September Weather in Siraha, Nepal

Last updated: August 31, 2025

In September, the average temperature in Siraha, Nepal hovers around 29°C (84°F). Expect a range from a comfortable low of 22°C (73°F) to a sweltering high of 36°C (97°F). With an average humidity of 92%, it's advisable to stay hydrated and cool. Be prepared for the 224 mm (8.8 in) of precipitation spread across 22 days, making this a month of warmth and occasional showers.

September Temperature in Siraha

In September in Siraha, the average temperature is 29°C (84°F), with maximums reaching 36°C (97°F) and minimums dropping to as low as 22°C (73°F). This makes it an ideal time for travelers seeking warm and pleasant weather.

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

The chart illustrates September temperature patterns in Siraha, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siraha, September typically has an average temperature of 29°C (84°F), with highs reaching up to 36°C (97°F) and lows dropping to around 22°C (73°F).

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

September Precipitation in Siraha

In Siraha in September, the precipitation amount is 224 mm (8.8 in) spread over 22 days.

September Precipitation Trends in Siraha

The chart displays monthly precipitation patterns in Siraha, 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 Siraha, September typically receives around 224 mm (8.8 inches) of precipitation spread over approximately 22 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Siraha

In Siraha 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 Siraha

This chart illustrates the average monthly humidity levels in Siraha, 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 Siraha 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 Siraha

In Siraha 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 Siraha.

Maximum UV Index Levels in Siraha for September

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

Data source: Siraha 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 Siraha Compares to Other Months

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

This table compares monthly weather conditions in Siraha, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	15°C (60°F)	7 mm (0.3 inches)	58%	moderate
February Weather	19°C (66°F)	14 mm (0.5 inches)	53%	high
March Weather	25°C (77°F)	14 mm (0.6 inches)	32%	very high
April Weather	29°C (84°F)	36 mm (1.4 inches)	25%	very high
May Weather	30°C (86°F)	98 mm (3.9 inches)	46%	very high
June Weather	30°C (87°F)	173 mm (6.8 inches)	77%	extreme
July Weather	29°C (85°F)	445 mm (17.5 inches)	92%	extreme
August Weather	29°C (85°F)	274 mm (10.8 inches)	92%	extreme
September Weather	29°C (84°F)	224 mm (8.8 inches)	92%	extreme
October Weather	26°C (80°F)	78 mm (3.1 inches)	87%	very high
November Weather	22°C (71°F)	0 mm (0.0 inches)	76%	high
December Weather	17°C (63°F)	8 mm (0.3 inches)	71%	moderate