September Weather in Sai Yok, Thailand

Last updated: August 27, 2025

September in Sai Yok, Thailand presents a warm and humid atmosphere, with temperatures soaring to a maximum of 37°C (98°F), while the average hovers around a comfortable 27°C (81°F). Nighttime offers a reprieve, as temperatures drop to a minimum of 23°C (73°F). However, this tropical paradise also witnesses significant rainfall, with a total precipitation of 214 mm (8.4 in) spread over 23 days, creating an ambiance of lush greenery. The humidity level remains high at 87%, making it essential for visitors to stay hydrated and prepare for the occasional downpour while enjoying the vibrant beauty of Sai Yok.

September Temperature in Sai Yok

In September, Sai Yok, Thailand, experiences a blend of warmth and humidity, with temperatures ranging from a minimum of 23°C (73°F) to a maximum of 37°C (98°F). This month's average temperature of 27°C (81°F) is consistent with the preceding months, maintaining a comfortable level for outdoor activities while hinting at the gradual cooling that will follow in October. As the rainy season peaks, the weather becomes increasingly humid, but the overall warmth remains a hallmark of this tropical locale. With temperatures gradually decreasing from the peak summer heat in April and May, September offers a sweet spot for travelers seeking to enjoy the lush landscapes and vibrant culture of the area.

September Weather in Sai Yok: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sai Yok, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sai Yok, September 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).
JanFebMarAprMayJunJulAugSepOctNovDec788185858583828181817977
Data source: Temperature data for Sai Yok 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.

September Precipitation in Sai Yok

September marks a significant peak in precipitation for Sai Yok, Thailand, with an impressive 214 mm (8.4 in) of rain falling over 23 days. This month continues the trend set in the preceding months of the rainy season, contributing to the highest rainfall recorded throughout the year. Following August's substantial 202 mm (8.0 in), September further emphasizes the region's transition into its wettest period, as moisture-laden monsoonal winds persist. Despite the heavy rainfall, this deluge nourishes the lush landscapes of Sai Yok, supporting its vibrant ecosystem and drawing enthusiasts eager to witness the natural beauty that thrives in such humid conditions.

September Precipitation Trends in Sai Yok

The chart displays monthly precipitation patterns in Sai Yok, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Sai Yok, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec14922751111341352032141735911
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sai Yok

In Sai Yok, Thailand, September marks a transition in humidity levels, where the air remains predominantly humid at around 87%. This figure represents a slight decrease from the peak humidity of 90% observed in August, yet it's still among the highest readings of the year. Notably, the humidity begins to trend downwards as the region moves towards the cooler months, with October's figures dipping to 83%. The pattern illustrates how the wet season grips Sai Yok during the summer months, peaking in the heart of the rainy season and gradually falling as autumn approaches, providing a dynamic atmosphere that shapes the local climate and lifestyle.

September Average Humidity in Sai Yok

This chart illustrates the average monthly humidity levels in Sai Yok, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Sai Yok 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 September generated using information from the Copernicus Climate Change Service.

September UV Index in Sai Yok

In September, Sai Yok, Thailand continues to experience an extreme UV Index level of 14, a trend that has remained consistent since March. This high level of UV radiation means that even brief sun exposure can lead to sunburn within just 10 minutes. The unwavering intensity of the UV Index throughout the summer months highlights the importance of sun safety measures during this time. As the region transitions into October, the UV Index slightly decreases to 13, but the need for vigilance remains crucial. For detailed information on UV exposure levels throughout the year, check out Sai Yok UV Index.

Maximum UV Index Levels in Sai Yok for September

The chart shows the monthly maximum UV Index (UVI) for Sai Yok in September, 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 September, the maximum UV index in Sai Yok typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11121414141414141413109
Data source: Sai Yok September 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.

September Sunshine in Sai Yok

September in Sai Yok, Thailand, offers a gentle transition as the sunshine begins to wane from the vibrant summer months, totaling 251 hours of sunshine. This marks a slight decline from the preceding months, where March and April basked under the sun for a remarkable 328 and 312 hours respectively. As summer gives way to the rainy season, the monthly sunshine hours have consistently decreased from a high of 328 in March to 253 in August. Despite this decrease, September’s weather remains pleasantly warm, allowing visitors to enjoy the lush landscapes and tranquil rivers. The gradual change in sunshine hours hints at the approaching monsoon, inviting travelers to experience the natural beauty of Thailand in a quieter light.

Monthly Sunshine Duration in Sai Yok: September Highlighted

The September sunshine duration represents the total number of hours Sai Yok experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec250h298h328h312h306h291h259h253h251h274h294h315h
Data source: Sai Yok September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Sai Yok During September

September in Sai Yok, Thailand, tends to be characterized by lower chances of sunny weather, with only an 8% likelihood of sunshine. This trend continues a pattern seen in the preceding months of July and August, which also reflect minimal sun exposure at just 9% each. The rainy season influences these figures, contributing to the significantly reduced chances of clear skies. As a contrast, the year begins with notably brighter months, peaking in February at a striking 78% chance of sun. However, by the time September rolls around, it’s clear that the stormy monsoon season takes precedence, making this month one of the least favorable for sun seekers in Sai Yok.

Percentage of Sunny Days in September in Sai Yok

The chart illustrates the percentage of sunny days in Sai Yok throughout the year, with September 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 Sai Yok experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec64%78%55%16%32%16%9%9%8%14%28%67%
Data source: Sai Yok September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Sai Yok in September

In September, Sai Yok, Thailand enjoys a consistent 12 hours of daylight, continuing the trend established from March through August. This stability in daylight duration enhances outdoor activities and travel opportunities, allowing visitors and locals alike to fully embrace the natural beauty of the region. As the year transitions into October, daylight begins to wane, dropping back to 11 hours. This gradual shift signals the approach of the cooler months, yet September remains a vibrant time where long, sunlit days invite exploration and adventure.

Average Daylight Hours in Sai Yok for September

The chart illustrates the variation in daylight duration in Sai Yok throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 22m11h 40m12h 2m12h 26m12h 46m12h 56m12h 51m12h 33m12h 11m11h 47m11h 27m11h 17m
Data source: Sai Yok daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Sai Yok

As the vibrant month of September unfolds in Sai Yok, Thailand, the gentle winds begin to whisper at an average speed of 1.5 m/s (3 mph), representing a notable dip from the breezier summer months. This subtle shift reflects a seasonal transition, as the winds during June and July reached the refreshing speeds of 2.3 m/s and 2.2 m/s respectively. The light breezes of September offer a tranquil ambiance, reminiscent of a serene change in the air, contrasting with the more vigorous gusts experienced earlier in the year. As we approach the end of the rainy season, the calming winds pave the way for a gradual increase in movement, signaling a returning vigor by October and November when speeds begin to rise once more. This cyclical pattern of wind speeds not only enhances the natural beauty of the region but also sets the stage for the delightful adventures that await in the enchanting landscapes of Sai Yok.

Average September Wind Speed in Sai Yok

The chart displays monthly wind speed patterns in Sai Yok, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.01.81.51.51.72.32.21.91.5 m/s1.41.82.2
Data source: Sai Yok September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Sai Yok Compares to Other Months

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

September and January present contrasting weather patterns. In September, the temperatures range from a minimum of 23°C (73°F) to a maximum of 37°C (98°F), with an average temperature of 27°C (81°F). This month is also characterized by significant precipitation, receiving 214 mm (8.4 in) over 23 days, and high humidity levels at 87%. In contrast, January offers a cooler climate, with temperatures varying from a minimum of 13°C (56°F) to the same maximum of 37°C (99°F), and an average of 25°C (78°F). Precipitation drops to just 14 mm (0.6 in) across 3 days, and humidity decreases to 58%. For more detailed insights on the weather, check out Sai Yok weather in January.

September and February showcase distinct weather patterns in the region. September tends to be much more humid, with an average temperature of 27°C (81°F) and high humidity levels reaching 87%. This month sees significant rainfall, totaling 214 mm (8.4 in) over about 23 days, creating a lush and often stormy atmosphere. In contrast, February experiences a milder climate with a minimum temperature of 17°C (62°F) and a similar average of 27°C (81°F), but with an impressive drop in humidity to 59%. Rainfall is minimal during this month, accumulating only 9 mm (0.3 in) over just 3 days, making it a drier and more comfortable time to enjoy outdoor activities. For more details, you can check out Sai Yok weather in February.

In September, the weather is notably warmer and more humid, with temperatures ranging from a minimum of 23°C (73°F) to a scorching maximum of 37°C (98°F). This month also experiences substantial rainfall, with 214 mm (8.4 in) of precipitation over 23 days, contributing to a high humidity level of 87%. In contrast, March offers slightly cooler temperatures, with a minimum of 18°C (65°F) and a maximum reaching up to 40°C (104°F). The month is characterized by significantly less rainfall, totaling only 22 mm (0.9 in) over just 3 days and a lower humidity level of 62%. For a closer look at the weather patterns in March, you can check Sai Yok weather in March.

Comparing the weather in September and April reveals significant differences in temperature and precipitation patterns. September tends to be more humid, with higher overall humidity at 87%, and temperatures ranging from a minimum of 23°C (73°F) to a maximum of 37°C (98°F). It also experiences considerable rainfall, with 214 mm (8.4 in) over 23 days. In contrast, April boasts a higher average temperature of 30°C (86°F) and can reach maximums of 41°C (106°F), but with much less precipitation of 75 mm (2.9 in) across just 14 days and lower humidity at 69%. For more details, you can check Sai Yok weather in April.

In September, the weather tends to be warm and humid, with minimum temperatures around 23°C (73°F) and average highs reaching up to 37°C (98°F). The month experiences significant rainfall, with 214 mm (8.4 in) spread over 23 days, contributing to a high humidity level of 87%. In contrast, May offers slightly warmer average temperatures at 29°C (85°F), and maximums can soar to 40°C (104°F). However, it sees less precipitation at 111 mm (4.4 in) over 19 days and a lower humidity of 79%. For a detailed look at the weather specifics for May, you can visit Sai Yok weather in May. Overall, while both months share a warm climate, May tends to be drier and hotter compared to the more humid and rainy September.

When comparing the weather in September and June, both months exhibit warm temperatures, with September showing a minimum temperature of 23°C (73°F) and an average of 27°C (81°F), slightly cooler than June's minimum of 23°C (75°F) and average of 28°C (83°F). The maximum temperatures are quite similar, with September reaching up to 37°C (98°F) while June can peak at 38°C (100°F). Additionally, September experiences significantly more precipitation, with 214 mm (8.4 in) over 23 days, compared to June's 134 mm (5.3 in) across 21 days. Despite these differences, both months maintain a consistent humidity level of 87%. For more details on June weather, you can visit Sai Yok weather in June.

In comparing the weather between September and July, both months exhibit high temperatures, with September averaging a bit cooler at 27°C (81°F) compared to July's 28°C (82°F). The maximum temperatures in September can reach up to 37°C (98°F), while July peaks at a slightly lower 35°C (96°F). Rainfall is significantly higher in September, with 214 mm (8.4 in) over 23 rainy days, compared to July’s 135 mm (5.3 in) across 22 days, indicating that September tends to be wetter and more humid, though not dramatically so, with humidity levels at 87% in September and 89% in July. For more detailed insights, you can check Sai Yok weather in July.

In comparing the weather between September and August, we see that both months experience a similar minimum and average temperature, with September's maximum temperature peaking slightly higher at 37°C (98°F) compared to August's 35°C (96°F). Rainfall is quite substantial in both months, with September receiving 214 mm (8.4 in) over 23 days, while August accounts for 202 mm (8.0 in) over 25 days. Humidity levels are also closely matched, though September is slightly less humid at 87% versus August's 90%. For more details, you can check Sai Yok weather in August.

September and October exhibit some notable differences in weather patterns. In September, temperatures range from a minimum of 23°C (73°F) to a maximum of 37°C (98°F), with an average of 27°C (81°F). This month also records higher precipitation at 214 mm (8.4 in) over 23 days, contributing to a humid atmosphere with an average humidity of 87%. In contrast, October sees a slight decrease in temperature, with a minimum of 21°C (70°F) and a maximum of 34°C (94°F), maintaining the same average of 27°C (81°F). Additionally, precipitation drops to 173 mm (6.8 in) over 20 days, resulting in slightly lower humidity at 83%. Overall, October presents a cooler and slightly drier climate compared to September. For more detailed weather information, you can explore Sai Yok weather in October.

In September, the weather is notably warmer, with average temperatures reaching 27°C (81°F) and highs soaring up to 37°C (98°F). Additionally, it's characterized by high humidity at 87% and significant precipitation, totaling 214 mm (8.4 in) over 23 days. In contrast, November enjoys a more moderate climate, with average temperatures dropping to 26°C (79°F) and a maximum of 34°C (93°F). The humidity decreases to 77%, and the rainfall is substantially lighter, amounting to 59 mm (2.3 in) over only 10 days. For a more detailed look at what to expect, you can check out Sai Yok weather in November.

In September, the weather is significantly warmer and more humid, with temperatures ranging from a minimum of 23°C (73°F) to a maximum of 37°C (98°F) and an average of 27°C (81°F). This month also sees considerable rainfall, totaling 214 mm (8.4 in) over 23 days, resulting in high humidity levels of 87%. In contrast, December offers a much cooler climate, with temperatures varying from a minimum of 14°C (58°F) to a maximum of 35°C (94°F) and an average of 25°C (77°F). Precipitation drops dramatically in December to just 11 mm (0.4 in) over only 2 days, and humidity decreases to a comfortable 66%. For more information on the weather patterns in December, you can visit Sai Yok weather in December.

Compare Sai Yok's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Sai Yok

As September unfolds in Sai Yok, it brings a notable transition marked by increased humidity and frequent rainfall, setting it apart from the drier months of the year. With an average temperature that remains warm but a significant uptick in precipitation, the landscape flourishes under the nurturing downpours, making it a vibrant time for nature enthusiasts. Visitors can expect lush greenery and a refreshing atmosphere, although the high humidity levels can make it feel quite muggy. To dive deeper into how this month compares to others and to get a comprehensive view of the region's climate, check out Sai Yok Climate.