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September Weather in Sundar Basti, Nepal

Last updated: August 31, 2025

In September, the average temperature in Sundar Basti, Nepal is a pleasant 25°C (78°F). Expect a minimum of 18°C (65°F) and a peak at 33°C (92°F). During this period, precipitation amounts to 510 mm (20.1 in) over approximately 26 days, resulting in an average humidity of 91%.

September Temperature in Sundar Basti

In September in Sundar Basti, the average temperature is 25°C (78°F). The maximum can reach 33°C (92°F), while the minimum can drop to as low as 18°C (65°F). Overall, this makes Sundar Basti an ideal destination for travelers looking to enjoy mild and comfortable weather during this time of year.

September Weather in Sundar Basti: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sundar Basti, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sundar Basti, September typically has an average temperature of 25°C (78°F), with highs reaching up to 33°C (92°F) and lows dropping to around 18°C (65°F).
JanFebMarAprMayJunJulAugSepOctNovDec545965707478787977736457
Data source: Temperature data for Sundar Basti generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Sundar Basti

In Sundar Basti in September, the precipitation amount reaches 510 mm (20.1 in) over a span of 26 days.

September Precipitation Trends in Sundar Basti

The chart displays monthly precipitation patterns in Sundar Basti, 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 Sundar Basti, September typically receives around 510 mm (20.1 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec34486679200474748569510651023
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sundar Basti

In Sundar Basti in September, humidity is 91%. With an average temperature of 25°C (78°F), this humidity feels like a warm, sticky embrace, making travel feel heavy and sluggish as you navigate through the air thick with moisture.

September Average Humidity in Sundar Basti

This chart illustrates the average monthly humidity levels in Sundar Basti, 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 Sundar Basti is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec66%55%39%24%36%65%90%91%91%86%79%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sundar Basti

In Sundar Basti in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Sundar Basti.

Maximum UV Index Levels in Sundar Basti for September

The chart shows the monthly maximum UV Index (UVI) for Sundar Basti 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 Sundar Basti typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5691011121413111075
Data source: Sundar Basti 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.

How September Weather in Sundar Basti Compares to Other Months

Weather in Sundar Basti varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sundar Basti, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Sundar Basti, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)34 mm (1.4 inches)65%moderate
February Weather15°C (59°F)48 mm (1.9 inches)55%high
March Weather18°C (65°F)66 mm (2.6 inches)39%very high
April Weather21°C (70°F)79 mm (3.1 inches)24%very high
May Weather23°C (74°F)200 mm (7.9 inches)36%extreme
June Weather25°C (78°F)474 mm (18.7 inches)65%extreme
July Weather26°C (78°F)748 mm (29.5 inches)90%extreme
August Weather26°C (79°F)569 mm (22.4 inches)91%extreme
September Weather25°C (78°F)510 mm (20.1 inches)91%extreme
October Weather23°C (73°F)65 mm (2.6 inches)86%very high
November Weather18°C (64°F)9 mm (0.4 inches)79%high
December Weather14°C (57°F)23 mm (0.9 inches)75%moderate

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