January Weather in Si'en, China

Last updated: August 22, 2025

In January, the average temperature in Si'en, China hovers around 11°C (52°F). Expect minimum temperatures to dip to 0°C (33°F) and soar to a pleasant 24°C (76°F). This month, precipitation averages around 80 mm (3.1 in) over 12 days, contributing to an average humidity of 59%.

January Temperature in Si'en

In January in Si'en, the average temperature is 11°C (52°F). Maximums can reach 24°C (76°F), and minimums can be as low as 0°C (33°F). This means travelers should be prepared for a mix of mild and cool weather, making it a great time to explore the area.

January Weather in Si'en: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Si'en, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Si'en, January typically has an average temperature of 11°C (52°F), with highs reaching up to 24°C (76°F) and lows dropping to around 0°C (33°F).

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

January Precipitation in Si'en

In Si'en in January, the total precipitation amount is 80 mm (3.1 in) spread over 12 days.

January Precipitation Trends in Si'en

The chart displays monthly precipitation patterns in Si'en, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Si'en, January typically receives around 80 mm (3.1 inches) of precipitation spread over approximately 12 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Si'en

In Si'en in January humidity is 59%. With an average temperature of 11°C (52°F), this humidity feels like a cool, crisp morning—refreshing yet slightly damp, making for a lively atmosphere perfect for exploring the local sights.

January Average Humidity in Si'en

This chart illustrates the average monthly humidity levels in Si'en, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Si'en is approximately 59%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Si'en

In Si'en in January, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Si'en.

Maximum UV Index Levels in Si'en for January

The chart shows the monthly maximum UV Index (UVI) for Si'en in January, 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 January, the maximum UV index in Si'en typically reaches 7, which falls under the high exposure category.

Data source: Si'en January 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 January Weather in Si'en Compares to Other Months

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

This table compares monthly weather conditions in Si'en, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (52°F)	80 mm (3.1 inches)	59%	high
February Weather	12°C (55°F)	94 mm (3.7 inches)	67%	very high
March Weather	17°C (63°F)	184 mm (7.2 inches)	70%	extreme
April Weather	20°C (69°F)	191 mm (7.5 inches)	67%	extreme
May Weather	24°C (76°F)	292 mm (11.5 inches)	84%	extreme
June Weather	27°C (80°F)	429 mm (16.9 inches)	87%	extreme
July Weather	28°C (83°F)	258 mm (10.1 inches)	89%	extreme
August Weather	28°C (83°F)	261 mm (10.3 inches)	86%	extreme
September Weather	27°C (80°F)	170 mm (6.7 inches)	66%	extreme
October Weather	21°C (71°F)	131 mm (5.1 inches)	66%	very high
November Weather	17°C (63°F)	89 mm (3.5 inches)	69%	very high
December Weather	12°C (54°F)	56 mm (2.2 inches)	68%	high