Last updated: August 21, 2025
In Trashigang, Bhutan, September brings a unique blend of temperatures and weather patterns. The maximum temperature reaches a comfortable 27°C (80°F), while the average settles at a mild 19°C (67°F), dipping to a cool 13°C (55°F) at night. This month is characterized by significant rainfall, with 503 mm (19.8 in) of precipitation spread across 29 days, leading to lush greenery and vibrant landscapes. The high humidity level of 92% creates a moist atmosphere, making it a prime time to experience the region's rich natural beauty, despite the frequent showers.
In September, Trashigang experiences a transition towards cooler temperatures as autumn sets in. The month typically sees minimum temperatures around 13°C (55°F), providing a comfortable start to the beginning of fall. With average highs peaking at 27°C (80°F), the days remain pleasantly warm, making it an ideal time for outdoor activities and exploration. Compared to the warmer summer months, September offers respite with an average temperature of 19°C (67°F), indicating a gradual decline in heat. As the landscape begins to change with the season, the weather in September is perfect for embracing the natural beauty of Bhutan.
In September, Trashigang experiences a significant rainfall, receiving 503 mm (19.8 in) over approximately 29 days. This month marks a noticeable decrease from the intense rains of July and August, yet still showcases a robust monsoon presence. The precipitation, while lower than peak months, reveals that September remains a crucial transitional period, bridging the heavy monsoons of summer and the drier autumn months ahead. As the landscape continues to flourish under this rainfall, the region prepares for the gradual shift towards a more serene climate in the coming months.
In September, Trashigang experiences a high level of humidity at 92%, maintaining the wet conditions established in the preceding months of July and August. This is part of a noticeable climactic trend throughout the summer, where humidity peaks between June and September, culminating in a peak during the monsoon season. Following September, humidity begins its slow decline, with values dropping to 89% in October. This pattern highlights a shift from the intense summer moisture to a drier climate as autumn approaches, creating a refreshing transition for residents and visitors alike.
In September, Trashigang experiences a UV Index of 13, categorized as extreme exposure, similar to the summer months of June, July, and August. With a burn time of just 10 minutes, the need for sun protection remains critical. This high level of UV exposure reflects a consistent trend from late spring through early autumn, warning residents and visitors alike to take precautions. As the sun remains intense even as the seasons change, those planning outdoor activities should stay vigilant about skin protection and seek shade whenever possible. For detailed insights, check out the Trashigang UV Index.
UV Risk Categories
As September rolls into Trashigang, Bhutan, the embrace of bright sunshine continues with approximately 257 hours of sunlight, placing it comfortably among the drier months. This slight decline from the vibrant summer months of July, which saw a dip to 211 hours, and August's 256 hours, signals a gradual transition into the earthy tones of fall. Notably, September's sunshine paves the way for a dramatic increase in October, where sunlight surges to 302 hours. Overall, the data reflects a year that begins with a promising sunlit start in January at 222 hours and gradually reaches its peak before tapering off into the cooler and cloudier months. This rhythm of light not only enhances the breathtaking scenery of Trashigang but also inspires a lively atmosphere throughout the region.
September in Trashigang, Bhutan, presents a modest 23% chance of sunny weather, reflecting a transition from the damp monsoon months of July and August, which plummet to an astonishing 1% and 3%, respectively. As the year progresses, the likelihood of sunshine starts to recover, with October offering a more promising 51%. This gradual return of sunny days following the monsoon encapsulates the shifting seasons, highlighting September as a month of potential yet tempered by lingering humidity. Nature begins to reawaken as the clouds gradually disperse, setting the stage for the clearer skies that follow in the ensuing autumn months.
In September, Trashigang, Bhutan enjoys a gradual transition as daylight duration starts to wane, with 12 hours of sunlight illuminating the landscape. This follows a vibrant summer where the region basked in up to 13 hours of daylight from May to August. As the days grow shorter, there is a subtle shift from the sunlit abundance of summer towards the crispness of autumn. The pattern observed throughout the year highlights a gentle ebb and flow of daylight, with the longest hours peaking in the summer months, while a return to 11 hours in October signals the impending approach of winter. This rhythmic cycle not only defines the unique climate of Trashigang but also sets the stage for the changing seasons ahead.
In September, the winds in Trashigang, Bhutan continue the gentle trend established throughout the summer months, maintaining an average speed of 0.9 m/s (2 mph). This slight breeze aligns with the consistently calm weather experienced since early summer, where wind speeds dipped from 1.1 m/s to 0.8 m/s in July and August. As the region transitions into autumn, the persistent softness of the wind suggests a tranquil climate, perfect for enjoying the serene beauty of the surrounding landscapes. Looking ahead to October, we can expect similar conditions, as the wind remains steady at 0.9 m/s, further marking this period as one of subdued yet picturesque charm in Trashigang.
Weather in Trashigang varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Trashigang, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present starkly contrasting weather conditions. In September, temperatures range from a minimum of 13°C (55°F) to a maximum of 27°C (80°F), with an average of 19°C (67°F). The month is characterized by high humidity at 92% and substantial precipitation, totaling 503 mm (19.8 in) over 29 days. In contrast, January experiences much colder temperatures, with a minimum of -3°C (27°F) and an average of 8°C (46°F), reaching a maximum of 20°C (69°F). The precipitation is significantly lower, totaling just 25 mm (1.0 in) across 8 days, and the humidity is more moderate at 70%. This dramatic shift emphasizes the transition from the wet, humid warmth of September to the cold, dry embrace of January. For more detailed information, check out Trashigang weather in January.
In September, temperatures range from a minimum of 13°C (55°F) to a maximum of 27°C (80°F), with an average of 19°C (67°F). The month is relatively wet, receiving a significant 503 mm (19.8 in) of precipitation over 29 days, contributing to a high humidity level of 92%. In contrast, February experiences a much cooler climate, with temperatures ranging from a minimum of -5°C (23°F) to a maximum of 21°C (70°F) and an average of 9°C (48°F). The precipitation is considerably lower at 56 mm (2.2 in) over just 12 days, resulting in a humidity of 71%. For more specific details on February weather, you can refer to Trashigang weather in February.
September and March exhibit distinct weather patterns, reflecting the transitional phases of late summer and early spring. In September, temperatures range from a minimum of 13°C (55°F) to a maximum of 27°C (80°F), with an average of 19°C (67°F). The month is characterized by high humidity at 92% and significant precipitation, totaling 503 mm (19.8 in) over 29 days. Conversely, March experiences cooler temperatures, ranging from a chilly 0°C (33°F) to a warmer maximum of 25°C (77°F), with an average of 12°C (53°F). The month has much less precipitation, accumulating 122 mm (4.8 in) over 20 days, and a significantly lower humidity of 50%. For more detailed information on March weather, you can check Trashigang weather in March.
In comparing the weather between September and April, we see notable differences in temperature and precipitation. September typically features warmer temperatures, with an average of 19°C (67°F) and maximum highs reaching 27°C (80°F), while April has a cooler average of 14°C (58°F) and maximums up to 24°C (75°F). Additionally, September is marked by significantly higher precipitation, totaling 503 mm (19.8 in) over 29 days, compared to April's 193 mm (7.6 in) spread across 24 days. The humidity in September is notably high at 92%, in stark contrast to April's much drier atmosphere, with a humidity level of only 45%. For more detailed insights, you can explore Trashigang weather in April.
In comparing the weather between September and May, there is a notable difference in temperatures and precipitation levels. September experiences a higher average temperature of 19°C (67°F) compared to May's 17°C (62°F), with maximums reaching up to 27°C (80°F) in September, just slightly higher than May's peak of 26°C (79°F). However, September also sees significantly more precipitation, with 503 mm (19.8 in) falling over 29 days, while May has only 352 mm (13.9 in) over the same number of days. The humidity is higher in September at 92%, in contrast to May's 76%, making September feel more humid overall. For more specifics, you can check Trashigang weather in May.
When comparing the weather in September and June, it's clear that both months share a similar temperature range, with September experiencing slightly warmer maximums at 27°C (80°F) compared to June's 26°C (80°F). However, June tends to see more precipitation, with a total of 628 mm (24.7 in) over 30 days, while September has 503 mm (19.8 in) spread across 29 days. Additionally, June has a slightly lower humidity level (88%) compared to September's high humidity of 92%. For a more detailed look at June's weather patterns, you can check out Trashigang weather in June.
In comparing the weather of September and July, we see some notable differences despite similar average maximum temperatures, both reaching 27°C (80°F). September features a slightly cooler minimum temperature of 13°C (55°F) compared to July’s 14°C (58°F), and it averages 19°C (67°F) versus July's 20°C (68°F). However, July is significantly wetter, with a staggering 931 mm (36.7 in) of precipitation over 31 days compared to September's 503 mm (19.8 in) across 29 days. Humidity levels remain high in both months, hovering around 92% in September and 93% in July. For a more detailed look at July weather patterns, check out Trashigang weather in July.
In comparing the weather of September to August, we observe that September experiences slightly cooler temperatures with a minimum of 13°C (55°F) and an average of 19°C (67°F), compared to August's minimum of 15°C (59°F) and average of 20°C (69°F). Both months see a maximum temperature of 27°C (81°F). However, September is notably wetter, with 503 mm (19.8 in) of precipitation over 29 days, while August records 678 mm (26.7 in) over 31 days. Humidity remains consistently high at 92% for both months, creating a persistently muggy atmosphere. For a deeper look into August's weather specifics, check Trashigang weather in August.
September and October present notable differences in weather conditions. September, with its milder temperatures, ranges from a minimum of 13°C (55°F) to a maximum of 27°C (80°F), while October sees cooler temperatures, dipping to a minimum of 6°C (42°F) and averaging around 16°C (62°F). Precipitation is significantly higher in September, with 503 mm (19.8 in) falling over 29 days, compared to October's 133 mm (5.2 in) across 16 days, making the latter much drier. Humidity also decreases slightly, from September’s 92% to October’s 89%. For more detail on weather patterns in October, you can check this link: Trashigang weather in October.
September experiences a warmer climate with average temperatures ranging from a minimum of 13°C (55°F) to a maximum of 27°C (80°F), along with significant rainfall of 503 mm (19.8 in) spread over 29 days. The humidity is quite high at 92%, making the atmosphere feel damp and muggy. In contrast, November brings much cooler temperatures, with lows of 4°C (39°F) and highs of 23°C (74°F), and a substantial decrease in precipitation to only 25 mm (1.0 in) over just 6 days. The humidity also drops to 86%, contributing to a more comfortable feel compared to September. For more detailed insights, you can explore Trashigang weather in November.
The weather in September is significantly warmer and wetter compared to December. In September, temperatures range from a minimum of 13°C (55°F) to a maximum of 27°C (80°F), accompanied by high humidity levels reaching 92%. This month experiences substantial rainfall, with a total of 503 mm (19.8 in) spread over 29 days. In contrast, December sees much cooler temperatures, with a minimum of 0°C (31°F) and an average of 9°C (49°F), peaking at 19°C (66°F). Precipitation drops drastically to just 28 mm (1.1 in) over 8 days, and humidity decreases slightly to 83%. For more details on the weather in December, you can visit Trashigang weather in December.
As September unfolds in Trashigang, the weather shifts into a more humid and rainy phase compared to other months. The high humidity levels and frequent precipitation create a lush and vibrant landscape, making the region particularly picturesque. This month sees the temperatures begin to transition from the warmth of summer, with averages settling around 19°C, while nights can dip to a cool 13°C. With nearly the entire month experiencing rain, the lushness of the surrounding nature is amplified, offering a refreshing respite from the drier months. The unique climate patterns of September make it an ideal time for nature enthusiasts to explore and appreciate the breathtaking scenery. For a more comprehensive understanding of what to expect throughout the year, check out Trashigang Climate.