December weather forecast
Cusco, Peru

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An early morning panorama of the Plaza de Armas in Cusco, Peru
An early morning panorama of the Plaza de Armas in Cusco, Peru

Weather in December

December ushers in the culmination of the year marked with significant precipitation and cooler temperatures in Cusco, Peru. It stands as one of the rainiest months with significant rainfall registering at 123mm (4.84") marked across 16 days of the month. Nonetheless, the city's charm remains untouched, with the holiday season adding a warm festive glow. Despite the rainy conditions, travellers should bear in mind that when rain isn't present, the combination of high altitude and direct sun may feel warmer than anticipated. Enjoy the festive atmosphere, yuletide cuisine and the finest artisan crafts in a less crowded, authentic Cusco experience during this festive month.

Temperature

Cusco's weather, upon December's arrival, documents an average high-temperature of a still pleasant 20.8°C (69.4°F), nearly identical to the prior month. Despite high daytime temperatures, the average temperature in Cusco, Peru, lowers to a chilly 6.5°C (43.7°F) during December nights.

Humidity

The average relative humidity in December in Cusco is 59%.

Rainfall

In Cusco, Peru, in December, it is raining for 16 days, with typically 123mm (4.84") of accumulated precipitation. Throughout the year, in Cusco, there are 102 rainfall days, and 708mm (27.87") of precipitation is accumulated.

Daylight

With an average of 12h and 54min of daylight, December has the longest days of the year in Cusco.
On the first day of December, sunrise is at 05:11 and sunset at 18:03. On the last day of the month, sunrise is at 05:23 and sunset at 18:18 -05.

Sunshine

The average sunshine in December is 5.1h.

UV index

January through April, August through December, with an average maximum UV index of 12, are months with the highest UV index in Cusco. A UV Index value of 11, and more, symbolizes an extreme health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum UV index of 12 in December translates into the following recommendations:
Put into action all crucial precautions. Defense against sun damage is a must. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
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Frequently asked questions

What is the usual temperature for Cusco in December?

The high-temperature, in December, in Cusco, records 20.8°C (69.4°F), while the low-temperature is 6.5°C (43.7°F).

What is the average humidity in December in Cusco?

In December, the average relative humidity in Cusco is 59%.

How many days does it rain in December in Cusco?

In December, in Cusco, Peru, the rain falls for 16 days. Throughout December, 123mm (4.84") of precipitation is accumulated.

When are the longest days in Cusco?

With an average of 12h and 54min of daylight, December has the longest days of the year.

What is the average length of the day in December in Cusco?

In December, the average day length in Cusco is 12h and 55min.

When is the sunrise / sunset in December in Cusco?

In December, on the first day of the month, sunrise is at 05:11 and sunset at 18:03. On the last day of the month, in Cusco, sunrise is at 05:23 and sunset at 18:18 -05.

How long on average sun shines in December in Cusco?

In Cusco, the average sunshine duration in December is 5.1h.

What are the months with the highest UV index in Cusco?

January through April, August through December, with an average maximum UV index of 12, are months with the highest UV index in Cusco, Peru.

What is the UV index reading in December in Cusco?

In Cusco, Peru, the average daily maximum UV index in December is 12. A UV Index estimate of 11, and higher, represents an extreme health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in December
Cusco, Peru

Average temperature in December - Cusco, Peru
  • Average high temperature in December: 20.8°C

The warmest month (with the highest average high temperature) is October (20.9°C).
The months with the lowest average high temperature are January and February (18.8°C).

  • Average low temperature in December: 6.5°C

The months with the highest average low temperature are January and February (6.6°C).
The coldest month (with the lowest average low temperature) is July (0.2°C).

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Average humidity in December
Cusco, Peru

Average humidity in December - Cusco, Peru
  • Average humidity in December: 59%

The month with the highest relative humidity is February (66%).
The month with the lowest relative humidity is August (46%).

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Average rainfall in December
Cusco, Peru

Average rainfall in December - Cusco, Peru
  • Average rainfall in December: 122.7mm

The wettest month (with the highest rainfall) is January (145.3mm).
The driest month (with the least rainfall) is June (1.5mm).

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Average rainfall days in December
Cusco, Peru

Average rainfall days in December - Cusco, Peru
  • Average rainfall days in December: 16 days

The month with the highest number of rainy days is January (18 days).
The months with the least rainy days are June, July and August (2 days).

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Average daylight in December /
Average sunshine in December
Cusco, Peru

Average daylight in December / Average sunshine in December - Cusco, Peru
  • Average daylight in December: 12h and 5min

The month with the longest days is December (Average daylight: 12h and 54min).
The month with the shortest days is June (Average daylight: 11h and 18min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 8h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

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Average UV index in December
Cusco, Peru

Average UV index in December - Cusco, Peru
  • Average UV index in December: 12

The months with the highest UV index are January, February, March, April, August, September, October, November and December (UV index 12).
The months with the lowest UV index are June and July (UV index 10).

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Cusco, Peru

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