Last updated: August 27, 2025
In September, Si Racha, Thailand experiences a warm and humid climate, with average temperatures hovering around 28°C (83°F). Daytime highs can reach a sweltering 35°C (95°F), while nights offer slight relief with minimum temperatures of 24°C (76°F). This month is characterized by significant precipitation, totaling 262 mm (10.3 in) over roughly 25 rainy days, contributing to the high humidity levels of 87%. Despite the rain, the tropical scenery in Si Racha thrives, making it a vibrant time for those who embrace the lush landscapes of this coastal town.
In September, Si Racha, Thailand, experiences a warm and humid tropical climate, showcasing a minimum temperature of 24°C (76°F) and a comfortable average of 28°C (83°F). The maximum reaches 35°C (95°F), aligning with the overall trend of warm temperatures that peak during the late summer months. As the region transitions towards the end of the rainy season, the temperatures remain relatively consistent, akin to the previous months, such as August. This consistency in warmth makes September a great time for beachgoers and adventurers alike, despite the increased chance of rainfall. Overall, visitors to Si Racha can expect a sultry atmosphere that invites both relaxation and exploration.
In September, Si Racha experiences its wettest month, with an impressive 262 mm (10.3 in) of rainfall over 25 days. This substantial precipitation marks a noticeable peak in the region's annual rainfall trends, following the earlier months of increasing rainfall, particularly from May onward. While the summer months saw significant accumulation, September stands out as a pivotal transition into the rainy season, setting the stage for even more precipitation in October. The high number of rainy days this month suggests that intermittent downpours are frequent, characteristic of the tropical climate that defines the region. As the landscape absorbs this deluge, the vibrant greenery of Si Racha bursts forth, showcasing nature's resilience and beauty amid the showers.
In September, Si Racha, Thailand, experiences a notable shift in humidity, hovering around 87%. This month marks a slight decrease from the peak humidity levels recorded in August at 88%, indicating a gradual transition towards the more temperate conditions of October, which sees humidity drop to 83%. Generally, the region's humidity rises through the year, peaking in the mid-summer months of July and August, where readings reach into the high 80s. Following these humid summer months, September still maintains significant moisture in the air, setting the stage for the upcoming transition into autumn, as humidity levels steadily recede into the cooler months ahead.
In September, Si Racha, Thailand, continues to experience an extreme UV Index of 13, a slight dip from the peak levels seen in the preceding months. This translates to a burn time of just 10 minutes, emphasizing the need for consistent sun protection as the region transitions from its peak summer heat into early autumn. Interestingly, the UV Index shows a notable consistency from February through August, where it reached an intense 14, pinning down the exposure category to extreme for much of the summer. As we move into October, the UV Index remains at 13, maintaining the extreme designation, suggesting that sun safety should remain a priority throughout early fall. For a deeper dive into the solar intensity specifics, check out the detailed guide here: Si Racha UV Index.
UV Risk Categories
September in Si Racha, Thailand, shines with 267 hours of sunshine, marking a slight dip from the summer peak but remaining a delightful time to soak up the sun. The months leading up to September, particularly March and April, bask in abundant sunlight, reaching impressive highs of 336 and 321 hours respectively. This trend of vibrant sunshine begins to wane as the monsoon season approaches, reflected in the reduced hours as we move into the fall. However, September still offers a generous amount of sunshine, providing a perfect backdrop for beach activities and outdoor exploration before the cooler months set in. With an average of nearly 287 hours of sun in the preceding months, Si Racha remains a sun seeker’s paradise, inviting visitors to enjoy its warm and inviting atmosphere.
When considering the likelihood of sunny weather in September in Si Racha, Thailand, it’s important to note a clear trend in the region's climate patterns. As the summer months roll in, the chances of sunlight dwindle, with September recording a modest 9% probability of sunshine. This notable dip follows a pattern established in the preceding months; both July and August also witness low sunlight odds, at 12% and 9% respectively. In contrast, the year opens with a more promising forecast, showcasing higher sunshine percentages in the earlier months—57% in January and peaking at 71% in February—before steadily declining through the wetter season. Consequently, travelers seeking sun-soaked days in September may want to reconsider their timing to avoid disappointment.
In Si Racha, Thailand, the month of September enjoys a pleasant 12 hours of daylight, continuing the trend of consistent daylight hours that begins in March and lasts through August. This month marks the peak of a summer-like pattern where prolonged sunlight is the norm, providing ample opportunity for outdoor activities. As the year transitions into autumn, daylight duration begins to wane slightly, dropping to 11 hours in October. Overall, the daylight hours reflect a tropical climate where bright, sunny days prevail, creating a vibrant atmosphere for both residents and visitors alike.
As September unfolds in Si Racha, Thailand, the winds begin to whisper at an average speed of 2.1 m/s (5 mph), marking a gentle decline from the summer breezes. This month typically experiences the softest winds of the year, following a notable peak during the previous summer months of June and July, where the wind speed reached 3.2 m/s (7 mph). While the transition from the bustling winds of summer to the more tranquil currents of autumn can be felt, September’s breezes still offer a pleasant reprieve, reflecting the region’s signature tropical charm. As the year progresses, the winds are expected to gradually pick up again in October and November, reminding residents and visitors alike that the dynamic weather patterns here are ever-changing and full of life.
Weather in Si Racha varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Si Racha, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January showcase distinct weather patterns. September is characterized by warm temperatures, with minimums around 24°C (76°F) and averages reaching 28°C (83°F). However, it also brings significant rainfall, averaging 262 mm (10.3 in) over about 25 days, coupled with high humidity levels at 87%. In contrast, January features a more temperate climate, with lower minimum temperatures of 17°C (62°F) and a similar maximum of 35°C (95°F). Precipitation drastically decreases to 27 mm (1.1 in) across just 4 days, and humidity lowers to 59%, resulting in a much drier and more comfortable atmosphere. For a more detailed look at January weather, check out Si Racha weather in January.
When comparing the weather in September and February, distinct differences emerge. September experiences warmer nights with a minimum temperature of 24°C (76°F) and an average of 28°C (83°F), whereas February offers cooler nights with a minimum of 19°C (66°F). Both months share the same maximum temperature of 35°C (95°F), but September is notably wetter, receiving 262 mm (10.3 in) of rain over 25 days, while February sees only 27 mm (1.1 in) of precipitation over just 5 days. Additionally, humidity is much higher in September at 87%, compared to a more comfortable 58% in February. For more specific details about February weather in Si Racha, check out Si Racha weather in February.
September weather is characterized by higher humidity and significant rainfall, with an average temperature of 28°C (83°F) and a maximum of 35°C (95°F). With 262 mm (10.3 in) of precipitation spread over 25 days, it often feels more oppressive. In contrast, March brings slightly warmer temperatures with an average of 29°C (85°F) and a maximum of 36°C (97°F), yet it experiences much less rainfall at 60 mm (2.4 in) over only 11 days. The humidity in March is also lower at 61%, making the weather feel more comfortable. For a detailed look at what to expect, check out Si Racha weather in March.
In comparing the weather of September and April, we see notable differences in temperature and precipitation patterns. September typically features a warm atmosphere with average temperatures around 28°C (83°F), but can peak at a maximum of 35°C (95°F). However, it is also characterized by high humidity levels at 87% and significant rainfall, accumulating 262 mm over 25 days. In contrast, April boasts slightly warmer conditions with an average temperature of 29°C (85°F) and a higher maximum temperature of 37°C (99°F). Precipitation is much lower in April, with only 122 mm recorded over 18 days and a reduced humidity level of 70%. For a more detailed look at April weather in this region, you can refer to Si Racha weather in April.
In comparing the weather of September and May, we see notable differences. September tends to be slightly warmer with average temperatures ranging from 24°C (76°F) to a maximum of 35°C (95°F), while May boasts an average of 30°C (86°F) with maximum temperatures soaring to 37°C (99°F). September is marked by higher precipitation levels at 262 mm (10.3 in) over 25 days, in contrast to May’s 166 mm (6.5 in) spread across 22 days, resulting in a more humid environment at 87% compared to May’s 80%. For those interested in the specifics of May’s weather, you can find more information here: Si Racha weather in May.
In comparing the weather between September and June, both months exhibit warm temperatures, but there are notable differences in precipitation and humidity levels. September sees average temperatures slightly lower, with a minimum of 24°C (76°F) and a maximum reaching up to 35°C (95°F). However, it experiences significantly more rainfall, accumulating 262 mm (10.3 in) over 25 days, contributing to a higher humidity level of 87%. In contrast, June boasts a slightly higher average temperature of 30°C (86°F), with a minimum of 25°C (77°F) and a maximum also reaching 35°C (96°F). This month, however, is drier, receiving just 109 mm (4.3 in) of precipitation over 22 days and maintaining a slightly lower humidity of 85%. For more details, you can check the Si Racha weather in June.
When comparing the weather in September and July, we see some notable differences. September tends to be slightly cooler, with average temperatures ranging from a minimum of 24°C (76°F) to a maximum of 35°C (95°F). In contrast, July experiences minimal variance in temperature, with an average minimum of 25°C (77°F) and a maximum of 36°C (97°F). Additionally, September is characterized by significantly higher precipitation, totaling 262 mm (10.3 in) over 25 days, compared to July's 168 mm (6.6 in) across the same number of days. Humidity levels remain fairly consistent, with September at 87% and July slightly lower at 86%. For more insights, you can check Si Racha weather in July.
In comparing the weather patterns of September and August, we see some notable similarities and differences. Both months feature a minimum temperature of 24°C (76°F) and a maximum around 35°C (95-96°F), but September's average temperature is slightly cooler at 28°C (83°F) compared to August's 29°C (84°F). Precipitation is significantly higher in September, totaling 262 mm (10.3 in) over 25 days, while August experiences only 160 mm (6.3 in) over 24 days. Humidity levels remain similar, with September at 87% and August at 88%. For more detailed weather information on August, you can visit Si Racha weather in August.
September and October exhibit similar average temperatures, with September featuring a minimum of 24°C (76°F) and a maximum of 35°C (95°F), while October sees a slightly lower minimum of 23°C (74°F) but a higher maximum of 36°C (96°F). In terms of precipitation, September is wetter with 262 mm (10.3 inches) falling over 25 days, compared to October's 228 mm (9.0 inches) over 23 days. Additionally, humidity levels are marginally lower in October at 83%, down from September's 87%. Overall, while both months remain warm and humid, October offers slightly drier and hotter conditions. For more specifics on weather patterns, you can check Si Racha weather in October.
In comparing the weather of September and November, we see notable differences in both precipitation and humidity. September features higher temperatures with a minimum of 24°C (76°F) and an average of 28°C (83°F), peaking at 35°C (95°F). However, it also experiences significant rainfall, totaling 262 mm (10.3 in) over 25 days, accompanied by high humidity at 87%. In contrast, November maintains a similar average temperature of 28°C (83°F) but starts with a slightly lower minimum of 22°C (72°F) and maxes out at 35°C (96°F). Precipitation drops sharply in November to 59 mm (2.3 in) over just 10 days, and the humidity decreases to 78%. Overall, November presents a more drier and less humid experience compared to the wet and humid conditions of September. For more detailed insights, check Si Racha weather in November.
In September, the weather is characterized by high temperatures and significant rainfall, with averages ranging from a minimum of 24°C (76°F) to a maximum of 35°C (95°F). The month experiences around 262 mm (10.3 in) of precipitation over 25 days, contributing to a humid atmosphere with levels reaching 87%. In contrast, December sees much milder conditions, with temperatures dropping slightly to a minimum of 16°C (61°F) and an average of 27°C (81°F), while still touching maximums of 35°C (96°F). Precipitation is drastically reduced to just 28 mm (1.1 in) over only 3 days, and the humidity levels also decrease to 70%. For a detailed look at the weather in December, you can check out Si Racha weather in December.
As September graces Si Racha, the weather takes on a distinctly humid character, contrasting with the drier months preceding it. With an average temperature hovering around a comfortable 28°C, the warmth is tempered by frequent rainfall, contributing to the area's lush greenery. The month is marked by significant precipitation, occurring on nearly every day, which sets it apart from the typically drier summer months. Coupled with high humidity levels, this creates a tropical atmosphere that envelops the region. Whether you're soaking in the vibrant landscapes or seeking respite from the rain, September's unique climate offers a vivid experience of Si Racha's natural beauty. For more detailed insights, check out Si Racha Climate.