September Weather in Jomsom, Nepal

Last updated: August 31, 2025

September in Jomsom, Nepal presents a captivating meteorological experience, characterized by a maximum temperature reaching a chilly 15°C (59°F), an average of 7°C (45°F), and a brisk minimum dipping to -8°C (19°F). This transitional month is marked by notable precipitation, totaling 223 mm (8.8 in) over approximately 26 days, creating a lush and vibrant landscape. With humidity levels hovering around 85%, the air is rich and thick, enhancing the atmospheric beauty of this stunning Himalayan region. Visitors can expect a blend of cool temperatures and frequent rains, making September a unique time to explore the breathtaking surroundings of Jomsom.

September Temperature in Jomsom

In September, Jomsom, Nepal begins to shift from summer's warmth to the chill of autumn, presenting a fascinating transition in temperatures. The month showcases a minimum of -8°C (19°F), a noticeable drop from the milder conditions of July and August, while the average hovers around 7°C (45°F). Daytime highs reach up to 15°C (59°F), offering a comfortable balance for outdoor activities. This gradual reduction in temperatures signals the onset of winter, contrasting sharply with the preceding months, making September an ideal time for those seeking a picturesque escape in the serene landscapes of this Himalayan region. The combination of crisp air and stunning vistas promises an invigorating experience for visitors.

September Weather in Jomsom: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Jomsom, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jomsom, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec121420283645484845362716
Data source: Temperature data for Jomsom generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Jomsom

September in Jomsom, Nepal, presents a significant shift in the monsoon season, with precipitation reaching 223 mm (8.8 in) over 26 days of rain. This marks a notable decline compared to the preceding months of July and August, which are characterized by their peak rainfall levels of 370 mm (14.6 in) and 333 mm (13.1 in), respectively. The transition into September signals a gradual easing of the relentless monsoon, as evidenced by the tapering precipitation amounts following the summer deluge. While still relatively wet, the drop in both total rainfall and number of rainy days hints at a gradual shift toward the drier months ahead, setting the stage for October’s average of just 49 mm (1.9 in).

September Precipitation Trends in Jomsom

The chart displays monthly precipitation patterns in Jomsom, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Jomsom, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec64616454113220370333223492748
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Jomsom

In September, Jomsom, Nepal, experiences a significant level of humidity at 85%, continuing the trend of high moisture typical for the late monsoon season. This marks a slight decrease from the peak of 90% in August, but still remains notably elevated when compared to the dryer months earlier in the year. As the summer months transition to autumn, humidity levels generally fluctuate, with July reaching a peak of 83% and gradually tapering off into October at 68%. This pattern highlights the region's characteristic monsoon influence, where late summer yields a humid atmosphere before the dryer fall kicks in.

September Average Humidity in Jomsom

This chart illustrates the average monthly humidity levels in Jomsom, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Jomsom is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec61%69%59%48%54%60%83%90%85%68%54%50%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Jomsom

As September unfolds in Jomsom, Nepal, the UV Index remains notably high at 15, categorizing the exposure as extreme. This trend follows a summer characterized by relentless sun exposure, with levels peaking at 17 in May and July. Interestingly, while September’s UV Index drops slightly from the summer maximums, it still demands caution, with a burn time of just 10 minutes. The pattern of extreme UV exposure continues into October, hinting at a long season of sun in this high-altitude region. For those planning outdoor activities, it’s wise to prioritize sun safety this month. For more detailed information, check the Jomsom UV Index.

Maximum UV Index Levels in Jomsom for September

The chart shows the monthly maximum UV Index (UVI) for Jomsom in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Jomsom typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911151517161716151497
Data source: Jomsom September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Jomsom

In September, Jomsom, Nepal, basks in the warmth of 294 hours of sunshine, marking a gentle shift as the monsoon fades and autumn approaches. This month showcases a notable decline from the sun-soaked days of May, which boasts the most sun hours at 365, yet it retains a significant brightness reminiscent of the earlier spring months. As the weather transitions, September reflects a consistent array of sunshine, only slightly less than its predecessor August. This trend of diminishing daylight paves the way to the sun-drenched autumn days of October, with Jomsom's captivating landscapes revealing their true vibrancy under the clear blue skies, inviting travelers to enjoy the stunning scenery as the season shifts.

Monthly Sunshine Duration in Jomsom: September Highlighted

The September sunshine duration represents the total number of hours Jomsom experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec252h296h348h357h365h310h251h253h294h332h309h305h
Data source: Jomsom September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Jomsom During September

In Jomsom, Nepal, the likelihood of sunny weather varies significantly throughout the year, with September experiencing a modest 16% chance of sunshine. This places it in a notably low range compared to the more sun-drenched winter months, where January boasts a sunny forecast of 77%. As the seasons shift towards summer, the chances of clear skies plummet dramatically, with the monsoon months of June, July, and August yielding a mere 11%, 4%, and 3% respectively. Following the summer, sunny days begin to dawn once more, as October sees a rise to 39%, indicating a gradual return to clearer weather. Although September may not be the sunniest month, it marks the beginning of a transition towards more consistent sunshine, offering a glimpse of the improving weather conditions ahead.

Percentage of Sunny Days in September in Jomsom

The chart illustrates the percentage of sunny days in Jomsom throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Jomsom experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec77%70%53%55%20%11%4%3%16%39%59%56%
Data source: Jomsom September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Jomsom in September

As the summer months wane, September in Jomsom, Nepal, ushers in a gentle decline in daylight duration, with 12 hours of sunlight gracing this picturesque region. After basking in the peak of sunlight during May to August, when daylight stretched to 13 hours, September marks a transition towards shorter days as the autumn season approaches. This gradual shift reflects a natural ebb, with daylight dipping again to 11 hours by October, reminiscent of the shorter, cozy days of January and November. As the year progresses, the rhythm of daylight captures the essence of changing seasons, inviting residents and travelers alike to savor the vibrant landscape under the warm embrace of the sun’s fading rays.

Average Daylight Hours in Jomsom for September

The chart illustrates the variation in daylight duration in Jomsom throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 31m11h 9m11h 59m12h 51m13h 34m13h 56m13h 45m13h 7m12h 18m11h 26m10h 42m10h 19m
Data source: Jomsom daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Jomsom

In Jomsom, Nepal, September marks the conclusion of a gentle wind cycle, with an average wind speed of 0.8 m/s (2 mph), mirroring the calmness of the preceding summer months. As the seasons transition, the breezes remain consistent, flowing through the region with only subtle variations throughout the year. Notably, from January through May, the winds gradually pick up slightly, reaching their peak in April before settling back into a soothing rhythm in late summer. The autumn months show a slight decrease, as the winds soften, foreshadowing the tranquility of the winter season ahead. This pattern highlights an overall stability in wind conditions, making September a particularly serene time for experiencing the enchanting landscapes of Jomsom.

Average September Wind Speed in Jomsom

The chart displays monthly wind speed patterns in Jomsom, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec0.70.80.80.90.80.90.90.90.8 m/s0.80.70.7
Data source: Jomsom September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Jomsom Compares to Other Months

Weather in Jomsom varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Jomsom, 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 brisk -8°C (19°F) at their lowest to a mild 15°C (59°F) at their highest, with an average of 7°C (45°F). The month is characterized by high humidity at 85% and substantial precipitation, receiving 223 mm (8.8 in) over 26 days. In contrast, January experiences much harsher conditions, with temperatures plummeting as low as -25°C (-13°F), averaging -11°C (12°F), and peaking at 10°C (49°F). Precipitation is significantly reduced in January, totaling 64 mm (2.5 in) over just 8 days, accompanied by a lower humidity level of 61%. For more details, you can check Jomsom weather in January.

September and February present stark contrasts in weather patterns. In September, temperatures range from a chilly minimum of -8°C (19°F) to a more comfortable maximum of 15°C (59°F), with an average temperature of 7°C (45°F). This month is characterized by high humidity at 85% and significant precipitation, totaling 223 mm (8.8 in) over 26 days. In contrast, February experiences much colder conditions, with minimum temperatures plummeting to -25°C (-12°F) and an average of -10°C (15°F). Though February sees less precipitation—only 61 mm (2.4 in) over 9 days—it features a lower humidity level of 69%, underscoring the dry, frigid air typical of winter. For more details on February weather, you can visit Jomsom weather in February.

When comparing the weather in September and March, we see notable differences, particularly in temperature and precipitation. In September, temperatures range from a minimum of -8°C (19°F) to a maximum of 15°C (59°F), with an average of 7°C (45°F). This month experiences significant rainfall, with 223 mm (8.8 in) of precipitation over 26 days, contributing to a high humidity of 85%. In contrast, March is much colder, with temperatures dipping as low as -20°C (-3°F) and averaging -7°C (20°F), with a maximum of only 9°C (48°F). Precipitation also decreases dramatically to 64 mm (2.5 in) over 12 days, resulting in a lower humidity of 59%. For more details on weather conditions in this month, visit Jomsom weather in March.

September and April present contrasting weather conditions, each with distinct characteristics. September enjoys milder temperatures, with minimums around -8°C (19°F) and highs reaching up to 15°C (59°F), while averaging a cool 7°C (45°F). However, it also experiences significant rainfall, totaling 223 mm (8.8 in) over 26 days, and has a high humidity level of 85%. In stark contrast, April is much colder, with lows dipping to -21°C (-5°F) and averages around -2°C (28°F). The maximum temperature only reaches 10°C (50°F), and precipitation is considerably lower at 54 mm (2.1 in) over 16 days, accompanied by a drop in humidity to 48%. For more specific details on April weather, check out Jomsom weather in April.

In comparing the weather conditions of September and May, September typically features milder temperatures with a range from a minimum of -8°C (19°F) to a maximum of 15°C (59°F), while May sees an even cooler minimum of -18°C (1°F) and a cap at 13°C (56°F). September is marked by significantly higher precipitation levels, averaging 223 mm (8.8 in) over 26 days, resulting in a humidity of 85%. In contrast, May experiences much less rainfall, totaling 113 mm (4.4 in) across 25 days, along with a lower humidity level of 54%. For those interested in specific details about weather patterns in Jomsom during this time, you can find more information here: Jomsom weather in May.

September and June share similar average temperatures, with both averaging around 7°C (45°F) and experiencing maximums of 15°C (59-60°F). However, September is notably cooler at night, with a minimum temperature dipping to -8°C (19°F) compared to -7°C (21°F) in June. Precipitation levels are quite comparable, with September receiving 223 mm (8.8 in) over 26 days and June slightly less at 220 mm (8.7 in) across 28 days. Humidity is higher in September at 85%, while June has a more moderate 60%. For those interested in specific details about June's weather patterns, you can explore Jomsom weather in June.

In September, the weather tends to be cooler with average temperatures ranging from a minimum of -8°C (19°F) to a maximum of 15°C (59°F), while July is relatively milder with temperatures ranging from 4°C (39°F) to 17°C (62°F). Precipitation levels in September are notable at 223 mm (8.8 in) over 26 days, which is less than July's substantial rainfall of 370 mm (14.6 in) spread across 31 days. Additionally, humidity remains quite high in both months, with September at 85% and July slightly lower at 83%. For more detailed information on the weather specifics for July, you can visit Jomsom weather in July.

In comparing the weather between August and September, September generally exhibits cooler temperatures, with a minimum of -8°C (19°F) and a maximum of 15°C (59°F), compared to August's milder range of 3°C (37°F) to 17°C (63°F). Additionally, September experiences slightly less precipitation, totaling 223 mm (8.8 in) over 26 days, while August sees more rainfall at 333 mm (13.1 in) over 30 days. Humidity remains high in both months, with September averaging 85% and August peaking at 90%. For more detailed information on August weather, you can visit Jomsom weather in August.

In September, the weather tends to be milder with average temperatures ranging from -8°C (19°F) to a maximum of 15°C (59°F) and a higher humidity level of 85%. The month also sees significant precipitation, totaling 223 mm (8.8 in) over 26 days, making it a relatively wet period. In contrast, October experiences colder temperatures, with averages between -12°C (10°F) and 13°C (55°F). The month is notably drier, receiving only 49 mm (1.9 in) of precipitation across 14 days and with a decrease in humidity to 68%. This shift heralds the transition into a more wintry climate as autumn progresses. For a detailed look at what to expect during this month, visit Jomsom weather in October.

September and November showcase a significant shift in weather patterns. In September, temperatures range from a minimum of -8°C (19°F) to a maximum of 15°C (59°F), with an average of 7°C (45°F) and high humidity at 85%. Additionally, it experiences considerable precipitation totaling 223 mm (8.8 in) over 26 days, resulting in a damp atmosphere. In contrast, November brings much colder temperatures, with a minimum of -21°C (-5°F) and an average of -3°C (27°F), peaking at 10°C (50°F). The month is much drier, receiving only 27 mm (1.1 in) of precipitation across 7 days, while humidity drops to 54%. For more details on November's weather, you can visit Jomsom weather in November.

In September, the weather is notably milder, with temperatures ranging from a minimum of -8°C (19°F) to a maximum of 15°C (59°F) and an average of 7°C (45°F). This month also experiences a high level of precipitation at 223 mm (8.8 in) over 26 days, contributing to the overall humidity of 85%. In contrast, December brings much colder conditions, with temperatures dropping to a minimum of -24°C (-11°F) and an average of -9°C (16°F), peaking at just 7°C (45°F). This month sees significantly less precipitation, totaling 48 mm (1.9 in) over only 7 days, and a drop in humidity to 50%. For more on the weather conditions in December, you can visit Jomsom weather in December.

Compare Jomsom's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Jomsom

As September arrives in Jomsom, the weather takes a notable turn, characterized by a chilly temperament. The warm summer days give way to significantly cooler temperatures, with nights plunging to bitter lows. This month is particularly marked by heavy rainfall, as twenty-six days are often drenched, contributing to a high humidity level of 85% that can feel quite oppressive. Compared to other months, September stands out with its unpredictable weather patterns and cooler climate, creating a unique atmosphere in this picturesque town. For a deeper understanding of how Jomsom's weather evolves throughout the year, visit Jomsom Climate.