December Weather in Siwan, India

Last updated: August 23, 2025

In December, the average temperature in Siwan, India hovers around 17°C (63°F), with fluctuations that can see a minimum of 5°C (41°F) and a maximum of 29°C (85°F). Expect a light touch of precipitation at 21 mm (0.8 in) over just 0 days, while the air remains comfortably humid with an average humidity level of 75%.

December Temperature in Siwan

In December in Siwan, the average temperature is 17°C (63°F). Maximums can reach 29°C (85°F), while minimums can drop as low as 5°C (41°F). This varied climate makes Siwan an ideal destination for travelers looking to experience a mix of warm days and cool evenings.

December Weather in Siwan: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Siwan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siwan, December typically has an average temperature of 17°C (63°F), with highs reaching up to 29°C (85°F) and lows dropping to around 5°C (41°F).

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

December Precipitation in Siwan

In Siwan in December, the precipitation amount is 21 mm (0.8 in) over a span of 0 days.

December Precipitation Trends in Siwan

The chart displays monthly precipitation patterns in Siwan, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Siwan, December typically receives around 21 mm (0.8 inches) of precipitation spread over approximately 0 days.

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

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Millimeters (mm) Inches (in)

December Humidity in Siwan

In Siwan in December, humidity is 75%. With an average temperature of 17°C (63°F), this humidity feels like a warm embrace, making outdoor activities a bit sticky and requiring frequent breaks to stay refreshed during your travels.

December Average Humidity in Siwan

This chart illustrates the average monthly humidity levels in Siwan, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Siwan is approximately 75%, offering insight into how humid the weather typically is during this month.

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

December UV Index in Siwan

In Siwan in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Siwan.

Maximum UV Index Levels in Siwan for December

The chart shows the monthly maximum UV Index (UVI) for Siwan in December, 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 December, the maximum UV index in Siwan typically reaches 5, which falls under the moderate exposure category.

Data source: Siwan December 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 December Weather in Siwan Compares to Other Months

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

This table compares monthly weather conditions in Siwan, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	15°C (59°F)	10 mm (0.4 inches)	65%	moderate
February Weather	19°C (66°F)	10 mm (0.4 inches)	55%	high
March Weather	25°C (77°F)	10 mm (0.4 inches)	39%	very high
April Weather	30°C (87°F)	14 mm (0.5 inches)	24%	very high
May Weather	31°C (89°F)	69 mm (2.7 inches)	36%	very high
June Weather	32°C (89°F)	183 mm (7.2 inches)	65%	very high
July Weather	30°C (86°F)	439 mm (17.3 inches)	90%	extreme
August Weather	30°C (86°F)	337 mm (13.3 inches)	91%	extreme
September Weather	29°C (85°F)	250 mm (9.8 inches)	91%	extreme
October Weather	27°C (81°F)	56 mm (2.2 inches)	86%	very high
November Weather	22°C (72°F)	0 mm (0.0 inches)	79%	high
December Weather	17°C (63°F)	21 mm (0.8 inches)	75%	moderate