Last updated: August 27, 2025
In Prachuap Khiri Khan, Thailand, September brings a warm and humid climate, with an average temperature hovering around 27°C (80°F). Daily maximums reach 32°C (89°F), while minimums drop to a comfortable 24°C (75°F). However, this month is characterized by significant precipitation, totaling 201 mm (7.9 in) across approximately 25 rainy days, contributing to an average humidity of 86%. Visitors can expect lush landscapes and vibrant flora, but should be prepared for frequent showers that are typical of the rainy season.
In September, Prachuap Khiri Khan offers a humid tropical embrace, with temperatures reflecting the region's late wet season characteristics. The minimum temperature hovers around 24°C (75°F), while the average remains steady at 27°C (80°F), culminating in a maximum temperature of 32°C (89°F). This month shows a continuation of the warm patterns established earlier in the year, with no significant drop-off in warmth compared to August. As the transition towards October begins, temperatures gradually start to cool, hinting at the approaching dry season. Overall, September serves as a warm bridge between the sultry summer and the more temperate autumn ahead, ensuring outdoor activities are still enjoyable amidst the tropical ambiance.
September marks a peak in the rainy season for Prachuap Khiri Khan, Thailand, with a significant precipitation amount of 201 mm (7.9 in), making it one of the wettest months of the year. Rainfall is frequent, occurring over 25 days, which highlights a trend towards consistent downpours that characterize this time of year. This increase in precipitation not only sets September apart from previous months but also establishes it as a precursor to the even heavier rains in October, which averages a notable 231 mm (9.1 in). The escalating rainfall during this period signifies the region’s transition into its most lush and vibrant phase, ultimately shaping the local ecosystem and agricultural patterns.
In September, the humidity in Prachuap Khiri Khan remains notably high at 86%, continuing the trend observed in the preceding months. This peak follows the sultry summer, where July and August recorded the highest humidity levels at 87% and 88%, respectively. As the region transitions into the cooler months, humidity begins to slightly decline, dropping to 84% in October and then 83% in November. Overall, September showcases the lingering effects of the rainy season, with air saturated in moisture, making it one of the more humid months in this tropical locale.
September in Prachuap Khiri Khan, Thailand, sees a consistent UV Index of 14, categorized as extreme, which aligns with the trends observed from May through August. This sustained high level suggests that outdoor enthusiasts should remain vigilant against sun exposure, as the burn time remains a quick 10 minutes. With the UV Index only slightly decreasing in October, the importance of sun protection continues to be paramount. As residents and visitors enjoy the sunny weather, staying informed about UV levels is essential for safe outdoor activities. For more details, check out the complete UV Index data for the area here: Prachuap Khiri Khan UV Index.
UV Risk Categories
In September, Prachuap Khiri Khan experiences a gentle transition as the sunshine hours settle at 264 hours. While this marks a slight dip from the vibrant summer months of July and August, the overall trend reveals a resilient sunlight presence throughout the year. Emerging from the peak of spring, where March glitters with a robust 340 hours of sunshine, the region maintains a commendable light during the rainy season. As September sets in, it’s a time when the skies still favor leisurely days on the beach, making the town a hidden gem for those seeking a warm embrace of late summer sun before the cooler months approach.
In Prachuap Khiri Khan, Thailand, the likelihood of basking in sunny weather significantly diminishes by September, with only a 7% chance of clear skies. This trend reflects a steady decline in sunshine throughout the rainy season, which begins in May and continues through August, where the chances plummet to a meager 8%. As the months progress from the relatively brighter days of earlier in the year, like February's 64%, September stands out as a stark contrast, indicating the region’s transition into more overcast and wet conditions. Therefore, those seeking sun-drenched days should consider visiting earlier in the year, as September's weather is predominantly characterized by clouds and rain.
In Prachuap Khiri Khan, Thailand, the daylight duration exhibits a consistent pattern as the year progresses. Starting from January through February, residents enjoy a stable 11 hours of daylight that sets a tranquil tone for the start of the year. As March arrives, daylight begins to increase, reaching 12 hours in April and sustaining that amount through August. This month marks the height of daylight, encouraging outdoor activities and vibrant cultural happenings. September maintains this appealing 12-hour duration, offering a seamless transition into the cooler months. As the year winds down, daylight gradually recedes back to 11 hours by October, creating a rhythmic ebb and flow that complements the changing seasons in this picturesque locale.
September in Prachuap Khiri Khan, Thailand offers a gentle breeze with an average wind speed of 3.4 m/s (8 mph), slightly less than the bustling winds of the preceding summer months. This transition into autumn marks a subtle shift from the stronger gusts of July and August, which averaged 4.4 m/s (10 mph) and 3.9 m/s (9 mph) respectively. The consistent trend of wind speeds suggests a calming of the atmosphere as the region prepares for the upcoming seasonal changes, with comparable speeds persisting into October. As the year progresses, one can anticipate a gradual increase in wind intensity once more, leading into the brisker months of November and December, where winds rise to 4.0 m/s (9 mph) and peak at 4.8 m/s (11 mph).
Weather in Prachuap Khiri Khan varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Prachuap Khiri Khan, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather patterns in Prachuap Khiri Khan. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 32°C (89°F), with an average of 27°C (80°F). This month is also marked by high humidity at 86% and significant rainfall of 201 mm (7.9 in) spread over 25 days. In contrast, January experiences milder conditions, with temperatures varying from 19°C (67°F) to a maximum of 30°C (86°F) and an average temperature of 25°C (78°F). Additionally, January enjoys a drier climate, with only 93 mm (3.7 in) of precipitation over just 6 days and lower humidity at 67%. For a more detailed look at the weather specifics, you can visit Prachuap Khiri Khan weather in January.
In September, the weather is typically warmer and more humid, with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 32°C (89°F). This month also experiences significant rainfall, accumulating around 201 mm (7.9 in) over 25 days, leading to a humidity level of 86%.
In contrast, February offers milder conditions, featuring average temperatures between 21°C (70°F) and 32°C (89°F), but with much lower precipitation of just 35 mm (1.4 in) over only 5 days. This results in a more comfortable humidity level of 66%. The distinct differences in weather make February a drier and less humid month compared to September. For more detailed information on February weather, visit Prachuap Khiri Khan weather in February.
September and March have similar average temperatures, with both months hovering around 27°C (81°F). However, September is notably more humid, with an average humidity of 86% compared to March's 68%. Additionally, September experiences significantly higher rainfall, totaling 201 mm (7.9 in) over 25 days, while March sees only 54 mm (2.1 in) of precipitation across just 9 days. This leads to a wetter and more humid atmosphere in September, whereas March is generally drier and more comfortable. For more detailed insights, you can check Prachuap Khiri Khan weather in March.
In comparing the weather of September and April, both months feature similar average temperatures, with September having a minimum of 24°C (75°F) and an average of 27°C (80°F), while April’s minimum is slightly lower at 23°C (73°F) and a similar average of 27°C (82°F). Notably, April often experiences slightly higher maximum temperatures, reaching up to 33°C (91°F) compared to September's peak of 32°C (89°F). However, September is characterized by significantly higher precipitation, receiving 201 mm (7.9 in) over 25 days, in contrast to April's 144 mm (5.7 in) across 20 days, proving to be a drier month with lower humidity at 71%. For a detailed look at April's weather, you can refer to Prachuap Khiri Khan weather in April.
When comparing the weather in September and May, both months exhibit similar minimum temperatures, with September averaging around 24°C (75°F) and May slightly warmer at 24°C (76°F). However, May tends to be slightly warmer overall, averaging 28°C (82°F) compared to September's 27°C (80°F), and reaching a maximum of 33°C (92°F) versus September's 32°C (89°F). In terms of precipitation, September is the wetter month, receiving 201 mm (7.9 in) over 25 days, while May sees slightly less rain at 170 mm (6.7 in) over 24 days. Humidity levels are also higher in September at 86%, compared to May's more comfortable 77% humidity. For a closer look at May's weather, you can check Prachuap Khiri Khan weather in May.
In both September and June, the temperatures in Prachuap Khiri Khan are quite similar, with minimums around 24°C (75°F), averages of 27°C (80°F), and maximums reaching 32°C (89°F in September and 90°F in June). However, September tends to be wetter, with 201 mm (7.9 in) of precipitation over 25 days compared to June's 134 mm (5.3 in) over 24 days. The humidity levels are also slightly higher in September at 86%, compared to June's 85%, making September feel a bit more oppressive despite similar temperature readings. For more details about June weather in this region, you can check Prachuap Khiri Khan weather in June.
In comparing the weather of September and July, we see that both months feature a similar temperature range, with minimums around 24°C (75°F), average highs of 27°C (80°F), and maximums reaching up to 32°C (89°F in September and 90°F in July). However, September experiences significantly more precipitation, totaling 201 mm (7.9 in) across 25 days, compared to July’s 152 mm (6.0 in) over 26 days. The humidity levels are quite high in both months, with September averaging 86% and July slightly higher at 87%. For more detailed information on July's weather, visit Prachuap Khiri Khan weather in July.
In comparing the weather of September and August, both months experience similar temperature ranges, with September recording a minimum temperature of 24°C (75°F), averaging 27°C (80°F), and reaching a maximum of 32°C (89°F). August matches these temperatures closely, with a minimum of 24°C (76°F), an average of 27°C (80°F), and a slightly higher maximum of 32°C (90°F). However, September is characterized by significantly higher precipitation levels, totaling 201 mm (7.9 in) over 25 days compared to August's 156 mm (6.2 in) across 27 days. Humidity remains high in both months, but September exhibits a slightly lower average at 86% compared to August's 88%. For a detailed look at August weather specifics, you can refer to Prachuap Khiri Khan weather in August.
September and October weather exhibits some similarities but also notable differences. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 32°C (89°F), with an average of 27°C (80°F). The month experiences significant rainfall, totaling 201 mm (7.9 in) over 25 days and maintaining a high humidity level of 86%. In contrast, October sees slightly cooler average temperatures at 26°C (80°F), with the same maximum of 32°C (89°F) and a minimum of 23°C (74°F). However, October has increased precipitation, reaching 231 mm (9.1 in) over 27 days, while humidity remains slightly lower at 84%. For a more detailed look at October's weather conditions, you can check this link: Prachuap Khiri Khan weather in October.
September and November share similar warm temperatures, with September experiencing slightly higher averages, peaking at a maximum of 32°C (89°F) compared to November's 31°C (88°F). However, September is marked by higher precipitation, receiving 201 mm (7.9 in) over 25 days, while November sees significantly less rain at 148 mm (5.8 in) over just 14 days. Humidity levels are fairly comparable, with September at 86% and November at 83%. For a detailed look at what to expect during this month, check out Prachuap Khiri Khan weather in November.
In September, the weather is generally warmer and more humid, with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 32°C (89°F). This month also sees significant rainfall, with precipitation reaching 201 mm (7.9 in) over 25 days and humidity levels at 86%. In contrast, December offers milder conditions, with temperatures dropping slightly to a minimum of 19°C (67°F) and a maximum of 31°C (88°F). The decrease in rainfall is notable, as only about 40 mm (1.6 in) of precipitation occurs over just 6 days, and humidity decreases to 77%. For more details, you can check out the Prachuap Khiri Khan weather in December.
In September, Prachuap Khiri Khan experiences a distinct shift in weather patterns, characterized by higher humidity and an abundance of precipitation. This month stands out with the greatest rainfall, resulting in frequent downpours that can disrupt typical travel plans. While daytime temperatures remain relatively warm, averaging around 27°C, the increased moisture can make it feel much sweatier than in drier months. This blend of heat and humidity creates a tropical atmosphere that distinguishes September from other parts of the year. For those interested in learning more about the overall climate of this region, visit Prachuap Khiri Khan Climate.