 21 days, which can lead to a much wetter atmosphere. The average temperature in October is slightly lower, averaging 28°C (83°F), but the increased precipitation makes it feel more humid and muggy. For more details, you can check Ratchaburi weather in October.

In January, the weather is generally warmer, with average temperatures ranging from a mild 26°C (80°F) to a maximum of 34°C (94°F), while experiencing relatively low humidity at 58% and only 21 mm of precipitation over just three days. In contrast, November sees a slight increase in minimum temperature to 21°C (70°F), and while the average stays comparable at 27°C (81°F), it faces higher humidity levels at 77% and significantly more rainfall of 83 mm spread over ten days. For more detailed weather insights, check out Ratchaburi weather in November.

In comparing the weather of January and December, both months offer a warm climate, with January slightly cooler on average at 26°C (80°F) and a maximum of 34°C (94°F), while December reaches up to 35°C (95°F). The minimum temperatures remain consistent at 16°C (61°F) for both months. Precipitation is slightly higher in January with 21 mm (0.8 in) compared to December’s 17 mm (0.7 in), though both months experience rain on three days. Humidity is noticeably higher in December at 66%, compared to January's 58%. For more details, check out Ratchaburi weather in December.

Compare Ratchaburi's Climate with Cities Worldwide

Conclusion: What to Expect From January Weather in Ratchaburi

January in Ratchaburi is characterized by mild temperatures and relatively low humidity, making it distinct from other months of the year. With maximums reaching around 34°C (94°F) and comfortable averages around 26°C (80°F), it's an ideal time for outdoor activities. The month sees only a handful of rainy days, contributing to a total precipitation of about 21 mm (0.8 in), which is significantly less than the wetter months ahead. Overall, January offers a pleasant escape from the heat, setting the stage for optimal exploration. For more insights on what to expect throughout the year, check out Ratchaburi Climate.