September Weather in Rajbiraj, Nepal

Last updated: August 31, 2025

In Rajbiraj, Nepal, the average temperature in September hovers around 29°C (84°F), making it a warm destination. Expect lows of 22°C (72°F) and highs reaching up to 37°C (98°F). However, with an average humidity of 92% and 320 mm (12.6 in) of precipitation spread over 25 days, be prepared for a rather damp tropical experience.

September Temperature in Rajbiraj

In September in Rajbiraj, the average temperature is 29°C (84°F), with maximums reaching up to 37°C (98°F) and minimums dipping to as low as 22°C (72°F). This makes it an ideal time for travelers seeking warm weather and plenty of sunshine.

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

The chart illustrates September temperature patterns in Rajbiraj, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rajbiraj, September typically has an average temperature of 29°C (84°F), with highs reaching up to 37°C (98°F) and lows dropping to around 22°C (72°F).

Data source: Temperature data for Rajbiraj generated using information from the Copernicus Climate Change Service.

September Precipitation in Rajbiraj

In Rajbiraj in September, the total precipitation amount is 320 mm (12.6 in) spread over 25 days.

September Precipitation Trends in Rajbiraj

The chart displays monthly precipitation patterns in Rajbiraj, 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 Rajbiraj, September typically receives around 320 mm (12.6 inches) of precipitation spread over approximately 25 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Rajbiraj

In Rajbiraj in September, humidity is 92%. With an average temperature of 29°C (84°F), this humidity feels like a heavy blanket enveloping you, making travel feel sticky and intense as sweat clings to your skin and every breeze becomes a fleeting relief.

September Average Humidity in Rajbiraj

This chart illustrates the average monthly humidity levels in Rajbiraj, 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 Rajbiraj is approximately 92%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rajbiraj

In Rajbiraj in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Rajbiraj.

Maximum UV Index Levels in Rajbiraj for September

The chart shows the monthly maximum UV Index (UVI) for Rajbiraj 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 Rajbiraj typically reaches 12, which falls under the extreme exposure category.

Data source: Rajbiraj 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 Rajbiraj Compares to Other Months

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

This table compares monthly weather conditions in Rajbiraj, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (61°F)	6 mm (0.2 inches)	58%	moderate
February Weather	19°C (67°F)	21 mm (0.8 inches)	53%	high
March Weather	25°C (77°F)	20 mm (0.8 inches)	32%	very high
April Weather	28°C (83°F)	58 mm (2.3 inches)	25%	very high
May Weather	29°C (84°F)	113 mm (4.4 inches)	46%	very high
June Weather	30°C (86°F)	279 mm (11.0 inches)	77%	extreme
July Weather	29°C (85°F)	436 mm (17.2 inches)	92%	extreme
August Weather	29°C (85°F)	342 mm (13.5 inches)	92%	extreme
September Weather	29°C (84°F)	320 mm (12.6 inches)	92%	extreme
October Weather	27°C (81°F)	107 mm (4.2 inches)	87%	very high
November Weather	22°C (72°F)	1 mm (0.0 inches)	76%	high
December Weather	17°C (64°F)	8 mm (0.3 inches)	71%	moderate