December weather forecast
Peru

December in Peru marks the beginning of summer on the coast and the continuation of the rainy season in the highlands and Amazon, each with distinct weather patterns.

In the coastal region, cities such as Lima and Trujillo welcome summer with rising temperatures. The average temperature ranges from 22°C (71.6°F) to 28°C (82.4°F), marking some of the warmest weather of the year in this region. Rainfall remains virtually absent, in keeping with the area's predominantly arid climate.

The Andean highlands, encompassing cities like Cusco and Arequipa, experience heavier rainfall as the wet season persists. Average precipitation levels can reach approximately 120mm (4.72") in December. Despite the rainy weather, daytime temperatures remain relatively consistent, usually fluctuating between 12°C (53.6°F) to 22°C (71.6°F). At night, temperatures can fall close to freezing, particularly at higher altitudes.

In the Amazon rainforest, December brings an increase in rainfall. Cities like Iquitos and Puerto Maldonado can expect average precipitation levels around 240mm (9.45"). Despite the wet conditions, temperatures continue to remain high, generally exceeding 30°C (86°F).

In comparison to November, December sees a continuation of the rising temperatures on the coast and an increase in rainfall in the Andean and Amazon regions. This shift marks the onset of the summer season in the coastal region and the peak of the rainy season in the highlands and the rainforest. Looking forward to January, these patterns continue, with warmer temperatures on the coast and substantial rainfall in the Andean and Amazon regions.

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• Lima - December »
  The most humid month is December, with an average relative humidity of 79%. The months with the highest UV index are January through April, November and December, with an average maximum UV index of 6.
• Arequipa - December »
  In Arequipa during December, the rain falls for 8.4 days and regularly aggregates up to 20mm (0.79") of precipitation. December holds its charm with a pleasant balance of warm days and cool nights, fittingly wrapping up the year in Arequipa.
• Cusco - December »
  In Cusco, Peru, in December, it is raining for 16 days, with typically 123mm (4.84") of accumulated precipitation. January through April, August through December, with an average maximum UV index of 12, are months with the highest UV index in Cusco, Peru.
• Trujillo - December »
  The months with the highest UV index in Trujillo, Peru, are January through April, September through December, with an average maximum UV index of 12. The months with the highest UV index in Trujillo are January through April, September through December, with an average maximum UV index of 12.
• Chiclayo - December »
  The arrival of December in Chiclayo brings an average high-temperature of a still moderately hot 24.1°C (75.4°F), closely following the temperature pattern of November. A visit to Chiclayo in December assures days filled with sunshine, warm breezes and comforting tropical vibes.
• Iquitos - December »
  On the last day of December, in Iquitos sunrise is at 05:46 and sunset at 18:06 -05. In Iquitos, Peru, in December, it is raining for 26 days, with typically 173mm (6.81") of accumulated precipitation.
• Callao - December »
  The months with the least rainfall in Callao, Peru, are January, April, May, September through December Rain falls for 1.5 days and accumulates 1mm (0.04") of rain. January, April, May, September through December are months with the least rain in Callao when the rain falls for 1.5 days and typically aggregates up to 1mm (0.04") of rain.
• Pucallpa - December »
  On the first day of December in Pucallpa sunrise is at 05:30 and sunset at 18:04. December has the longest days of the year in Pucallpa, with an average of 12h and 36min of daylight.
• Tacna - December »
  The month with the longest days in Tacna, Peru, is December, with an average of 13h and 12min of daylight. In Tacna in December, it is raining for 7.2 days, with typically 10mm (0.39") of accumulated precipitation.
• Chimbote - December »
  The months with the highest humidity in Chimbote are May, June, November and December, with an average relative humidity of 82%. In summary, December is representative of Chimbote's typical summer, featuring warm temperatures, slightly increased rain, and a higher UV index, closing out the weather cycle for the year.
• Ica - December »
  In Ica, Peru, during December, the rain falls for 9.5 days and regularly aggregates up to 11mm (0.43") of precipitation. In Ica, Peru, during December, the rain falls for 9.5 days and regularly aggregates up to 11mm (0.43") of precipitation.