Last updated: August 31, 2025
In Namche Bazar, Nepal, September brings a refreshing chill, with temperatures peaking at a maximum of 13°C (55°F) and dipping to a minimum of -1°C (31°F), while the average hovers around 6°C (44°F). This month witnesses substantial precipitation, accumulating 210 mm (8.3 in) over approximately 25 days, contributing to an often moist atmosphere with humidity levels soaring to 92%. Visitors can expect a landscape enveloped in mist, offering a unique blend of serenity and vibrancy as nature prepares for the onset of autumn in the Himalayas.
In September, Namche Bazar experiences a subtle transition as temperatures begin to cool from the warmth of summer. The average temperature hovers around 6°C (44°F), with nighttime lows dipping to about -1°C (31°F), offering a crisp yet invigorating atmosphere. This shift marks a notable change from the preceding months, where temperatures remained consistently milder; however, the maximum temperature reaches a comfortable 13°C (55°F), providing pleasant days for trekkers and adventurers. As autumn approaches, visitors will notice decreasing temperatures as the month progresses, hinting at the colder months ahead, while still enjoying the beauty of the Himalayas in a breathtaking fall setting.
In September, Namche Bazar experiences a significant shift as monsoon rains begin to taper off, yet the region still copes with considerable precipitation, collecting 210 mm (8.3 in) over 25 days. This marks a decline from the intensive downpours of July and August, when the area was inundated with 514 mm (20.3 in) and 423 mm (16.6 in) respectively. Notably, September retains a heavy rainfall pattern compared to other months, highlighting the lingering impact of the monsoon season. As autumn approaches, residents of Namche Bazar prepare for a transition, as the precipitation decreases markedly in October to 47 mm (1.9 in), indicating the end of the wet season and paving the way for clearer skies and cooler temperatures.
In Namche Bazar, Nepal, September marks a peak in the region's humidity levels, echoing the trend set by the preceding summer months. With humidity soaring to a notable 92%, the air feels thick and lush, a stark contrast to the crispness experienced at the beginning of the year. The seasonality of humidity in Namche Bazar reveals a steep decline from 58% in January to a low of 25% in April, before rising significantly during the monsoon months of June and July, where it reaches its zenith. As the wet season transitions into autumn, September retains this high humidity, creating a vibrant, oxygen-rich atmosphere, often embraced by the lush greenery surrounding the town. Following September, a gradual decrease begins, hinting at the approaching winter months, where the humidity will settle down to 87% in October. Thus, September serves as a climactic point in the annual humidity cycle, embodying the intersection of summer's lingering warmth and the onset of fall’s cool embrace.
In September, Namche Bazar continues to experience an extreme UV Index of 14, indicating that outdoor enthusiasts should remain vigilant about sun protection, with a burn time of just 10 minutes. This month mirrors the preceding summer months, where the UV Index peaked at 16 for several consecutive months from June to August. As autumn approaches, there is a notable decrease from the summer highs, yet the intensity remains significant. Overall, the trend throughout the year highlights a sustained UV challenge: while the UV Index reaches its zenith during the height of summer, it remains remarkably high into early fall, emphasizing the importance of continual sun safety. For more detailed information, visit Namche Bazar UV Index.
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As the vibrant summer fades into early autumn, September in Namche Bazar, Nepal offers a delightful 270 hours of sunshine, making it a brilliant month for trekkers and adventurers alike. Following the intense brightness of May, which boasts the year's highest sunlight at 359 hours, September shows a slight dip, yet remains significantly sunnier than the preceding monsoon months of July and August. This transitional period is marked by a gradual return of clear skies, allowing the stunning Himalayan landscapes to bask in the warm, golden light. As days grow shorter towards October's 325 hours, September serves as a perfect backdrop to embrace the beauty of the changing seasons, inviting visitors to explore the majestic mountains under the welcoming sunshine.
In Namche Bazar, Nepal, the likelihood of sunny weather in September is notably low, with only a 16% chance of clear skies. This month marks a significant drop from the vibrant sunny days of previous months, as the region transitions from summer's peak into the onset of autumn. The sun’s presence diminishes sharply during the monsoon season, with July and August exhibiting a mere 4% and 3% chance, respectively. Despite the uptick in sunshine expected in October at 56%, September remains a time when clouds dominate, hinting at the shift towards the drier, sunnier months of late autumn and early winter. Travelers seeking sunny days might want to plan their visits outside of this transitional period.
In Namche Bazar, Nepal, the rhythm of daylight begins to shift as the seasons change. September marks a gentle transition from the long, sunlit days of summer, where residents enjoyed up to 13 hours of daylight from May through August, to a more moderate 12 hours of daylight. This reduction signals the approach of autumn, with daylight gradually tapering off as the year progresses. Following September, October and November will deliver even shorter days, emphasizing the cyclical nature of time in this beautiful Himalayan region. Overall, the daylight duration reflects a natural ebb and flow, enriching the experience of both locals and travelers in this captivating locale.
In September, the winds of Namche Bazar, Nepal, commence a subtle resurgence, with an average speed of 0.9 m/s (2 mph). This marks a slight uptick from the sleepy breezes of the preceding summer months, where wind speeds dwindled to their annual lows of 0.8 m/s in August. The transition into autumn heralds a refreshing change in the air, as conditions begin to shift once more. While the wind remains gentle compared to the more robust gusts of winter—like the 1.6 m/s in January or 1.4 m/s in November—September's breezes hint at the promise of invigorating months ahead, reflecting the natural rhythm of this enchanting Himalayan town.
Weather in Namche Bazar varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Namche Bazar, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly different weather conditions. In September, temperatures range from a minimum of -1°C (31°F) to a maximum of 13°C (55°F), with an average temperature of 6°C (44°F). This month is characterized by high humidity at 92%, frequent rain, and a total precipitation of 210 mm (8.3 in) over 25 days. In contrast, January sees much colder temperatures, with lows reaching -26°C (-15°F) and an average of -10°C (13°F), peaking at 7°C (45°F). The winter month is notably drier, receiving only 25 mm (1.0 in) of precipitation over just 2 days, and the humidity drops to 58%. For more specific insights on weather conditions during January, you can visit Namche Bazar weather in January.
September and February exhibit striking differences in weather conditions. September has a milder temperature range, with averages peaking at 6°C (44°F) and maximums reaching 13°C (55°F), while February experiences much colder temperatures, with an average of -9°C (16°F) and lows plunging to -24°C (-12°F). Precipitation patterns also diverge significantly; September sees frequent rain over 25 days, totaling 210 mm (8.3 in), whereas February is dry, averaging only 25 mm (1.0 in) over just 5 days. Additionally, the humidity is much higher in September at 92%, compared to February’s 53%. For more details on February weather, you can visit Namche Bazar weather in February.
In September, the weather is notably milder, with temperatures ranging from a chilly -1°C (31°F) to a pleasant maximum of 13°C (55°F). This month experiences significant rainfall, averaging 210 mm (8.3 in) and spanning 25 days, coupled with high humidity at 92%. In contrast, March is much colder, featuring temperatures that drop to a minimum of -25°C (-12°F) and peak at 8°C (47°F), with an average of -5°C (23°F). Precipitation in March is considerably lower, with only 29 mm (1.2 in) falling over 7 days, and a much drier atmosphere reflected in the humidity of 32%. For a more detailed look at the conditions during this month, check out Namche Bazar weather in March.
The weather in September is noticeably milder compared to April, featuring temperatures that range from a minimum of -1°C (31°F) to a comfortable maximum of 13°C (55°F) and an average of 6°C (44°F). In contrast, April experiences colder temperatures, with a minimum of -12°C (12°F) and an average of -1°C (31°F), peaking at just 10°C (50°F). While September receives a significant amount of precipitation at 210 mm (8.3 in) over 25 days, April is much drier, with only 67 mm (2.6 in) over 20 days. Additionally, September's humidity sits at a high 92%, whereas April features a much lower humidity level of 25%. For more detailed information about the weather in April, you can check Namche Bazar weather in April.
When comparing the weather in September and May, September tends to be slightly warmer, with average temperatures around 6°C (44°F) and a maximum of 13°C (55°F), compared to May's average of 3°C (37°F) and a maximum of 11°C (53°F). However, September experiences significantly more precipitation, totaling 210 mm (8.3 in) over 25 days, while May sees only 120 mm (4.7 in) across 24 days. This difference contributes to a much higher humidity level in September at 92%, compared to May’s 46%. For a closer look at May's conditions, you can check Namche Bazar weather in May.
When comparing the weather in September to that of June, both months exhibit similar maximum temperatures, reaching up to 13°C (55°F). However, September tends to be slightly warmer on average at 6°C (44°F) compared to June’s 7°C (44°F) average. In terms of precipitation, September has a higher total of 210 mm (8.3 in) over 25 days, while June experiences 197 mm (7.8 in) during the same number of days. Additionally, September is notably more humid, with humidity levels at 92% versus June's 77%. For more specific details related to June weather, you can refer to Namche Bazar weather in June.
In comparing the weather between September and July, both months exhibit cool temperatures with July experiencing slightly higher averages. September has a minimum temperature of -1°C (31°F) and an average of 6°C (44°F), while July's minimum is higher at 2°C (36°F) with an average of 8°C (46°F). Both months see maximum temperatures around 13°C (55°F for September and 56°F for July). However, July is significantly wetter, with 514 mm (20.3 in) of precipitation over 31 days compared to September's 210 mm (8.3 in) across 25 days. Humidity remains constant at 92% for both months, underscoring the damp conditions typical of the area. For a detailed look at July's weather, visit Namche Bazar weather in July.
In comparing the weather between September and August, September experiences slightly cooler temperatures, with a minimum of -1°C (31°F) and an average of 6°C (44°F), compared to August's minimum of 3°C (37°F) and average of 8°C (46°F). While both months have high humidity levels of 92%, September sees increased precipitation, totaling 210 mm (8.3 in) over 25 days, in contrast to August's 423 mm (16.6 in) across 30 days. This suggests that while both months are wet, August is significantly rainier. For more detailed information about the weather in August, you can refer to Namche Bazar weather in August.
September weather tends to be milder, featuring an average temperature of 6°C (44°F), while October sees a drop to an average of 2°C (37°F). The maximum temperatures also decline from 13°C (55°F) in September to 10°C (50°F) in October. Additionally, September is much wetter, with 210 mm (8.3 in) of precipitation over 25 days, compared to only 47 mm (1.9 in) over just 7 days in October. Humidity levels remain high in both months, but slightly decrease from 92% in September to 87% in October. For more details, check out the Namche Bazar weather in October.
In September, the weather is relatively mild with temperatures ranging from a minimum of -1°C (31°F) to a maximum of 13°C (55°F) and an average of 6°C (44°F). The month is characterized by high humidity at 92% and significant precipitation, totaling 210 mm (8.3 in) over 25 days. In contrast, November experiences much colder temperatures, with a minimum of -12°C (10°F), an average of -3°C (27°F), and a maximum of 8°C (47°F). The precipitation drastically drops to just 4 mm (0.2 in) over a single day, and humidity decreases to 76%. For more insights on the climate during this month, you can check out Namche Bazar weather in November.
September and December present stark contrasts in weather conditions. In September, temperatures range from a minimum of -1°C (31°F) to a maximum of 13°C (55°F), with an average of 6°C (44°F), accompanied by high humidity at 92% and significant precipitation totaling 210 mm (8.3 in) over 25 days. In contrast, December sees much colder temperatures, with a minimum of -23°C (-10°F) and an average of -7°C (20°F), peaking at 7°C (45°F). Precipitation is minimal during December, measuring only 17 mm (0.7 in) over just 2 days, and humidity drops to 71%. For more specific details about conditions in December, check out this link: Namche Bazar weather in December.
As September unfolds in Namche Bazar, it brings a transition marked by cooler temperatures and increased rainfall compared to the summer months. With the mercury hovering around 6°C on average and dipping as low as -1°C, visitors can expect a brisk atmosphere. Precipitation is significant, with nearly 25 days of rain contributing to the lush landscape, making it a stark contrast to the dry seasons that precede it. The high humidity adds to the chill, creating a damp environment that potential trekkers should prepare for. Overall, September serves as a bridge between the warmer summer and the chillier autumn days. For more detailed insights on weather patterns, visit Namche Bazar Climate.