Last updated: August 27, 2025
In Callao, Peru, December heralds the start of summer with maximum temperatures reaching 25°C (76°F) and an average of 20°C (68°F), offering pleasant, warm days. Overnight, temperatures dip to a comfortable minimum of 16°C (62°F). Despite the warmth, humidity levels soar to 87%, creating a tropical ambiance. Rainfall is minimal, with only 17 mm (0.7 in) of precipitation expected over three days of the month, allowing for plenty of opportunities to enjoy the stunning coastal scenery. Embrace the vibrant atmosphere and vibrant culture as Callao welcomes the summer season.
In December, Callao, Peru, transitions into a warmer climate as summer approaches. With minimum temperatures around 16°C (62°F) and averages reaching 20°C (68°F), the city experiences a delightful warmth. The maximum temperatures soar to approximately 25°C (76°F), making it an inviting time for outdoor activities and enjoying the vibrant coastal scenery. This month marks a subtle rise from November's temperatures, showcasing a trend towards warmer days as the year comes to a close. The pleasant climate makes December an ideal month for both locals and tourists to embrace the beauty of Callao's beaches and cultural attractions.
In Callao, Peru, December marks a subtle shift in weather patterns as the city transitions toward the wetter season. With 17 mm (0.7 in) of precipitation spread over three days, rainfall becomes more noticeable compared to the preceding months, where dry conditions prevailed. This increase in moisture reflects a gradual build-up of atmospheric humidity, suggesting a break from the extended dry spell experienced from May to November, where rainfall was minimal. The trend observed in December indicates that as the year closes, the likelihood of rain begins to rise, hinting at a more dynamic climate in the upcoming summer months.
In Callao, Peru, December brings a notable increase in humidity, peaking at 87% after the drier months of July and August, when levels fell to a modest 56% and 50%, respectively. This pattern suggests a distinct seasonal shift as the year winds down. The humidity levels remain relatively high from January to April, hovering around 89-90%, then gradually decline to their annual low before rising again as the year ends. As the holiday season approaches, residents experience a return to the tropical closeness reminiscent of the earlier months, making December feel both festive and humid.
In Callao, Peru, the UV Index reaches notable levels throughout the year, particularly peaking at 14 from January to March and again in November. December maintains a high UV Index of 13, categorized as extreme, which means that sun exposure can result in skin burns in just 10 minutes. The pattern reveals consistently intense UV radiation, especially in the summer months, where the burn time remains notably short across various months. As autumn approaches in May and June, the intensity slightly decreases to a very high index of 10 and 9, allowing for a marginal increase in safe sun exposure time to 15 minutes. However, as the year rounds back into the hotter months, the extreme ratings return, reminding residents and visitors alike to stay vigilant about sun safety. For more detailed information, you can visit Callao UV Index.
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In Callao, Peru, December shines brightly with an impressive 338 hours of sunshine, continuing the trend of abundant sun that characterizes the end of the year. This month joins a series of gradually increasing daylight hours that have captivated locals and visitors alike since October, which boasts the maximum at 340 hours. As the festive season approaches, the sunny skies reflect the vibrancy of the season, marking a striking contrast to the earlier months. Notably, the sunniest days are seen during the mid-year stretch, with hours peaking in August at 335 hours, but December's warmth seems to signal the close of the year on a high note. This delightful trend invites exploration of Callao's stunning coastal beauty, making it a perfect destination for those seeking sun-soaked adventures in the holiday season.
In Callao, Peru, the likelihood of sunny weather shows intriguing seasonal trends. As the year progresses, the chances for sunshine gradually increase, with December experiencing a 22% likelihood, a notable uptick compared to the preceding months. This increase reflects a transition into the sunnier dry season, which begins to peak from May onwards, when sunshine chances soar to 50% and beyond. In contrast, the year starts with a mere 6% chance of sun in January, suggesting that if you're hoping for radiant days in December, you'll be pleasantly surprised by more sun than the previous months, setting the stage for a spirited summer to come.
In Callao, Peru, the daylight duration showcases a fascinating seasonal rhythm. The year begins with a consistent 12 hours of sunlight from January through March, providing ample opportunity for outdoor activities and exploration. As April arrives, the daylight begins to taper slightly to 11 hours, maintaining this duration through the colder months of June to August. However, just as the days seem to shorten, a resurgence occurs in September, restoring daylight back to 12 hours and sustaining this brightness through the end of the year in December. This pattern illustrates a captivating balance, with the city basking in extended daylight during the warmer months while enjoying a brief period of shorter days as it transitions into winter.
As we transition to December, the winds in Callao, Peru exhibit a subtle decline from the stronger gusts of earlier months. With an average wind speed of 2.6 m/s (6 mph), December concludes the year on a moderate note, slightly lower than the peaks reached in July and August, where winds breezed in at around 3.0 to 3.1 m/s (7 mph). This month mirrors the gentle whispers of November, hinting at the gradual shift towards calmer conditions as summer approaches. Observing the broader trend, it's clear that the wind speeds tend to ramp up through mid-year before tapering off, offering a delightful balance that characterizes the coastal allure of Callao during the festive season.
Weather in Callao varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Callao, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January exhibit a noticeable shift in weather patterns. In December, temperatures range from a minimum of 16°C (62°F) to a maximum of 25°C (76°F), with an average of 20°C (68°F). The month sees relatively low precipitation at 17 mm (0.7 in) over just three days, and humidity sits at 87%. In contrast, January experiences slightly warmer temperatures, with a minimum of 17°C (64°F) and a maximum of 27°C (81°F), averaging 21°C (71°F). However, it also brings significantly more rainfall, totaling 47 mm (1.9 in) over 15 days, while humidity increases slightly to 89%. For more detailed information on January weather, visit Callao weather in January.
In December, the weather is generally mild, with temperatures ranging from a minimum of 16°C (62°F) to a maximum of 25°C (76°F) and an average of 20°C (68°F). This month experiences relatively low precipitation, at 17 mm (0.7 in) over just 3 days, and the humidity sits at 87%.
In contrast, February brings slightly warmer temperatures, with a minimum of 18°C (65°F), an average of 22°C (72°F), and a high of 28°C (82°F). However, it is also a wetter month, receiving 53 mm (2.1 in) of rainfall spread over 12 days, coupled with a slightly higher humidity level of 89%. For more detailed information on February weather, you can check out Callao weather in February.
December and March showcase distinct differences in weather patterns. In December, temperatures range from a mild 16°C (62°F) at night to a warm average of 20°C (68°F) during the day, peaking at 25°C (76°F). The month experiences relatively low precipitation, totaling 17 mm (0.7 in) over just 3 days, with humidity at 87%. In contrast, March sees slightly warmer temperatures, with a minimum of 17°C (64°F), an average of 22°C (72°F), and a maximum of 27°C (81°F). However, it's also significantly wetter, receiving 50 mm (2.0 in) of rain across 14 days and a humidity level of 90%. For a more detailed look at March weather, you can visit Callao weather in March.
In December, the weather features a minimum temperature of 16°C (62°F) and an average of 20°C (68°F), with a maximum reaching 25°C (76°F). The month experiences light precipitation totaling 17 mm (0.7 in) over about 3 days, and humidity levels are relatively high at 87%. In comparison, April has a similar temperature range, with a minimum of 15°C (60°F), an average of 20°C (69°F), and a maximum of 26°C (79°F). However, April sees a slight increase in precipitation to 18 mm (0.7 in) over approximately 5 days, accompanied by a marginally higher humidity of 89%. For more detailed information, you can check Callao weather in April.
In December, the weather features slightly warmer temperatures, with a minimum of 16°C (62°F) and an average of 20°C (68°F), peaking at 25°C (76°F). The month experiences greater humidity at 87% and an average of 17 mm (0.7 in) of precipitation over about three days. In contrast, May presents a slightly cooler climate with minimum temperatures of 14°C (58°F) and a comparable maximum of 25°C (78°F). Precipitation is reduced to 9 mm (0.4 in) that typically falls over just one day, accompanied by a lower humidity level of 83%. For more details on May's weather, you can check Callao weather in May.
In December, the weather is generally warmer, with temperatures ranging from a minimum of 16°C (62°F) to a maximum of 25°C (76°F) and an average of 20°C (68°F). This month experiences higher humidity at 87% and some precipitation, with around 17 mm (0.7 in) occurring over three days. In contrast, June is slightly cooler, with temperatures starting at a minimum of 15°C (59°F), averaging 18°C (64°F), and peaking at 21°C (71°F). June is notably drier, with only 10 mm (0.4 in) of precipitation and no rainy days, and a lower humidity level of 69%. For more details on the June weather, you can check Callao weather in June.
December and July present distinct weather patterns, showcasing the transition from the cooler mid-year to the warmer end-of-year period. In December, temperatures range from a minimum of 16°C (62°F) to a maximum of 25°C (76°F), with an average of 20°C (68°F) and relatively high humidity at 87%. This month experiences some precipitation, with an average of 17 mm (0.7 in) over about three days. In contrast, July features a cooler climate, with temperatures ranging from 14°C (57°F) to 21°C (69°F), averaging 17°C (63°F). July boasts a drier profile, recording only 11 mm (0.4 in) of rainfall over no precipitation days and considerably lower humidity at 56%. For more information on July's weather specifics, visit Callao weather in July.
December and August exhibit notable differences in weather conditions. December enjoys warmer temperatures, with a minimum of 16°C (62°F) and an average of 20°C (68°F), peaking at 25°C (76°F). In contrast, August is slightly cooler, featuring a minimum of 14°C (57°F) and an average of 17°C (62°F), with a maximum of 20°C (69°F). Additionally, December experiences higher humidity levels at 87% and receives more precipitation, averaging 17 mm (0.7 in) over three days, while August enjoys drier conditions with only 10 mm (0.4 in) of rainfall and no rainy days. For more details about August weather, visit Callao weather in August.
In December, the weather tends to be warmer and more humid compared to September. With minimum temperatures around 16°C (62°F) and maximums reaching up to 25°C (76°F), December averages at a comfortable 20°C (68°F). In contrast, September experiences cooler temperatures, with lows of 14°C (57°F) and highs of only 20°C (69°F), averaging at 17°C (62°F). Additionally, December sees more days of precipitation—about 3 days with a total of 17 mm (0.7 in)—while September has just 1 rainy day with 10 mm (0.4 in) of rain. The humidity also varies greatly, with December's humidity at a high 87% versus September's much lower level of 53%. For a detailed look at September weather, you can visit Callao weather in September.
In comparing the weather between December and October, December tends to be warmer, with temperatures ranging from a minimum of 16°C (62°F) to a maximum of 25°C (76°F) and an average of 20°C (68°F). October, on the other hand, has slightly cooler temperatures, with minimums of 14°C (58°F) and maximums reaching 21°C (71°F), averaging at 17°C (63°F). Precipitation is also more prevalent in December, with 17 mm (0.7 in) over 3 days, compared to October's 10 mm (0.4 in) over just 2 days. Additionally, December experiences higher humidity levels at 87%, whereas October's humidity is lower at 68%. For more details about October's climate, visit Callao weather in October.
In comparing December and November weather, December is generally warmer, with average temperatures reaching around 20°C (68°F) compared to November's 18°C (65°F). The maximum temperature in December can go up to 25°C (76°F), slightly higher than November's 23°C (74°F). Additionally, December experiences more precipitation, with 17 mm (0.7 in) over 3 days, while November sees only 9 mm (0.4 in) across 2 days. Humidity is also higher in December at 87%, compared to November's 81%. For more details, check out Callao weather in November.
As December arrives in Callao, the weather brings a refreshing change compared to the earlier months of the year. With temperatures averaging around 20°C (68°F), day's warmth peaks at a pleasant 25°C (76°F), inviting residents and visitors alike to enjoy outdoor activities. Although the month experiences a slight uptick in precipitation, with about 17 mm falling over just three days, it doesn't dampen the festive spirit. The high humidity at 87% adds a touch of moisture to the air, enhancing the vibrant tropical vibe. For a deeper dive into the annual weather patterns, check out Callao Climate.