Last updated: August 27, 2025
September in Chiang Dao, Thailand offers a vibrant mix of warm temperatures and refreshing rain. With daily maximums reaching 34°C (93°F) and an average of 26°C (79°F), the atmosphere remains inviting yet humid, boasting an average humidity of 83%. The region experiences significant rainfall, accumulating around 214 mm (8.4 in) over 23 days, painting the landscape in lush greens and supporting its rich biodiversity. Despite the frequent showers, this month is an excellent time for travelers to embrace the unique beauty and tranquility of Chiang Dao.
In September, Chiang Dao experiences a comfortable transition as temperatures begin to cool down slightly from the summer heat. With minimums around 19°C (67°F) and maxima reaching 34°C (93°F), the month presents a pleasant average of 26°C (79°F). This is a noticeable dip from the sweltering highs of April and May, where temperatures can soar above 40°C (104°F). As the region prepares for the cooler months ahead, September offers a perfect blend of warmth and refreshing breezes, making it an ideal time to explore its stunning landscapes and rich cultural heritage.
In September, Chiang Dao experiences significant rainfall, with 214 mm (8.4 in) of precipitation over 23 days. This marks a continuation of the monsoon season, following the peak of August, which recorded an impressive 316 mm (12.4 in). As the wettest months of the year, June through September account for the majority of the annual precipitation, illustrating a trend of increasing rainfall leading up to September, before it begins to taper off in October. The consistent number of rainy days this month further underscores the area's tropical climate and the importance of these seasonal rains for local agriculture and ecosystem health.
In Chiang Dao, Thailand, September experiences a noteworthy humidity level of 83%, maintaining the high humidity trend typical for the peak of the rainy season. After a progressive rise from the drier months of January through April, where humidity levels hovered between 36% and 51%, the climate shifts dramatically in May, reaching 63%. This increase continues through the summer, hitting a peak of 91% in August. September, while slightly lower than August, still reflects a tropical landscape characterized by lush greenery and frequent rain. As the year transitions into October, humidity drops to 67%, marking the beginning of the gradual decline, but September remains a quintessentially humid month that defines the monsoon experience in this lush haven.
In September, the UV Index in Chiang Dao, Thailand, remains high, reaching a level of 14 in the extreme category, with a burn time of just 10 minutes. This trend of elevated UV exposure continues from the previous months of August and July, where the index also peaked at 14. The region experiences a consistent period of intense sun exposure throughout these late summer months. As the UV Index begins to slowly decline in October, dipping to 13, it’s crucial to stay vigilant about sun protection during this peak period. For more detailed information on UV levels year-round, visit Chiang Dao UV Index.
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September in Chiang Dao, Thailand, brings a delightful 263 hours of sunshine, making it a perfect transition from the warmer summer months. Following the peak sunshine in March and consistent brightness through May, the days start to shorten slightly as monsoon season approaches. Despite this dip, September remains vibrant compared to the quieter August, which recorded only 232 hours of sun. As the year progresses, the sun gradually reasserts its dominance, with October expected to deliver 278 hours. This steady pattern underscores Chiang Dao's unique climate, inviting both travelers and locals to revel in the captivating beauty of this serene destination.
As September rolls around in Chiang Dao, Thailand, the chances of basking in sunny weather dip to a modest 19%. This shift marks a stark contrast to the sun-soaked months of January through April, where the likelihood of sunshine peaks impressively at 69% to 85%. Following the dry season, however, the monsoon begins to exert its influence, leading to significantly cloudier and rainier days. As we transition from the sweltering heat of summer to the refreshing rains, sunshine becomes a precious rarity, with October and November offering only slight improvements. Travelers seeking bright days in September might want to prepare for the unpredictable nature of this transitional month, filled more often with the sounds of rain than the warmth of the sun.
In September, Chiang Dao experiences a delightful continuation of its 12 hours of daylight, aligning with the peak of the rainy season. As the year progresses from the long days of May to July, where sunshine stretches to 13 hours, daylight begins to gradually wane. This month marks a subtle shift, hinting at the approach of the shorter days of autumn. However, compared to the earlier months, September still provides ample opportunity for outdoor exploration amidst the vibrant greenery nourished by the monsoon rains. As the days grow shorter in October, travelers can enjoy the lingering warmth of the light that characterizes Chiang Dao's enticing charm during this transitional period.
As September rolls into Chiang Dao, the gentle winds begin to whisper a softer tune, with average speeds dipping to 0.9 m/s (2 mph). This marks a noticeable decline from the slightly breezier months preceding it, as the summer's heat transitions into a more tranquil atmosphere. Comparatively, the wind during the earlier months of the year typically dances around 1.2 to 1.4 m/s, delivering a refreshing embrace to those basking in the lush landscapes. As October follows suit with a similar calm, visitors can savor the serenity of this season, where the ever-present mountains stand still, illuminated by the golden hue of the sun, inviting tranquility and reflection in the stunning surroundings of Chiang Dao.
Weather in Chiang Dao varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Chiang Dao, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather tends to be much warmer and more humid, with temperatures ranging from a minimum of 19°C (67°F) to a maximum of 34°C (93°F) and an average of 26°C (79°F). This month also experiences significant precipitation, with 214 mm (8.4 in) falling over 23 days, resulting in a humidity level of 83%. In contrast, January brings cooler temperatures, with a minimum of 7°C (46°F) and an average of 21°C (70°F), peaking at 33°C (91°F). Rainfall is scarce in January, totaling only 23 mm (0.9 in) over 3 days, and the humidity drops to a more comfortable 51%. For more details on January weather, you can visit Chiang Dao weather in January.
September and February present contrasting weather patterns. In September, temperatures range from a minimum of 19°C (67°F) to a maximum of 34°C (93°F), with an average of 26°C (79°F). This month is characterized by high humidity at 83% and significant precipitation, totaling 214 mm (8.4 in) over 23 days, making it one of the wetter months. In stark contrast, February experiences milder weather, featuring a minimum temperature of 9°C (49°F) and a maximum of 35°C (96°F), with an average of 22°C (73°F). It boasts a much drier climate, with only 5 mm (0.2 in) of precipitation and no rainy days, resulting in lower humidity levels at 46%. For more specifics on February weather patterns, you can visit Chiang Dao weather in February.
In comparing the weather of September and March, notable differences emerge. September experiences warmer minimum temperatures averaging around 19°C (67°F) and can reach a maximum of 34°C (93°F), while March begins with a cooler minimum of 12°C (54°F) but has the potential to reach an intense maximum of 39°C (102°F). Precipitation is significantly higher in September, with a total of 214 mm (8.4 in) spread over 23 days, contrasting sharply with March, which sees only 3 mm (0.1 in) of rain on just 1 day. Additionally, September has a high humidity level at 83%, whereas March enjoys a much drier atmosphere with only 38% humidity. For more details on the March weather, check out Chiang Dao weather in March.
When comparing the weather in September and April, several notable differences emerge. September tends to be warmer overall, with average temperatures reaching 26°C (79°F) and a maximum of 34°C (93°F), while April averages slightly higher at 28°C (82°F) but can peak dramatically at 40°C (104°F). However, September is characterized by significantly higher humidity at 83% and much more precipitation, accumulating 214 mm (8.4 in) over 23 days. In contrast, April enjoys drier conditions, with only 46 mm (1.8 in) of rain falling over just 6 days, leading to lower humidity levels of 36%. For more information on April weather specifics, visit Chiang Dao weather in April.
When comparing the weather in September and May, September tends to be slightly cooler, with average temperatures ranging from a minimum of 19°C (67°F) to a maximum of 34°C (93°F). In contrast, May experiences higher temperatures, with a minimum of 20°C (69°F) and a peak reaching up to 40°C (105°F). Moreover, September is considerably wetter, receiving a substantial 214 mm (8.4 in) of precipitation over 23 days, while May sees a much drier climate with only 71 mm (2.8 in) spread across 12 days. Humidity levels also vary, as September is more humid at 83%, compared to May’s 63%. For more detailed information, you can refer to Chiang Dao weather in May.
In comparing the weather of September and June, September typically brings slightly cooler temperatures, with a minimum of 19°C (67°F) and an average of 26°C (79°F), while June experiences higher lows, starting at 22°C (72°F) and averaging around 27°C (81°F). June tends to be drier overall, with 177 mm (7.0 in) of precipitation over 21 days compared to September's 214 mm (8.4 in) spread over 23 days. Additionally, June's maximum temperatures can reach up to 36°C (98°F), making it slightly hotter than September’s peak of 34°C (93°F). Despite the warmer conditions, humidity remains high in both months, with September at 83% and June at 81%. For a detailed look at June's weather, you can visit Chiang Dao weather in June.
In comparing the weather between September and July, both months present warm temperatures but with notable differences. September features a minimum temperature of 19°C (67°F) and a maximum of 34°C (93°F), while July is slightly warmer with a minimum of 21°C (71°F) and a peak of 37°C (99°F). Precipitation is more intense in July, totaling 233 mm (9.2 in) compared to September's 214 mm (8.4 in), although both months experience rainfall on roughly 23 days. Remarkably, both months share the same high humidity level of 83%, contributing to a humid feeling in the air. For a closer look at the specifics of July in a different region, you can visit Chiang Dao weather in July.
September's weather shows a slight decrease in both minimum and maximum temperatures compared to August, with September's lows at 19°C (67°F) and highs reaching 34°C (93°F), whereas August ranges from 21°C (71°F) to 35°C (95°F). Despite having the same average temperature of 26°C (79°F), September experiences lower humidity at 83% compared to August's more humid 91%. Precipitation also reduces in September with 214 mm (8.4 in) over 23 days, compared to August's 316 mm (12.4 in) across 26 days. For more detailed information about the weather in August, check Chiang Dao weather in August.
In comparing the weather between September and October, September experiences slightly higher temperatures, with a minimum of 19°C (67°F) and an average of 26°C (79°F), peaking at 34°C (93°F). Additionally, September is characterized by significantly higher rainfall, totaling 214 mm (8.4 in) across 23 days, contributing to a humidity level of 83%. In contrast, October sees a slight decrease in temperatures with a minimum of 18°C (65°F), an average of 25°C (77°F), and a maximum of 33°C (92°F). It also enjoys reduced precipitation of 136 mm (5.4 in) over 18 days, resulting in a lower humidity level of 67%. For a more detailed look at October weather specifics, you can find more information here: Chiang Dao weather in October.
September weather is characterized by higher temperatures, with a minimum of 19°C (67°F) and an average of 26°C (79°F), peaking at 34°C (93°F). The month experiences significant rainfall, totaling 214 mm (8.4 in) over 23 days, resulting in high humidity levels averaging 83%. In contrast, November sees a drop in temperatures, with a minimum of 14°C (57°F), an average of 23°C (74°F), and a maximum of 33°C (91°F). Rainfall is considerably less in November, with only 29 mm (1.2 in) falling over just 8 days, leading to a more comfortable humidity level of 60%. For more details, you can explore Chiang Dao weather in November.
September in Chiang Dao is characterized by warm and humid weather, with average temperatures ranging from a minimum of 19°C (67°F) to a maximum of 34°C (93°F). The month sees significant rainfall, accumulating around 214 mm (8.4 in) over 23 days, contributing to a high humidity level of 83%. In contrast, December brings a cooler and drier climate, with temperatures ranging from a minimum of 6°C (44°F) to an average of 20°C (69°F) and a maximum of 31°C (89°F). Precipitation drops substantially to only 18 mm (0.7 in) over just 2 days, and humidity levels decrease to 56%. For more information, you can check Chiang Dao weather in December.
As September unfolds in Chiang Dao, it brings a noticeable shift in weather patterns compared to other months. With temperatures peaking at a warm 34°C (93°F) and an average of 26°C (79°F), the warmth is palpable, yet the increased humidity at 83% and frequent rainfall—totaling 214 mm over 23 days—create a lush, vibrant landscape. This month stands out as a time of transition, where the monsoon season saturates the region, enhancing the natural beauty and inviting travelers to experience a different side of this enchanting destination. For a deeper understanding of what to expect throughout the year, check out the details on Chiang Dao Climate.