Last updated: August 27, 2025
In December, the average temperature in San Alejandro, Peru hovers around 26°C (79°F). While you might enjoy pleasant warmth, be prepared for fluctuations, as temperatures can dip to a comfortable 21°C (70°F) or soar to a sweltering 35°C (96°F). Expect 308 mm (12.1 in) of rain spread over 28 days, contributing to an average humidity level of 91%, creating a lush and vibrant atmosphere.
In December in San Alejandro, the average temperature is 26°C (79°F), with maximums reaching 35°C (96°F) and minimums dropping as low as 21°C (70°F). This pleasant climate makes San Alejandro an ideal destination for travelers seeking warmth and outdoor adventure.
In San Alejandro in December, the precipitation amount is 308 mm (12.1 in) over the course of 28 days.
In San Alejandro in December, humidity is 91%. With an average temperature of 26°C (79°F), this humidity feels like navigating through an invisible blanket, making even short strolls feel laborious and leaving a sticky sheen on your skin, which can be overwhelming for travelers.
In San Alejandro in December, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Alejandro, you can check here.
UV Risk Categories
Weather in San Alejandro varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Alejandro, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 26°C (79°F) | 304 mm (12.0 inches) | 88% | extreme |
| February Weather | 26°C (79°F) | 364 mm (14.3 inches) | 86% | extreme |
| March Weather | 26°C (78°F) | 406 mm (16.0 inches) | 89% | extreme |
| April Weather | 26°C (78°F) | 240 mm (9.4 inches) | 89% | extreme |
| May Weather | 25°C (78°F) | 178 mm (7.0 inches) | 86% | extreme |
| June Weather | 25°C (77°F) | 99 mm (3.9 inches) | 71% | extreme |
| July Weather | 25°C (77°F) | 86 mm (3.4 inches) | 44% | extreme |
| August Weather | 26°C (79°F) | 76 mm (3.0 inches) | 34% | extreme |
| September Weather | 27°C (81°F) | 117 mm (4.6 inches) | 37% | extreme |
| October Weather | 26°C (80°F) | 236 mm (9.3 inches) | 50% | extreme |
| November Weather | 26°C (79°F) | 341 mm (13.4 inches) | 73% | extreme |
| December Weather | 26°C (79°F) | 308 mm (12.1 inches) | 91% | extreme |