Last updated: August 27, 2025
In September, Mae Hong Son, Thailand, experiences a dynamic blend of weather characterized by warm temperatures and significant rainfall. With maximums reaching 34°C (94°F) and an average of 25°C (78°F), the air remains lush yet comfortable, while minimums hover around 20°C (68°F) during cooler nights. This month sees 196 mm (7.7 in) of precipitation over approximately 24 days, contributing to the region's high humidity of 83%. The frequent rains create a vibrant landscape, perfect for exploring the lush surroundings and experiencing the unique charm of this northern province.
In September, Mae Hong Son experiences a gentle transition towards cooler temperatures, making it an ideal time for outdoor exploration. The min temperature hovers around 20°C (68°F), while the average settles at a comfortable 25°C (78°F), providing a pleasant escape from the summer heat. The max temperature peaks at 34°C (94°F), slightly cooler than the sweltering heights of the preceding months. This pattern reflects a gradual dip in warmth, creating a more inviting climate for tourists looking to soak in the natural beauty of the region during this lush, green period. As the month progresses, the pristine landscapes of Mae Hong Son come alive, perfectly complementing the mild and refreshing weather.
In September, Mae Hong Son experiences significant rainfall, accumulating 196 mm (7.7 in) over 24 days. This marks a noticeable dip in precipitation compared to the previous months of July and August, which are marked by their peak monsoon conditions, delivering 255 mm and 308 mm respectively. The transition into fall is highlighted by a decline in both the overall rainfall amount and the number of rainy days, yet September still retains a substantial water contribution, further saturating the lush landscape before the dry season approaches. As this month unfolds, the persistent rain nurtures the region's verdant beauty, showcasing nature's resilience amid fluctuating weather patterns.
In September, Mae Hong Son experiences a notable humidity level of 83%, indicating a continuation of the wet season that begins in May. As the month unfolds, the humidity reflects the peak of the rainy season, peaking just below the 91% recorded in August. This substantial moisture in the air contributes to the lush landscapes, making it an ideal time for nature enthusiasts to explore the region's stunning scenery. Following the high humidity of these summer months, there's a gradual decline as the district transitions into October, where humidity drops to 67%. The trend clearly illustrates how Mae Hong Son's climate fluctuates significantly from the dry winter months of January and February, with humidity plummeting to 46% during the dry season. This seasonal shift not only highlights the region's diverse climate but also sets the stage for vibrant flora and fauna that thrive in the moisture-laden environment of September.
In September in Mae Hong Son, Thailand, the UV Index remains at a striking 14, signifying an extreme level of exposure that requires vigilance. This consistency in the UV Index, which has peaked at 14 since May, indicates a summer-like intensity that persists throughout the wet season. With a burn time of only 10 minutes, it's crucial to take precautions when outside. As the year transitions into the cooler months, the UV levels will gradually decline, but for now, the extreme sunlight calls for effective sun protection measures. For more detailed information on UV index trends year-round, visit Mae Hong Son UV Index.
UV Risk Categories
As September arrives in Mae Hong Son, Thailand, the region welcomes 262 hours of glorious sunshine, providing a beautiful backdrop for autumn adventures. After a dip in sunshine hours during the rainy months of July and August, which recorded just 227 and 211 hours respectively, September signals a return to brighter days. This revitalizing shift reflects a gradual increase as the sun starts to make its presence felt again before peaking in the later months, with October and November showcasing 287 and 301 hours of sunshine. The promise of warmer, sunnier days makes September a delightful time to explore the lush landscapes and vibrant culture of this enchanting destination.
In Mae Hong Son, Thailand, the likelihood of sunny weather dramatically shifts throughout the year. From a bright 76% chance in January, the sun shines even more brilliantly in February and March, peaking at an impressive 87%. However, as the calendar moves towards September, sunshine becomes a rare commodity, with only a 16% likelihood of enjoying clear skies. This trend highlights the onset of the rainy season, where the heavy clouds take precedence over sun-soaked days. As autumn approaches, the prospects improve again in October, climbing to 26%, but for September, visitors should be prepared for a much gloomier, wet experience.
As September rolls into Mae Hong Son, Thailand, the days feature a pleasing 12 hours of daylight, signaling a transition to shorter days as the year progresses. Following a peak of 13 hours during the height of summer months, daytime length dips slightly, paralleling the gradual shift from the intense heat of the rainy season to the cooler autumn days. Interestingly, this rhythm of daylight reflects a steady pattern throughout the year: early months boast around 11 to 13 hours, while the latter months, leading into winter, see a decline to about 10 to 11 hours. This gradual ebb and flow creates a beautiful backdrop for visitors and locals alike, enhancing the charm of Mae Hong Son's natural beauty as the seasons shift.
As September unfolds in Mae Hong Son, Thailand, a subtle shift in the gentle breezes can be felt, with the average wind speed dipping to 1.1 m/s (2 mph). This decline marks the lowest point of the year, following a gradual trend of modest winds from the summer months. While the air remains relatively calm, this tranquil atmosphere enhances the serene beauty of the region, inviting visitors to bask in the lush landscapes and captivating scenery. As October approaches, the winds remain steady but faintly whisper their way to an even calmer 1.0 m/s (2 mph), signaling the onset of cooler weather and a tranquil transition into the heart of the autumn season.
Weather in Mae Hong Son varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Mae Hong Son, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures range from a minimum of 20°C (68°F) to a maximum of 34°C (94°F), with an average temperature of 25°C (78°F). The month is characterized by high humidity at 83% and significant rainfall, accumulating 196 mm (7.7 in) over 24 days. In contrast, January offers a much cooler climate with temperatures dipping to a minimum of 7°C (45°F) and peaking at 32°C (90°F), averaging 20°C (69°F). Precipitation is minimal in January, with only 22 mm (0.9 in) falling over just three days, and humidity drops to a more comfortable 51%. For more details, check out Mae Hong Son weather in January.
In September, the weather tends to be quite humid and warm, with temperatures ranging from a minimum of 20°C (68°F) to a maximum of 34°C (94°F) and an average of 25°C (78°F). The month sees substantial rainfall, with 196 mm (7.7 in) of precipitation spread across 24 days, creating a humid atmosphere with an average humidity level of 83%. In contrast, February offers a much drier experience, with temperatures fluctuating from a cooler 9°C (49°F) at night to a high of 35°C (95°F) during the day, averaging 22°C (72°F). February boasts minimal precipitation, with only 4 mm (0.2 in) and no rainy days, leading to a significantly lower humidity level of 46%. For detailed weather insights in February, refer to Mae Hong Son weather in February.
In September, the weather is characterized by warm temperatures ranging from a minimum of 20°C (68°F) to a maximum of 34°C (94°F), with an average of 25°C (78°F). This month also sees significant rainfall, with 196 mm (7.7 in) falling over 24 days, resulting in high humidity levels of 83%. In contrast, March experiences a wider temperature range, with minimums at 12°C (54°F) and maximums peaking at a scorching 39°C (103°F), while averaging 26°C (79°F). Surprisingly, March has almost no precipitation at just 1 mm (0.0 in) over 0 days, leading to a much drier climate and lower humidity at 38%. For more detailed insights about the weather in March, you can check Mae Hong Son weather in March.
When comparing the weather in September and April, distinct differences become apparent. September features a milder average temperature of 25°C (78°F) with highs reaching 34°C (94°F), accompanied by significant humidity at 83% and frequent rainfall, totaling 196 mm (7.7 in) over 24 days. In contrast, April boasts a higher average temperature of 28°C (82°F) and can reach scorching highs of 40°C (104°F), but it experiences much lower precipitation of only 36 mm (1.4 in) over just 6 days and significantly lower humidity at 36%. For an in-depth look at the conditions in April, check out Mae Hong Son weather in April.
In comparing the weather between September and May, we notice some distinct differences. September typically enjoys a temperature range from a minimum of 20°C (68°F) to a maximum of 34°C (94°F), while May tends to be hotter, with temperatures soaring from 20°C (68°F) to as high as 40°C (104°F). Despite the warmth, May experiences less rainfall, averaging 114 mm (4.5 in) over 13 days compared to September's 196 mm (7.7 in) over 24 days. Additionally, humidity levels are higher in September at 83%, while May has a comparatively lower humidity level of 63%. For a more detailed look at the weather in May, you can check Mae Hong Son weather in May.
In comparing the weather of September and June, both months experience warm temperatures, though June is slightly warmer overall. September has a minimum temperature of 20°C and an average of 25°C, peaking at 34°C, while June's temperatures range from a minimum of 21°C to an average of 26°C, with a maximum of 35°C. Precipitation is more significant in September, totaling 196 mm over 24 days, compared to June's 173 mm across 26 days. While both months exhibit high humidity levels, September is slightly higher at 83% compared to June's 81%. For a detailed look at June weather, you can check out Mae Hong Son weather in June.
In comparing the weather of September and July, both months exhibit warm temperatures, with July having a slightly higher minimum of 21°C (70°F) compared to September's 20°C (68°F) and a maximum reaching 35°C (96°F) versus September's 34°C (94°F). The average temperature remains the same at 25°C (78°F) for both months. However, July experiences more precipitation at 255 mm (10.0 in) over 27 days, while September sees less rainfall at 196 mm (7.7 in) over 24 days. Both months maintain a high humidity level of 83%, contributing to the overall tropical feel of the region. For a more detailed look at July weather specifically, you can visit this link: Mae Hong Son weather in July.
In comparing the weather between August and September, September experiences slightly lower average temperatures, with a minimum of 20°C (68°F) and a maximum of 34°C (94°F), while August maintains a minimum of 21°C (70°F) and the same maximum of 34°C (93°F). Both months share a similar average temperature of around 25°C (77°F), but September sees a significant decrease in precipitation, receiving 196 mm (7.7 in) over 24 days compared to August's 308 mm (12.1 in) over 30 days. Additionally, humidity is lower in September at 83%, compared to August's higher humidity level of 91%. For more detailed insights, you can visit Mae Hong Son weather in August.
In September, temperatures range from a minimum of 20°C (68°F) to a maximum of 34°C (94°F), with an average of 25°C (78°F). This month also experiences significant rainfall, totaling 196 mm (7.7 in) across 24 days, contributing to a high humidity level of 83%. In contrast, October sees a slight drop in temperature with a minimum of 19°C (66°F) and a maximum of 33°C (91°F), while the average remains the same at 25°C (77°F). Precipitation decreases to 134 mm (5.3 in) over 19 days, and humidity lowers to 67%. For a more detailed look at the weather conditions, you can check Mae Hong Son weather in October.
September and November exhibit notable differences in weather conditions. In September, temperatures range from a minimum of 20°C (68°F) to a maximum of 34°C (94°F), with an average of 25°C (78°F). The month is characterized by high humidity at 83% and significant rainfall, totaling 196 mm (7.7 in) over 24 days. In contrast, November sees cooler temperatures, with a minimum of 14°C (57°F) and an average of 23°C (74°F), peaking at 33°C (91°F). This month benefits from much less precipitation, with only 31 mm (1.2 in) falling over just 6 days, and lower humidity at 60%. For more detailed information, you can check Mae Hong Son weather in November.
September and December present stark contrasts in weather conditions. In September, temperatures range from a minimum of 20°C (68°F) to a maximum of 34°C (94°F), with an average temperature of 25°C (78°F). This month is also characterized by high humidity at 83% and significant rainfall, totaling 196 mm (7.7 in) over 24 days. In contrast, December sees a much cooler climate, with temperatures ranging from a low of 6°C (44°F) to a high of 32°C (89°F), and an average of 20°C (69°F). Precipitation drops dramatically to just 11 mm (0.4 in) over only 3 days, accompanied by considerably lower humidity at 56%. For more detailed insights on December weather, check out Mae Hong Son weather in December.
September in Mae Hong Son brings a unique blend of warmth and moisture, making it distinct from the drier months. With an average temperature that hovers around a comfortable 25°C, the days can reach highs of up to 34°C, set against a backdrop of high humidity at 83%. However, the real hallmark of September is its abundant rainfall, with significant precipitation occurring on nearly every day of the month, leading to a dramatic transformation in the lush green landscape. This weather pattern not only influences the daily activities of locals and travelers alike but also marks a vibrant peak in the region's natural beauty. For a deeper dive into how September's weather compares with other times of the year, check out Mae Hong Son Climate.