September Weather in Mae Hong Son, Thailand

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.

September Temperature in Mae Hong Son

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.

September Weather in Mae Hong Son: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Mae Hong Son, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mae Hong Son, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec697179828279777777767468
Data source: Temperature data for Mae Hong Son generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Mae Hong Son

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.

September Precipitation Trends in Mae Hong Son

The chart displays monthly precipitation patterns in Mae Hong Son, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Mae Hong Son, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec2251361141732553081961343111
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Mae Hong Son

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.

September Average Humidity in Mae Hong Son

This chart illustrates the average monthly humidity levels in Mae Hong Son, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Mae Hong Son is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec51%46%38%36%64%81%83%91%83%67%61%56%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mae Hong Son

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.

Maximum UV Index Levels in Mae Hong Son for September

The chart shows the monthly maximum UV Index (UVI) for Mae Hong Son in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Mae Hong Son typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9101313141414141412109
Data source: Mae Hong Son September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Mae Hong Son

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.

Monthly Sunshine Duration in Mae Hong Son: September Highlighted

The September sunshine duration represents the total number of hours Mae Hong Son experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec252h303h340h326h335h250h227h211h262h287h301h316h
Data source: Mae Hong Son September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Mae Hong Son During September

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.

Percentage of Sunny Days in September in Mae Hong Son

The chart illustrates the percentage of sunny days in Mae Hong Son throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Mae Hong Son experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec76%82%87%41%42%11%12%9%16%26%48%85%
Data source: Mae Hong Son September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Mae Hong Son in September

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.

Average Daylight Hours in Mae Hong Son for September

The chart illustrates the variation in daylight duration in Mae Hong Son throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 5m11h 30m12h 1m12h 34m13h 2m13h 15m13h 8m12h 44m12h 13m11h 40m11h 12m10h 58m
Data source: Mae Hong Son daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Mae Hong Son

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.

Average September Wind Speed in Mae Hong Son

The chart displays monthly wind speed patterns in Mae Hong Son, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec1.31.41.71.41.61.71.51.41.1 m/s1.01.01.2
Data source: Mae Hong Son September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Mae Hong Son Compares to Other Months

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.

Compare Mae Hong Son's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Mae Hong Son

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.