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December Weather in Casma, Peru

Last updated: August 27, 2025

In Casma, Peru, the average temperature in December hovers around 20°C (68°F). Expect a comfortable range, with minimum temperatures dipping to 17°C (62°F) and maximums rising to 26°C (80°F). However, be prepared for some rain, as the area receives about 28 mm (1.1 in) of precipitation over 5 days. Don't forget, the average humidity is a significant 91%, adding a touch of tropical flair to your experience!

December Temperature in Casma

In December in Casma, the average temperature is 20°C (68°F). Maximum temperatures can reach 26°C (80°F), while the minimum can drop to as low as 17°C (62°F). This makes it an ideal time for travelers to enjoy mild weather and outdoor activities.

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

The chart illustrates December temperature patterns in Casma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Casma, December typically has an average temperature of 20°C (68°F), with highs reaching up to 26°C (80°F) and lows dropping to around 17°C (62°F).
JanFebMarAprMayJunJulAugSepOctNovDec707272696866666564656668
Data source: Temperature data for Casma 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 Casma

In Casma in December, the precipitation amount is 28 mm (1.1 in) over a period of 5 days.

December Precipitation Trends in Casma

The chart displays monthly precipitation patterns in Casma, 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 Casma, December typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec30244917610159828
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Casma

In Casma in December, humidity is 91%. With an average temperature of 20°C (68°F), this humidity feels like a heavy blanket wrapping around you, making travel feel stifling and often exhausting, as each step you take requires more effort in the thick, muggy air.

December Average Humidity in Casma

This chart illustrates the average monthly humidity levels in Casma, 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 Casma is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%90%89%84%73%55%53%62%82%89%91%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Casma

In Casma in December, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Casma.

Maximum UV Index Levels in Casma for December

The chart shows the monthly maximum UV Index (UVI) for Casma 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 Casma typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141415131210101113141413
Data source: Casma 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 Casma Compares to Other Months

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

This table compares monthly weather conditions in Casma, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather21°C (70°F)30 mm (1.2 inches)91%extreme
February Weather22°C (72°F)24 mm (1.0 inches)89%extreme
March Weather22°C (72°F)49 mm (1.9 inches)89%extreme
April Weather21°C (70°F)17 mm (0.7 inches)88%extreme
May Weather20°C (68°F)6 mm (0.2 inches)84%extreme
June Weather19°C (67°F)1 mm (0.0 inches)73%very high
July Weather19°C (66°F)0 mm (0.0 inches)55%very high
August Weather18°C (65°F)1 mm (0.0 inches)53%extreme
September Weather18°C (64°F)5 mm (0.2 inches)62%extreme
October Weather18°C (65°F)9 mm (0.3 inches)82%extreme
November Weather19°C (66°F)8 mm (0.3 inches)89%extreme
December Weather20°C (68°F)28 mm (1.1 inches)91%extreme

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