Last updated: August 21, 2025
In September, Trongsa, Bhutan, experiences a captivating blend of mild temperatures and frequent rain. The maximum temperature hovers around 20°C (68°F), with an average of 12°C (55°F) and dropping to a minimum of 5°C (41°F) at night. Rainfall is significant, totaling approximately 439 mm (17.3 in) over 29 days, creating a lush and vibrant landscape. High humidity levels of 92% contribute to the region's rich biodiversity, making it a unique time to explore the natural beauty and cultural wonders of this enchanting locale.
September in Trongsa, Bhutan marks a transition into milder temperatures as summer wanes. With minimums around 5°C (41°F) and average highs of 20°C (68°F), this month offers a pleasant reprieve from the summer heat. The average temperature settles at 12°C (55°F), providing comfortable conditions ideal for exploration. As the region gears up for autumn, September's weather stands out as a balanced blend of warmth and coolness, paving the way for the crisp air that will arrive in October. This notable shift from the preceding months showcases the region's unique climate dynamics, making it an inviting time to experience the beauty of Trongsa's landscape.
In September, Trongsa experiences a significant decrease in precipitation compared to the earlier summer months, with a notable 439 mm (17.3 in) of rain over 29 days. This substantial amount still reflects the tail end of the monsoon season, following July’s peak of 744 mm (29.3 in) and August’s 559 mm (22.0 in). The rain serves to nourish the lush landscapes of Bhutan, while the shorter prevalence of rainy days indicates a shift towards drier conditions as autumn approaches. As the year progresses, rainfall will continue to decline sharply, paving the way for the crisp, clear skies typical of October and November.
September in Trongsa, Bhutan, marks a continuation of the region's high humidity, recording a notable 92%. This aligns closely with the preceding months of July and August, which also showcased elevated humidity levels, reflecting the influence of the monsoon season. The humidity begins to taper from the peak months of June through August, where levels reached an impressive 88% to 93%. Following September, humidity starts its gradual decline as autumn approaches, with October measuring 89%. This trend reveals a dynamic shift where the lush, verdant landscapes are nourished by humidity, setting the stage for the vibrant fall colors to come.
September in Trongsa, Bhutan, sees a UV Index of 14, categorized as extreme, with a burn time of just 10 minutes. This month marks a continuation of the heightened UV exposure observed throughout the summer, reflecting a trend of consistently high UV levels from March through September. As the transition to autumn begins, the index slightly decreases, yet it remains critical for residents and visitors to take precautionary measures. The UV Index here peaks significantly from March to August, underscoring the importance of sun safety in this stunning region. For detailed insights and tips on how to protect yourself, you can check the comprehensive guide at Trongsa UV Index.
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As September unfolds in Trongsa, Bhutan, it ushers in a delightful 252 hours of sunshine, offering a welcome transition from the rainfall of the previous months. Following a brief lull in July's 190 hours, sunlight begins to regain momentum, peaking through August before settling into a comfortable rhythm this month. September balances warmth and clarity, setting the stage for October's impressive 308 hours ahead. This trend illustrates the gradual shift toward clearer skies as autumn approaches, inviting both locals and travelers to bask in the beauty of Bhutan’s vibrant landscapes and rich culture.
In September, Trongsa, Bhutan experiences a modest 16% chance of sunny weather, marking a slight uptick from the dismal summer months, where the chances plummet to as low as 1% in August. As the monsoon recedes, the likelihood of sunshine begins to improve, laying the groundwork for a transition into the more favorable weather conditions of October and November, which boast chances of 25% and 28%, respectively. While September's sun may be limited compared to the brighter months ahead, it offers a refreshing break from the heavy rains, creating an opportunity for visitors to enjoy the breathtaking landscapes of this enchanting region amidst the lingering clouds.
In Trongsa, Bhutan, September marks a gentle transition in daylight duration, as the region enjoys 12 hours of sunlight. This follows a summer peak, where the days reached a vibrant 13 hours from May through August, providing ample time for outdoor activities and appreciation of the stunning landscapes. As the year progresses into October, daylight begins to wane again, descending to 11 hours, signaling the onset of autumn. This rhythmic fluctuation not only highlights the region's climatic shifts but also offers a unique opportunity for residents and visitors alike to embrace the gradual changes in nature and the beauty that each season unfolds.
In September, the wind in Trongsa, Bhutan, continues the gentle trend established over the summer months, maintaining an average speed of 1.0 m/s (2 mph). As the monsoon recedes, this light breeze offers a refreshing reprieve, perfectly complementing the serene landscape. Throughout the year, wind speeds remain relatively consistent, fluctuating only slightly from 0.9 m/s in July to a peak of 1.2 m/s in April. This consistent atmospheric flow not only enhances the tranquility of the region but also provides a backdrop for the breathtaking views, making September a delightful time to experience the quiet charm of Bhutanese highlands.
Weather in Trongsa varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Trongsa, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather conditions. In September, temperatures range from a minimum of 5°C (41°F) to a maximum of 20°C (68°F), with an average of 12°C (55°F). However, this month is marked by significant rainfall, with 439 mm (17.3 in) of precipitation over 29 days and high humidity at 92%. In contrast, January experiences much colder temperatures, with lows dropping to -21°C (-6°F) and averaging around -2°C (28°F), peaking at 12°C (54°F). The winter month features significantly less rainfall, only 45 mm (1.8 in) over 11 days, accompanied by lower humidity at 70%. For more detailed insights into January weather, visit Trongsa weather in January.
September and February present stark contrasts in weather conditions. In September, temperatures range from a mild 5°C (41°F) to a comfortable 20°C (68°F), with an average of 12°C (55°F). The month sees significant precipitation, totaling 439 mm (17.3 in), spread over 29 days, and the humidity remains high at 92%. In contrast, February experiences much colder temperatures, with a minimum of -16°C (3°F) and a maximum of 13°C (55°F), averaging -1°C (31°F). Precipitation is notably lower at 104 mm (4.1 in) across 19 days, and the humidity drops to 71%. For more detailed insights, you can check out Trongsa weather in February.
When comparing September and March weather, we see distinct differences in temperature, precipitation, and humidity. September boasts milder temperatures, with a minimum of 5°C (41°F) and an average of 12°C (55°F), peaking at a comfortable 20°C (68°F). However, it also experiences significant rainfall, with 439 mm (17.3 in) spread over 29 days and a high humidity level of 92%. In contrast, March is considerably colder, featuring temperatures that dip as low as -12°C (11°F), with an average of 2°C (37°F) and a maximum of 16°C (62°F). While March has reduced rainfall at 207 mm (8.1 in) over 27 days, it also comes with lower humidity at 50%. For more detailed information on March weather, you can visit Trongsa weather in March.
September and April present distinct weather patterns, reflecting transitional seasons. In September, temperatures range from a minimum of 5°C (41°F) to a maximum of 20°C (68°F), with an average of 12°C (55°F). This month is characterized by high humidity at 92% and significant rainfall, accumulating 439 mm (17.3 in) over 29 days. In contrast, April experiences cooler temperatures, with a minimum of -7°C (19°F) and a maximum of 16°C (62°F), averaging 6°C (43°F). Precipitation in April is notably lower, totaling 218 mm (8.6 in), yet it also spans 29 days, although the humidity is significantly reduced to 45%. For more detailed insights, check out Trongsa weather in April.
September and May present contrasting weather patterns, despite sharing similar maximum temperatures. September typically sees a milder average maximum of 20°C (68°F), but the month is characterized by significantly higher rainfall, totaling 439 mm (17.3 in) over 29 days, resulting in a high humidity level of 92%. In contrast, May offers slightly cooler average temperatures, with a minimum of 0°C (31°F) and an average of 9°C (49°F), while rainfall is lower at 335 mm (13.2 in) over 30 days, accompanied by a more comfortable humidity of 76%. These differences create distinct atmospheres in each month, making September feel much wetter and more humid compared to the drier conditions of May. For a closer look at weather specifics, check out Trongsa weather in May.
When comparing the weather in September and June, we notice some intriguing similarities and differences. Both months have a minimum temperature of 5°C (41°F), but June tends to be slightly warmer overall, with an average temperature of 13°C (55°F) compared to September's 12°C (55°F), and a maximum temperature of 21°C (71°F) versus September's 20°C (68°F). In terms of precipitation, June is wetter, receiving 542 mm (21.3 in) over 30 days, while September has 439 mm (17.3 in) across 29 days. Humidity levels are also noteworthy, with September at 92% and June slightly lower at 88%. For more detailed insights, you can check Trongsa weather in June.
When comparing the weather of September and July, there are notable differences in temperature and precipitation. September features a minimum temperature of 5°C (41°F), with an average of 12°C (55°F) and a maximum of 20°C (68°F). In contrast, July has slightly warmer temperatures with a minimum of 9°C (48°F), an average of 14°C (57°F), and a maximum of 21°C (71°F).
Precipitation levels also differ significantly; September experiences 439 mm (17.3 in) of rain over 29 days, while July sees a higher accumulation of 744 mm (29.3 in) across 31 days. Both months exhibit high humidity, with September at 92% and July at 93%. For more details about July weather conditions, you can visit Trongsa weather in July.
In comparing the weather between August and September, September tends to be cooler with a minimum temperature of 5°C (41°F) and an average of 12°C (55°F), while August features slightly warmer temperatures, with a minimum of 8°C (47°F) and an average of 14°C (57°F). Although September has a maximum temperature of 20°C (68°F) compared to August's 21°C (70°F), the precipitation levels are notable. September receives approximately 439 mm (17.3 in) of rainfall over 29 days, while August sees a higher precipitation total of 559 mm (22.0 in) across 31 days. Both months experience high humidity levels of 92%, but September's cooler temperatures may feel more refreshing amidst the consistent rainfall. For further details, you can check Trongsa weather in August.
September and October present a notable transition in weather patterns. In September, temperatures range from a mild 5°C (41°F) to a maximum of 20°C (68°F), making it generally warmer with higher precipitation at 439 mm (17.3 in) spread over 29 days and high humidity at 92%. In contrast, October brings cooler temperatures, with a minimum of -3°C (26°F) and an average of 9°C (49°F), while the maximum temperature remains somewhat steady at 19°C (67°F). Precipitation significantly decreases to 171 mm (6.7 in) over 22 days, and humidity slightly drops to 89%. For more detailed insights into October weather, you can check out Trongsa weather in October.
September weather is notably warmer and more humid compared to November. With average temperatures ranging from a minimum of 5°C (41°F) to a maximum of 20°C (68°F), it provides a mild climate, albeit accompanied by significant rainfall totaling 439 mm (17.3 in) over 29 days. In contrast, November sees much cooler temperatures, with a minimum of -6°C (22°F) and an average temperature of just 4°C (40°F), while maximum temperatures reach only 16°C (61°F). Additionally, precipitation drops significantly to 52 mm (2.0 in) over 16 days and humidity decreases to 86%. For a more detailed look at the weather conditions in November, you can check Trongsa weather in November.
September and December showcase contrasting weather patterns. In September, temperatures range from a mild 5°C (41°F) at night to a comfortable high of 20°C (68°F) during the day, accompanied by significant rainfall totaling 439 mm (17.3 in) across 29 days and high humidity at 92%. In stark contrast, December experiences much colder conditions, with nighttime lows plummeting to -14°C (8°F) and averaging just 1°C (34°F) during the day. Precipitation decreases dramatically to only 44 mm (1.8 in) over 11 days, and humidity levels drop to 83%. For more specific weather conditions, refer to Trongsa weather in December.
As September unfolds in Trongsa, the weather takes on a distinctly damp and cool character, making it quite different from the preceding summer months. The average temperature hovers around a brisk 12°C (55°F), with maximum temperatures rarely surpassing a comfortable 20°C (68°F). This month is notably marked by substantial precipitation, with September experiencing nearly half of the month drenched in rain, which contributes to the region's lush greenery but also results in a staggering humidity level of 92%. Such conditions create a unique atmosphere that appeals to adventurers and nature lovers alike. For more insights into how Trongsa's weather conditions evolve throughout the year, explore Trongsa Climate.