Last updated: August 31, 2025
In September, Birganj, Nepal, experiences a warm and humid climate characterized by a maximum temperature reaching 37°C (99°F) and an average temperature of 29°C (84°F). With a minimum temperature of 22°C (73°F), the month offers a mix of warm days and cooler nights. However, it’s also a notably wet month, accumulating 262 mm (10.3 inches) of rain over approximately 24 days, contributing to a humidity level of 91%. This interplay of warmth and moisture creates a lush environment, making September a vibrant yet challenging time for outdoor activities in Birganj.
In Birganj, Nepal, September marks a subtle transition in temperatures as the monsoon season begins to wane. With minimum temperatures around 22°C (73°F) and averages settling at 29°C (84°F), there’s a noticeable warmth in the air without the oppressive heat of peak summer. The maximum temperatures typically reach up to 37°C (99°F), providing a comfortable ambiance for outdoor activities. This month showcases a slight dip from the sweltering highs of August, heralding a more pleasant time to explore the region as the humidity eases and the landscape becomes lush and vibrant post-monsoon. Overall, September in Birganj presents an inviting balance of warmth and comfort, ideal for immersing oneself in the local culture.
In September, Birganj, Nepal, experiences a significant shift in precipitation, receiving 262 mm (10.3 in) of rain over 24 days. This marks a notable decrease from the torrential rains of July and August, yet it still contributes to the tail end of the monsoon season. The rainfall is substantial enough to sustain the lush landscapes, but it indicates a gradual transition towards drier months ahead. Comparing this with the 213 mm (8.4 in) in June and 513 mm (20.2 in) in July, September's precipitation demonstrates a trend of decreasing rainfall as the monsoon recedes, paving the way to the drier October, where only 55 mm (2.2 in) is expected. This pattern highlights the cyclical nature of Birganj's climate, as the region shifts from peak monsoon intensity to a more moderate wetness.
In September, Birganj, Nepal, experiences one of its peak humidity levels, reaching a notable 91%. This high humidity follows the intense moisture of July and August, where the atmosphere is saturated with the monsoon's influence. After a gradual decline from the dry winter months, where humidity dipped as low as 24% in April, September marks a return to significant moisture before the gradual decrease into the more temperate weather of October. As the year progresses, it’s evident that Birganj’s climate transitions from dry spells to a humid atmosphere, showcasing the region's distinct seasonal shifts. This trend highlights the impact of the monsoon season, making September not only a continuation of high humidity but also a reminder of the dynamic weather patterns in this part of Nepal.
As September rolls in Birganj, Nepal, the UV Index continues its trend of extreme levels, measuring 11 this month with a corresponding burn time of just 10 minutes. This marks a slight decrease from the intense peak seen in July and August, where the index reached 13. However, the consistent presence of high UV levels throughout the summer months highlights the importance of sun safety practices. The intensity remains elevated compared to earlier months, like January, when the index was only 5. As autumn approaches, residents and visitors alike are reminded to stay vigilant against UV exposure and take appropriate precautions. For more details on maintaining sun safety, check out the comprehensive guide on the Birganj UV Index.
UV Risk Categories
As September unfolds in Birganj, Nepal, the sun continues to shine brightly, bathing the city in 277 hours of sunshine this month. Following the warm embrace of summer, which peaked in May with a dazzling 350 hours, September experiences a gradual decrease in sunlight. However, it still holds its own compared to the earlier months of the year. The transition into autumn is marked by a steady rhythm of daylight, seen as a mild drop from August's 269 hours. This month, with its blend of warmth and vibrant daylight, invites residents and visitors alike to embrace the lingering beauty of an extended summer before the cooler months set in. Notably, September maintains a consistent position among the sunniest months, reinforcing its place in the heart of Birganj's seasonal charm.
As September approaches in Birganj, Nepal, the likelihood of sunny weather takes a noticeable dip, with only a 27% chance of sunshine. This marks a stark contrast to the earlier months of the year, where sunshine reigns supreme, especially in February and March, boasting impressive probabilities of 88% and 86% respectively. The transition into monsoonal months is evident, as the summer heat peters off and gives way to the cloudy greys of autumn. While September does present occasional sunny days, it stands as a clear precursor to the wetter conditions that follow in October, which rebounds to a more promising 66% chance of sun. Thus, for those planning to visit Birganj, remaining mindful of the changing weather patterns is essential as the vibrant summer days slowly recede.
As September ushers in the transition from summer to autumn in Birganj, Nepal, daylight begins to wane slightly, offering around 12 hours of sunlight each day. This marks a subtle decline from the peak summer months of June through August, when the region enjoys 13 hours of bright daylight. While September still promises a generous amount of sunshine, it signals a gradual shift towards shorter days, reflecting the natural ebb and flow of light throughout the year. Following this month, daylight continues to diminish, with October seeing just 11 hours, as Birganj prepares for the cooler, darker months ahead. The rhythm of daylight here beautifully captures the cyclical nature of the seasons, inviting both reflection and anticipation for what lies ahead.
September in Birganj, Nepal, ushers in a refreshing shift in the breeze, with an average wind speed of 2.3 m/s (5 mph). This gentle wind marks a transition from the warmer summer months, where July and August recorded lower gusts of 2.4 m/s and 2.0 m/s respectively. As the monsoon season wanes, September showcases a slight uptick in wind speed, hinting at the upcoming autumnal change. Notably, this month's winds flow significantly more robustly than the winter months ahead, particularly in contrast to January's mere 1.6 m/s. Overall, September serves as a delightful interlude, offering a balance of warmth and refreshing air that is often cherished by locals and visitors alike.
Weather in Birganj varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Birganj, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January exhibit stark contrasts in weather conditions. In September, temperatures range from a minimum of 22°C (73°F) to a scorching maximum of 37°C (99°F), with an average of 29°C (84°F). This month is characterized by high humidity at 91% and significant rainfall, totalling 262 mm (10.3 in) over 24 days. In contrast, January experiences much cooler temperatures, with a minimum of 5°C (40°F) and an average of 15°C (60°F), peaking at 29°C (85°F). Precipitation is minimal in January, accumulating just 12 mm (0.5 in) in about one day, while humidity drops to 65%. For more details, you can check the Birganj weather in January.
When comparing the weather in September and February, the differences are striking. September boasts significantly higher temperatures, with an average of 29°C (84°F) and a maximum of 37°C (99°F), as opposed to February's milder average of 19°C (66°F) and maximum of 32°C (90°F). Additionally, September experiences much more precipitation, with 262 mm (10.3 in) over 24 days, leading to a humidity level of 91%. In contrast, February is much drier, with only 20 mm (0.8 in) of rain over just 2 days and a more comfortable humidity of 55%. For more detailed information on February's weather, you can visit Birganj weather in February.
September and March present contrasting weather conditions, showcasing the transition from the wet season to the dry season in the region. In September, temperatures range from a minimum of 22°C (73°F) to a maximum of 37°C (99°F), with an average of 29°C (84°F). This month also experiences significant rainfall, averaging 262 mm (10.3 in) over 24 days, leading to a high humidity level of 91%. In contrast, March features a much cooler environment with temperatures dipping to a minimum of 9°C (48°F) and peaking at 38°C (101°F), averaging around 24°C (76°F). Precipitation is minimal, only 13 mm (0.5 in) over just 2 days, resulting in a much lower humidity of 39%. For more insights, you can refer to Birganj weather in March.
September and April showcase distinct weather patterns. In September, the temperatures range from a minimum of 22°C (73°F) to a maximum of 37°C (99°F), with an average of 29°C (84°F). This month experiences significant rainfall, totaling 262 mm (10.3 in) over 24 days, resulting in high humidity levels at 91%. In contrast, April boasts warmer conditions with a minimum temperature of 17°C (62°F) and a maximum of 42°C (107°F), while maintaining a similar average of 29°C (85°F). However, April is notably drier, receiving only 36 mm (1.4 in) of precipitation over just 6 days, and it features much lower humidity at 24%. For a closer look at April's weather specifics, check Birganj weather in April.
When comparing the weather in September and May, notable differences arise in temperature, precipitation, and humidity. In September, temperatures range from a minimum of 22°C (73°F) to a maximum of 37°C (99°F), with an average of 29°C (84°F). This month is characterized by high humidity at 91% and considerable rainfall, totaling 262 mm (10.3 in) across 24 days. In contrast, May experiences slightly lower minimum temperatures of 20°C (69°F) but can reach scorching highs of 41°C (107°F), with an average temperature of 30°C (86°F). May is significantly drier than September, receiving only 152 mm (6.0 in) of precipitation over 14 days and enjoying much lower humidity at 36%. For more detailed insights into May weather, check out Birganj weather in May.
In comparing the weather between September and June, we can see some notable differences. September experiences a minimum temperature of 22°C (73°F) and an average temperature of 29°C (84°F), while June is slightly warmer with a minimum of 23°C (74°F) and an average of 31°C (87°F). June also peaks at a maximum temperature of 43°C (110°F), significantly higher than September's maximum of 37°C (99°F). Precipitation is more intense in September, with 262 mm (10.3 in) over 24 days, compared to June's 213 mm (8.4 in) over 21 days. Additionally, September's humidity of 91% creates a more muggy atmosphere than June's 65% humidity. For more details, you can check Birganj weather in June.
In comparing the weather between September and July, both months exhibit high temperatures with September featuring a minimum of 22°C (73°F), an average of 29°C (84°F), and a maximum of 37°C (99°F). July, on the other hand, showcases slightly higher minimum and maximum temperatures, ranging from 24°C (76°F) to a peak of 40°C (103°F), while maintaining the same average at 29°C (85°F). Precipitation plays a significant role in distinguishing the two months; September receives 262 mm (10.3 in) over 24 days, while July sees significantly heavier rainfall at 513 mm (20.2 in) across 29 days. The humidity levels are similar, with September at 91% and July slightly lower at 90%. For a closer look at July's weather specifics, you can check Birganj weather in July.
In comparing the weather of September and August, both months experience high temperatures and significant humidity, but there are some notable differences. September has a slightly lower minimum temperature of 22°C (73°F) compared to August’s minimum of 25°C (77°F), while the average temperature remains similar at around 29°C (84°F for September and 85°F for August). However, August records a higher maximum temperature of 38°C (101°F) compared to September's peak of 37°C (99°F). Precipitation is also more pronounced in August, with 351 mm (13.8 in) over 29 days, versus 262 mm (10.3 in) over 24 days in September. This indicates that August is not only hotter but also wetter. For a detailed look at August's weather, you can visit Birganj weather in August.
September's weather is characterized by higher temperatures and significant rainfall, with average temperatures around 29°C (84°F) and a staggering 262 mm (10.3 in) of precipitation over 24 days, resulting in a humidity level of 91%. In contrast, October brings a noticeable drop in minimum temperatures to 16°C (60°F) and a smaller average of 27°C (80°F), alongside a significant reduction in rainfall to just 55 mm (2.2 in) over only 7 days, leading to a slight decrease in humidity to 86%. For more detailed insights, you can check Birganj weather in October.
September and November present stark contrasts in weather conditions. In September, temperatures range significantly from a minimum of 22°C (73°F) to a scorching maximum of 37°C (99°F), with an average temperature of 29°C (84°F). This month is characterized by high humidity at 91% and frequent rain, with 262 mm (10.3 in) of precipitation over 24 days. In contrast, November experiences much cooler temperatures, with a minimum of 11°C (52°F) and a maximum of 35°C (95°F), resulting in an average of 21°C (71°F). Notably, November is much drier, receiving only 1 mm (0.0 in) of precipitation across 0 days and exhibiting lower humidity at 79%. For more detailed information on November weather, you can visit Birganj weather in November.
September and December present starkly contrasting weather patterns. In September, temperatures range from a minimum of 22°C (73°F) to a scorching maximum of 37°C (99°F), with an average of 29°C (84°F). This month is also characterized by high humidity at 91% and significant rainfall, totaling 262 mm (10.3 in) over 24 days. In contrast, December experiences much cooler conditions, with temperatures dipping to a minimum of 6°C (42°F) and reaching a maximum of 30°C (85°F), averaging 17°C (62°F). Rainfall is minimal during December, amounting to just 11 mm (0.4 in), and it typically sees no rainy days, accompanied by lower humidity at 75%. For more information on Birganj weather, visit Birganj weather in December.
As September draws to a close, Birganj experiences a unique blend of heat and humidity that sets it apart from other months. With average temperatures hovering around a balmy 29°C, the days can be uncomfortably warm, often peaking at 37°C, while nights offer slight relief at a minimum of 22°C. However, it is the intense rainfall, totaling 262 mm over 24 days, that marks this month as particularly distinctive, adding a touch of freshness to the lingering heat. This high level of humidity, at a staggering 91%, creates a muggy atmosphere unlike any other time of the year. To understand more about how these conditions shape the local climate, explore Birganj Climate.