Last updated: August 27, 2025
September in Nai Harn, Thailand, embraces a tropical climate characterized by warm temperatures and ample rainfall. With a maximum of 29°C (85°F) and an average temperature of 28°C (82°F), this month offers a comfortable yet humid atmosphere, featuring an average minimum temperature of 25°C (78°F). However, travelers should be prepared for the region's heavy rainfall, as 251 mm (9.9 in) of precipitation is recorded over 24 days, leading to lush landscapes and vibrant scenery. The air humidity hovers around a tropical 84%, contributing to a refreshing but steamy experience for beachgoers and adventurers alike.
In September, Nai Harn, Thailand, experiences warm and pleasant temperatures, making it a comfortable time to visit. The minimum temperature hovers around 25°C (78°F), while the average settles at a delightful 28°C (82°F). Daily highs reach up to 29°C (85°F), showcasing a slightly cooler trend compared to the peak heat of previous months. This gentle shift signals the tail end of the rainy season, with humidity still lingering from previous months but softened by occasional breezes. Overall, September presents a perfect blend of warmth without the extreme heat, ideal for those looking to explore the natural beauty and vibrant culture of this coastal gem.
In September, Nai Harn, Thailand, experiences a significant spike in precipitation, with an average of 251 mm (9.9 in) of rainfall spread over 24 days. This marks a continuation of the wet season trend, following the substantial rainfalls of the preceding months. The increase from August's 174 mm highlights the peak of the rainy season, where daily downpours become more frequent and intense. As the skies open up, the lush landscapes around Nai Harn thrive, creating a vibrant and lush environment. This month sets the stage for October, which typically sees even more rain, as residents and visitors alike prepare for the surge in moisture that characterizes this tropical paradise.
As September rolls into Nai Harn, Thailand, the humidity peaks at 84%, marking it as one of the most humid months of the year. This gradual increase in humidity is notable, as it follows the trend of rising moisture levels from the previous months, particularly after the rainy season begins in June. With July and August witnessing high readings of 79% and 82%, respectively, September's humidity indicates a consistent pattern, with figures maintaining a steady high into the following months. This atmospheric condition not only enhances the tropical charm of Nai Harn but also prepares residents and visitors alike for the transition into the slightly cooler, yet equally humid, months of October through December.
In September, Nai Harn, Thailand, experiences a UV Index of 14, categorizing it as extreme and underscoring the importance of sun safety. This month maintains the high UV levels seen during the summer months, which include March to August, where the index reached a peak of 15 in both March and April. Although the intensity slightly dips in October, the consistent exposure category across these months calls for caution, as the burn time remains a mere 10 minutes. Visitors and locals alike should take proactive measures to protect their skin. For more detailed insights on UV levels throughout the year, check out the full report at Nai Harn UV Index.
UV Risk Categories
In Nai Harn, Thailand, September shines with an impressive 292 hours of sunlight, marking a slight dip from the vibrant summer months. As the tail end of the rainy season approaches, sunlight hours begin to wane, especially when compared to peak months like March, which boasts a remarkable 345 hours. Despite this seasonal transition, September still offers abundant sunshine that beckons travelers to enjoy the warm beaches and vibrant local culture. In contrast to the cooler and shorter days of the upcoming months, September maintains a comfortable balance, making it an ideal time for those seeking a blend of sunny weather and fewer tourists.
In Nai Harn, Thailand, the likelihood of sunny weather experiences a notable decline as September unfolds, with only a 9% chance of sunshine. This marks one of the year's lowest probabilities for clear skies, following the rainy months of August and June, which also hover around 12% and 21%, respectively. As the monsoon season peaks, locals and visitors alike can expect overcast days and scattered showers, contrasting sharply with the brighter outlooks seen in earlier months like February and March, where the chances of sun soar to 47% and 42%. Thus, if you're planning a trip to this beautiful coastal paradise in September, it's wise to prepare for a mix of sun and rain.
In Nai Harn, Thailand, September offers a delightful 12 hours of daylight, continuing the trend established during the summer months. As daylight duration peaks from March through September, residents and visitors alike can enjoy a generous amount of sunshine, perfect for beach outings and outdoor adventures. This consistent pattern makes the transition into autumn feel seamless, as daylight gradually dips to 11 hours starting in October. With the sun lingering longer during the late spring and summer, September embodies the vibrant energy of Thailand's tropical charm, before signaling a gentle shift toward shorter days in the coming months.
In September, Nai Harn, Thailand, experiences a gentle breeze with an average wind speed of 4.3 m/s (10 mph), indicative of the transition into the cooler months. This slight uptick from the mid-summer lows, particularly when compared to the earlier months of April and May, reflects a gradual shift in the seasonal patterns. The winds begin to pick up slightly after the calmer summer months, creating an inviting atmosphere for outdoor activities. As the region moves toward October, the wind speed increases a bit more to 4.7 m/s (10 mph), suggesting the approach of the season's changes and enhancing the allure of this tropical paradise. This subtle trend in wind activity serves as a reminder of the constant dance between seasons, making each visit to Nai Harn uniquely refreshing.
Weather in Nai Harn varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Nai Harn, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January exhibit notable differences in weather patterns. September experiences slightly higher temperatures, with an average of 28°C (82°F) and a maximum of 29°C (85°F), accompanied by significant rainfall totaling 251 mm (9.9 in) over 24 days. In contrast, January offers slightly cooler temperatures, averaging 27°C (81°F) and peaking at 30°C (86°F), while presenting a much drier climate with only 117 mm (4.6 in) of precipitation spread over just 11 days and lower humidity at 76%. For a detailed look at January weather, you can visit Nai Harn weather in January.
September and February exhibit distinct weather characteristics, making them vastly different months. In September, temperatures range from a minimum of 25°C (78°F) to a maximum of 29°C (85°F), with an average temperature of 28°C (82°F). This month sees significant rainfall, totaling 251 mm (9.9 in) across 24 days, accompanied by high humidity levels of 84%. In contrast, February features slightly warmer temperatures, with a minimum of 25°C (78°F), an average of 27°C (82°F), and a maximum of 30°C (87°F). However, it is notably drier, with only 15 mm (0.6 in) of precipitation over 4 days and a lower humidity level at 73%. For a detailed look at the February conditions, you can check this link: Nai Harn weather in February.
In September, the weather tends to be warmer, with an average temperature around 28°C (82°F) and highs reaching up to 29°C (85°F). However, this month also experiences significant rainfall, amounting to 251 mm (9.9 in) over 24 days, coupled with high humidity at 84%. In contrast, March offers slightly higher maximum temperatures, peaking at 30°C (87°F), while maintaining a similar average of 28°C (83°F). Rainfall in March is considerably less, totaling only 41 mm (1.6 in) across 9 days, and the humidity is lower at 74%. For more detailed information, you can explore Nai Harn weather in March.
In September, the weather tends to be quite humid and rainy, with average temperatures around 28°C (82°F) and high humidity at 84%. The region experiences significant rainfall, accumulating to 251 mm (9.9 in) over 24 days. In contrast, April boasts similar temperatures with an average of 28°C (83°F) but enjoys a drier climate, featuring only 160 mm (6.3 in) of rain over 22 days and lower humidity at 71%. This makes April a more comfortable month for outdoor activities compared to the wetter and stickier conditions of September. For further details, you can check Nai Harn weather in April.
In comparing the weather between September and May, we observe that both months have similar average temperatures, with September averaging 28°C (82°F) and May slightly warmer at 28°C (83°F). However, September tends to be more humid, with an average humidity of 84% compared to May's 72%. Rainfall is also more frequent in September, accumulating 251 mm (9.9 in) over 24 days, while May sees 225 mm (8.9 in) over 26 days. This indicates that while both months are warm, May generally offers drier and slightly more comfortable conditions. For more detailed insights, you can check Nai Harn weather in May.
September and June exhibit similar temperatures, with both months having a minimum of 25°C (78°F) and an average around 28°C (82°F). However, September tends to be slightly cooler, with a maximum temperature of 29°C (85°F) compared to June's peak at 30°C (87°F). When it comes to precipitation, September is notably wetter, receiving 251 mm (9.9 in) over 24 days, while June records 202 mm (8.0 in) across 23 days. Additionally, humidity levels are higher in September at 84%, compared to June's 79%. For those looking for specific information on conditions during June, you can check Nai Harn weather in June.
In comparing the weather between September and July, we see that both months share similar average temperatures, with September recording a minimum of 25°C (78°F) and July slightly warmer at 26°C (79°F). Both months also peak at a maximum of 29°C (85°F). However, September is notably wetter, with a significant increase in precipitation at 251 mm (9.9 in) over 24 days, compared to July's 169 mm (6.7 in) over 17 days. Additionally, September's humidity is higher at 84%, compared to July's 79%, making it feel more muggy. For more detailed weather insights during this season, you can check out Nai Harn weather in July.
In comparing the weather of September to August, we see some notable differences. September tends to be slightly cooler, with maximum temperatures averaging 29°C (85°F) compared to August's 30°C (86°F). Both months experience similar minimum temperatures around 25°C (77-78°F) and average temperatures of 28°C (82°F). However, September is significantly wetter, receiving 251 mm (9.9 in) of rain over 24 days, while August has a lower precipitation level of 174 mm (6.8 in) across 20 days. Humidity also rises slightly in September, averaging 84% compared to August's 82%. For a more detailed look at August weather patterns, you can visit Nai Harn weather in August.
In September, the weather features a warm minimum temperature of 25°C (78°F) and an average of 28°C (82°F), with highs reaching up to 29°C (85°F). However, it is also quite wet, experiencing significant precipitation over 24 days, totaling 251 mm (9.9 in) and maintaining a high humidity level of 84%.
In comparison, October sees a slight decrease in average temperature to 27°C (81°F), while the minimum and maximum temperatures remain stable at 25°C (77°F) and 29°C (85°F), respectively. The month is marked by increased rainfall, with precipitation reaching 294 mm (11.6 in) across 26 days, and humidity levels drop slightly to 83%. For a more detailed look at the weather conditions, you can check Nai Harn weather in October.
In September, temperatures typically range from a minimum of 25°C (78°F) to a maximum of 29°C (85°F), with an average of 28°C (82°F). The month sees considerable rainfall, with 251 mm (9.9 in) of precipitation spread over 24 days and humidity levels consistently high at 84%. In contrast, November experiences slightly warmer temperatures, with an average of 27°C (81°F) and a maximum of 30°C (87°F). However, it also brings more rainfall, totaling 279 mm (11.0 in) over 25 days, while maintaining the same high humidity of 84%. For more detailed information, you can check the Nai Harn weather in November.
In comparison, September and December present distinct weather patterns. September experiences slightly higher temperatures with an average of 28°C (82°F) and a maximum of 29°C (85°F), while December’s average temperature is a bit lower at 27°C (81°F) and peaks at 30°C (87°F). However, September is characterized by significantly higher precipitation, totaling 251 mm (9.9 in) over 24 days, compared to December's 174 mm (6.9 in) over just 14 days. Both months maintain a consistent humidity level of 84%, creating a warm and humid environment year-round. For more detailed information, you can check Nai Harn weather in December.
As September unfolds in Nai Harn, the weather presents a shift from the typically drier months, bringing a significant increase in precipitation and humidity. With an average temperature hovering around a comfortable 28°C (82°F), the region experiences frequent rain showers—24 days of precipitation—creating a lush and vibrant landscape. This month is marked by an average humidity of 84%, which can be quite different from the drier spells of the preceding months. If you're planning a visit, be prepared for the tropical vibes of the rainy season, where the charm of Nai Harn is enhanced by its refreshing downpours. For more details on the weather patterns throughout the year, visit Nai Harn Climate.