January Weather in Trn, Bosnia and Herzegovina

Last updated: August 22, 2025

In Trn, Bosnia and Herzegovina, the average temperature in January hovers around 1°C (34°F), with minimums plunging to -21°C (-5°F) and maximums reaching up to 17°C (64°F). Expect a precipitation amount of 65 mm (2.6 in) spread over 10 days, along with an average humidity level of 89%. Be prepared for a chilly, damp experience!

January Temperature in Trn

In January in Trn, the average temperature is 1°C (34°F), with a maximum that can reach 17°C (64°F) and a minimum that can drop as low as -21°C (-5°F). Be sure to pack layers to stay comfortable while exploring the diverse weather conditions.

January Weather in Trn: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Trn, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Trn, January typically has an average temperature of 1°C (34°F), with highs reaching up to 17°C (64°F) and lows dropping to around -21°C (-5°F).

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

January Precipitation in Trn

In Trn in January, the precipitation amount is 65 mm (2.6 in) over a span of 10 days.

January Precipitation Trends in Trn

The chart displays monthly precipitation patterns in Trn, 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 Trn, January typically receives around 65 mm (2.6 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Trn

In Trn in January humidity is 89%. With an average temperature of 1°C (34°F), this humidity feels like a chilling dampness that seeps into your bones, making travel uncomfortable and requiring extra layers to combat the cold and moisture.

January Average Humidity in Trn

This chart illustrates the average monthly humidity levels in Trn, 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 Trn is approximately 89%, 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 Trn

In Trn in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Trn, you can visit Hourly UV Index in Trn.

Maximum UV Index Levels in Trn for January

The chart shows the monthly maximum UV Index (UVI) for Trn 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 Trn typically reaches 2, which falls under the low exposure category.

Data source: Trn 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 Trn Compares to Other Months

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

This table compares monthly weather conditions in Trn, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	65 mm (2.6 inches)	89%	low
February Weather	4°C (40°F)	74 mm (2.9 inches)	83%	moderate
March Weather	7°C (45°F)	70 mm (2.8 inches)	75%	moderate
April Weather	11°C (53°F)	86 mm (3.4 inches)	72%	high
May Weather	16°C (61°F)	127 mm (5.0 inches)	70%	very high
June Weather	20°C (69°F)	103 mm (4.0 inches)	69%	very high
July Weather	22°C (71°F)	100 mm (3.9 inches)	64%	very high
August Weather	22°C (72°F)	77 mm (3.0 inches)	51%	very high
September Weather	17°C (63°F)	67 mm (2.6 inches)	62%	high
October Weather	12°C (54°F)	94 mm (3.7 inches)	81%	moderate
November Weather	7°C (46°F)	75 mm (3.0 inches)	87%	moderate
December Weather	4°C (39°F)	105 mm (4.1 inches)	88%	low