December Weather in Peru, United States

Last updated: June 24, 2025

In December, the average temperature in Peru, United States hovers around 2°C (35°F). Expect a chilly range with minimums plunging to -22°C (-8°F) and maximums peaking at 17°C (63°F). Rainfall can be expected, with an average precipitation of 67 mm (2.6 in) spread over 9 days, contributing to an average humidity of a crisp 86%.

December Temperature in Peru

In December in Peru, the average temperature is 2°C (35°F). The maximum can reach 17°C (63°F), while the minimum can drop as low as -22°C (-8°F). Be prepared for a wide range of temperatures, making it essential to dress in layers for your travels.

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

The chart illustrates December temperature patterns in Peru, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Peru, December typically has an average temperature of 2°C (35°F), with highs reaching up to 17°C (63°F) and lows dropping to around -22°C (-8°F).

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

December Precipitation in Peru

In Peru in December, the total precipitation amount is 67 mm (2.6 in), occurring over a span of 9 days.

December Precipitation Trends in Peru

The chart displays monthly precipitation patterns in Peru, 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 Peru, December typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 9 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 Peru

In Peru in December humidity is 86%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling quite uncomfortable as your clothes cling to you and the cold air cuts through any warmth you try to find.

December Average Humidity in Peru

This chart illustrates the average monthly humidity levels in Peru, 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 Peru is approximately 86%, 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 Peru

In Peru in December, 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 Peru, you can visit Hourly UV Index in Peru.

Maximum UV Index Levels in Peru for December

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

Data source: Peru 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 Peru Compares to Other Months

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

This table compares monthly weather conditions in Peru, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	76 mm (3.0 inches)	85%	moderate
February Weather	-1°C (31°F)	81 mm (3.2 inches)	85%	moderate
March Weather	5°C (41°F)	103 mm (4.0 inches)	86%	high
April Weather	10°C (51°F)	93 mm (3.7 inches)	87%	very high
May Weather	17°C (63°F)	151 mm (5.9 inches)	81%	very high
June Weather	23°C (73°F)	107 mm (4.2 inches)	82%	very high
July Weather	24°C (76°F)	105 mm (4.2 inches)	81%	very high
August Weather	23°C (73°F)	107 mm (4.2 inches)	79%	very high
September Weather	20°C (69°F)	65 mm (2.6 inches)	78%	very high
October Weather	14°C (57°F)	102 mm (4.0 inches)	81%	high
November Weather	5°C (41°F)	81 mm (3.2 inches)	89%	moderate
December Weather	2°C (35°F)	67 mm (2.6 inches)	86%	low