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December Weather in Cosos, Peru

Last updated: August 27, 2025

In December, the average temperature in Cosos, Peru hovers around 17°C (63°F). Visitors can expect temperatures to range from a cool 10°C (51°F) to a warm 26°C (78°F). The city experiences a light precipitation of 13 mm (0.5 in) over approximately 3 days, complemented by a high average humidity of 83%. Whether you're basking in the warmth or enjoying the occasional rain, Cosos has a unique charm this season!

December Temperature in Cosos

In December in Cosos, the average temperature is 17°C (63°F). Maximum temperatures can reach 26°C (78°F), while minimums can drop to as low as 10°C (51°F). It's a great time to explore Cosos with mild weather, so pack accordingly for both warm days and cooler nights!

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

The chart illustrates December temperature patterns in Cosos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cosos, December typically has an average temperature of 17°C (63°F), with highs reaching up to 26°C (78°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec626162626261606163636363
Data source: Temperature data for Cosos generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Cosos

In Cosos in December, the precipitation amount is 13 mm (0.5 in) over a span of 3 days.

December Precipitation Trends in Cosos

The chart displays monthly precipitation patterns in Cosos, 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 Cosos, December typically receives around 13 mm (0.5 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec68655115533024413
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Cosos

In Cosos in December humidity is 83%. With an average temperature of 17°C (63°F), this humidity feels like a warm, sticky embrace that can make traveling uncomfortable, as the air clings to the skin and creates a heavy atmosphere, often leading to fatigue and a longing for the cooling relief of shade or air conditioning.

December Average Humidity in Cosos

This chart illustrates the average monthly humidity levels in Cosos, 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 Cosos is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%88%89%89%88%84%78%77%76%82%83%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Cosos

In Cosos in December, the maximum UV index reaches an alarming 17, which falls under the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to stay protected. For more details on the hourly UV index in Cosos, you can check Hourly UV Index in Cosos.

Maximum UV Index Levels in Cosos for December

The chart shows the monthly maximum UV Index (UVI) for Cosos 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 Cosos typically reaches 17, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec181717141210111315171717
Data source: Cosos 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 Cosos Compares to Other Months

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

This table compares monthly weather conditions in Cosos, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (62°F)68 mm (2.7 inches)86%extreme
February Weather16°C (62°F)65 mm (2.6 inches)88%extreme
March Weather16°C (62°F)51 mm (2.0 inches)89%extreme
April Weather17°C (62°F)15 mm (0.6 inches)89%extreme
May Weather17°C (62°F)5 mm (0.2 inches)88%extreme
June Weather16°C (61°F)3 mm (0.1 inches)84%very high
July Weather16°C (61°F)3 mm (0.1 inches)78%extreme
August Weather16°C (61°F)0 mm (0.0 inches)76%extreme
September Weather17°C (63°F)2 mm (0.1 inches)76%extreme
October Weather17°C (64°F)4 mm (0.2 inches)82%extreme
November Weather17°C (63°F)4 mm (0.2 inches)83%extreme
December Weather17°C (63°F)13 mm (0.5 inches)83%extreme

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