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December Weather in Arma, Peru

Last updated: August 27, 2025

In Arma, Peru, the average temperature in December hovers around 5°C (41°F). Expect chilly days, with nighttime lows dipping to a brisk -6°C (22°F), while daytime highs can reach a mild 13°C (55°F). This month also sees a substantial precipitation amount of 217 mm (8.5 in) over approximately 28 days, contributing to a high average humidity of 87%.

December Temperature in Arma

In December in Arma, the average temperature is 5°C (41°F), with a maximum that can reach 13°C (55°F) and a minimum that can drop to -6°C (22°F). Travelers should pack accordingly to stay warm while enjoying the crisp winter atmosphere.

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

The chart illustrates December temperature patterns in Arma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arma, December typically has an average temperature of 5°C (41°F), with highs reaching up to 13°C (55°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec414141403938383939404141
Data source: Temperature data for Arma 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 Arma

In Arma in December, the total precipitation amount is 217 mm (8.5 in) spread out over 28 days.

December Precipitation Trends in Arma

The chart displays monthly precipitation patterns in Arma, 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 Arma, December typically receives around 217 mm (8.5 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec230257277159101454258137175173217
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Arma

In Arma in December humidity is 87%. With an average temperature of 5°C (41°F), this humidity feels like a heavy, damp blanket enveloping you, making every step seem laborious and the chill more biting, which can be quite challenging for traveling.

December Average Humidity in Arma

This chart illustrates the average monthly humidity levels in Arma, 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 Arma is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%89%90%89%83%69%56%51%53%68%82%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Arma

In Arma in December, the maximum UV index reaches 19, which corresponds to an extreme exposure category. With a time to burn of just 10 minutes, it’s essential to take precautions. For detailed information, you can check the hourly UV index in Arma.

Maximum UV Index Levels in Arma for December

The chart shows the monthly maximum UV Index (UVI) for Arma 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 Arma typically reaches 19, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec192019181512141517191919
Data source: Arma 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 Arma Compares to Other Months

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

This table compares monthly weather conditions in Arma, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)230 mm (9.1 inches)89%extreme
February Weather5°C (41°F)257 mm (10.1 inches)89%extreme
March Weather5°C (41°F)277 mm (10.9 inches)90%extreme
April Weather5°C (41°F)159 mm (6.2 inches)89%extreme
May Weather4°C (39°F)101 mm (4.0 inches)83%extreme
June Weather3°C (38°F)45 mm (1.8 inches)69%extreme
July Weather3°C (38°F)42 mm (1.6 inches)56%extreme
August Weather4°C (39°F)58 mm (2.3 inches)50%extreme
September Weather4°C (40°F)137 mm (5.4 inches)53%extreme
October Weather5°C (40°F)175 mm (6.9 inches)68%extreme
November Weather5°C (41°F)173 mm (6.8 inches)81%extreme
December Weather5°C (41°F)217 mm (8.5 inches)87%extreme

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