Last updated: August 31, 2025
In September, Nepalgunj experiences a vibrant yet humid climate, with temperatures ranging from a maximum of 36°C (98°F) to an average of 29°C (85°F) and a minimum of 23°C (75°F). This month marks a significant shift, as the region receives substantial rainfall, with total precipitation reaching 207 mm (8.2 in) over approximately 20 days. The high humidity level, averaging around 90%, adds to the lush landscape, making September a transitional month that prepares the area for the refreshing cooler days ahead. Whether you're exploring the lush surroundings or experiencing local culture, expect a mix of warmth and refreshing downpours.
In September, temperatures in Nepalgunj continue to reflect the lingering warmth of summer, with minimums around 23°C (75°F) and averages holding steady at 29°C (85°F). The daily highs reach up to 36°C (98°F), maintaining the balmy atmosphere typical of preceding months. This slight cooling trend indicates a gradual transition towards autumn, while still providing ample warmth for outdoor activities. As the month progresses, the region's climatic shift becomes more pronounced, paving the way for the refreshing changes that October promises. Overall, September in Nepalgunj strikes a harmonious balance between the tail end of summer's heat and the forthcoming coolness of fall.
In September, Nepalgunj experiences significant precipitation, with 207 mm (8.2 in) of rain recorded over 20 days. This marks a notable decrease from the intense deluge of July and August, yet it still contributes to a relatively wet month as the monsoon season begins to taper off. The rain is essential for local agriculture, providing needed moisture to crops after the peak rainy season. Comparing September to earlier months, it reflects a transitional phase, where the monsoonal rains, though reduced, continue to support the verdant landscape before the drier months take hold as October approaches.
September in Nepalgunj, Nepal, marks the tail end of the monsoon season, where humidity levels remain exceptionally high at 90%. Following a consistent increase throughout the summer months—peaking at 91% in August—the moisture-laden air clings to the atmosphere as the region transitions into autumn. This prevailing humidity reflects a marked contrast to the drier pre-monsoon conditions seen earlier in the year, particularly in April and May, where levels dipped to around 36-37%. As the days begin to shorten and the rains lessen, humidity does gradually decline moving into October, yet September's stickiness serves as a reminder of the lingering warmth and moisture before the cooler months set in.
In September, Nepalgunj experiences a high UV Index of 11, placing it in the extreme exposure category with a burn time of just 10 minutes. This trend of elevated UV levels continues from the preceding months of July and August, which also saw an index of 11 and 12, respectively. As the summer wanes, it’s crucial for residents and visitors alike to remain vigilant about sun protection. The UV Index is notably higher during the mid-year months, peaking in June and July, which can be attributed to the region's geographical position and climatic conditions. As we transition into October, the UV Index is expected to drop to 9, indicating a return to a very high exposure category. For more detailed information on UV levels and safety measures, visit Nepalgunj UV Index.
UV Risk Categories
In Nepalgunj, Nepal, September heralds a delightful transition into autumn, enjoying an impressive 310 hours of sunshine. This month stands out amidst a year marked by a gradual increase in sunlight, peaking in May with 365 hours. As the monsoon recedes, September showcases a refreshingly bright atmosphere, falling comfortably between the lush months of summer and the cooler days to follow. The trend of sunshine reveals a pattern of abundance during spring and summer, while later months, like November and December, see a decrease, creating a picturesque backdrop that invites exploration and adventure before the chill sets in.
As September arrives in Nepalgunj, the likelihood of sunny weather fluctuates, with a 36% chance of sunshine. This marks a notable dip compared to the preceding months, especially the sun-drenched days of February through May, which boast probabilities around or above 80%. Following the heavy monsoon months of June and July, where sunshine plummets to a mere 14%, September's weather brings the promise of clearer skies, albeit with less certainty. As autumn approaches, the sun's return becomes more likely in October, suggesting that those longing for warmth and light may need to enjoy the brief, intermittent bursts of sunshine September offers before the more favorable months unfold.
As September unfolds in Nepalgunj, daylight begins to wane gently, offering around 12 hours of sunlight. This month marks a subtle transition, following summer’s extended luminosity with up to 13 hours of daylight in the preceding months of May through August. After this peak, daylight duration starts to slip back, aligning with the approaching autumn, as the days gradually shorten leading into October. This rhythm of nature highlights the region's seasonal shifts, creating a picturesque tapestry of light that influences daily life and embodies the essence of change in Nepalgunj.
As September arrives in Nepalgunj, the average wind speed gently settles at 2.1 m/s (5 mph), reflecting the region’s mild air currents as it transitions into autumn. Following a summer marked by breezy conditions, with July peaking at the same average speed, September's winds suggest a slight moderation compared to the preceding months. This consistent breeze in September not only enhances the region's charm but also sets the stage for the tranquil, cooler months ahead. Observing the overall trend, it's apparent that the wind speeds oscillate gently through the year, peaking slightly in the middle months and tapering off into a calmer winter. In this lovely part of Nepal, the winds whisper stories of changing seasons while inviting both locals and visitors to relish the serene beauty of nature.
Weather in Nepalgunj varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Nepalgunj, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather in Nepalgunj is characterized by hot temperatures, with a minimum of 23°C (75°F) and an average of 29°C (85°F), peaking at a scorching 36°C (98°F). This month also sees significant rainfall, accumulating 207 mm (8.2 in) over 20 days, contributing to high humidity levels of around 90%. In contrast, January experiences much cooler weather, with temperatures ranging from a minimum of 5°C (41°F) to an average of 14°C (57°F) and a maximum of 27°C (82°F). January is notably drier, with only 24 mm (0.9 in) of precipitation over just 3 days, and a lower humidity of 74%. For more details, you can check Nepalgunj weather in January.
Comparing the weather in September and February reveals significant contrasts. In September, temperatures are quite high, with averages around 29°C (85°F) and maximums reaching up to 36°C (98°F), coupled with high humidity at 90%. This month also experiences considerable rainfall, averaging 207 mm over about 20 days, contributing to a humid and wet atmosphere.
In stark juxtaposition, February offers a much cooler climate with minimum temperatures dipping to 6°C (44°F) and an average of 18°C (64°F). The maximum temperature can reach 32°C (90°F), but the overall vibe is drier, with only 20 mm of rainfall over just three days and humidity at a more comfortable 63%. For a detailed look at the specifics of February weather in Nepalgunj, check out Nepalgunj weather in February.
September and March exhibit distinct weather patterns, reflecting the transition between monsoon and spring. In September, temperatures range from a minimum of 23°C (75°F) to a maximum of 36°C (98°F), with an average of 29°C (85°F). This month is marked by high humidity levels at 90% and significant rainfall, totaling 207 mm (8.2 in) over 20 days. In contrast, March brings much cooler temperatures, with a minimum of 10°C (50°F) and a maximum of 37°C (99°F), averaging at 23°C (74°F). Precipitation is minimal in March, amounting to just 15 mm (0.6 in) over 3 days, accompanied by a more comfortable humidity level of 53%. For a detailed look at March weather conditions, check out Nepalgunj weather in March.
When comparing the weather in September and April, notable differences emerge. September is characterized by warmer temperatures, with daily highs averaging around 29°C (85°F) but reaching up to 36°C (98°F). It also has a high level of humidity at 90% and significant rainfall, with precipitation occurring on 20 days, totaling 207 mm (8.2 in). In contrast, April features a cooler minimum temperature of 14°C (58°F), while still maintaining an average of 29°C (84°F) and peaking at an impressive 41°C (106°F). Notably, April experiences minimal rainfall, with only 23 mm (0.9 in) over just 3 days, and a much lower humidity level of 36%. For more details, you can check out Nepalgunj weather in April.
When comparing the weather in September and May, notable differences emerge. September experiences a warmer range of temperatures, with minimums around 23°C (75°F) and maximums reaching 36°C (98°F), coupled with high humidity levels at 90%. It also sees significant rainfall, averaging 207 mm (8.2 in) over 20 days, making it a much wetter month. In contrast, May presents slightly cooler minimum temperatures of 19°C (67°F) and much higher maximums peaking at 42°C (107°F). This month is much drier, receiving only 56 mm (2.2 in) of precipitation over about 5 days and a notably lower humidity of 37%. For more detailed information, you can check Nepalgunj weather in May.
When comparing the weather in September to that of June, a few notable differences emerge. September features temperatures ranging from a minimum of 23°C (75°F) to a maximum of 36°C (98°F), with an average of 29°C (85°F). This month also experiences significantly higher precipitation, totaling 207 mm (8.2 in) over about 20 days, and a high humidity level of 90%. In contrast, June typically sees a broader temperature range, with a minimum of 23°C (74°F) and a maximum soaring up to 43°C (109°F), averaging at 31°C (88°F). The rainfall in June is lower, with 171 mm (6.7 in) over 14 days and a much drier humidity level of 56%. For more specifics on June weather, you can refer to Nepalgunj weather in June.
When comparing the weather in September and July, we observe a few notable differences. September typically experiences slightly cooler temperatures, with a minimum of 23°C (75°F) and an average of 29°C (85°F), compared to July's minimum of 24°C (76°F) and average of 30°C (86°F). However, July tends to be the wetter month, receiving 356 mm (14.0 in) of precipitation over 25 days, while September sees less rainfall at 207 mm (8.2 in) across 20 days. Humidity levels are also high in both months, with September at 90% and July at 87%. Overall, while both months are warm and humid, July is characterized by higher temperatures and significantly more rainfall. For more specific details on July weather, you can check Nepalgunj weather in July.
In comparing the weather between August and September, we see some notable differences. September brings slightly cooler minimum temperatures, averaging 23°C (75°F) compared to August's 25°C (77°F), while both months maintain an average temperature of 29°C (85°F) and a maximum around 36°C (98°F). Precipitation in September is lower at 207 mm (8.2 in) over 20 days, compared to August's 252 mm (9.9 in) over 26 days. Humidity levels are similar, with September at 90% and August slightly higher at 91%. For a more detailed understanding of the weather in August, you can refer to Nepalgunj weather in August.
September and October present a notable shift in weather patterns. In September, temperatures range from a minimum of 23°C (75°F) to a maximum of 36°C (98°F), with an average of 29°C (85°F), while the month experiences significant rainfall, totaling 207 mm (8.2 in) over 20 days. The humidity remains high at 90%, making it feel quite muggy. In contrast, October sees a decrease in both temperature and precipitation, with minimums dropping to 15°C (60°F) and averages around 26°C (79°F). Rainfall significantly diminishes to just 18 mm (0.7 in) across a mere 3 days, contributing to a more comfortable humidity level of 87%. For a closer look at the specifics, you can check out Nepalgunj weather in October.
In September, the weather is characterized by high temperatures, with a minimum of 23°C (75°F) and an average of 29°C (85°F), peaking at a sweltering 36°C (98°F). This month also sees considerable rainfall, with precipitation totaling 207 mm (8.2 in) over approximately 20 days, contributing to a high humidity level of 90%. In stark contrast, November experiences much cooler temperatures, dropping to a minimum of 10°C (50°F) and averaging around 20°C (69°F), with a maximum of 32°C (90°F). Additionally, November is notably dry, receiving only 3 mm (0.1 in) of precipitation with no rainy days and a slightly lower humidity of 85%. For a detailed look at the weather in November, you can visit Nepalgunj weather in November.
The weather in September is significantly warmer and more humid compared to December. In September, temperatures range from a minimum of 23°C (75°F) to a high of 36°C (98°F), with an average temperature of 29°C (85°F) and frequent rainfall totaling 207 mm (8.2 in) over 20 days. In contrast, December sees much cooler temperatures, with a minimum of 5°C (41°F) and a maximum of 28°C (83°F), averaging 15°C (60°F). Rainfall is minimal in December, with only 13 mm (0.5 in) over just one day, and humidity is slightly lower at 82%. For more detailed information on the weather in December, you can visit Nepalgunj weather in December.
September in Nepalgunj marks a transition to cooler days, characterized by a noticeable drop in temperature from the sweltering summer months. With an average temperature settling around 29°C, the days bring a welcome relief, although the humidity remains high at 90%, creating a tropical feel. This month is also quite wet, featuring about 20 days of rainfall, leading to a significant increase in precipitation compared to the drier months of June and July. Overall, September stands out as a month of contrast, balancing heat and humidity with refreshing monsoon showers. For a deeper dive into the nuances of weather patterns, explore Nepalgunj Climate.