December Weather in La Merced, Peru

Last updated: August 27, 2025

In December, La Merced, Peru experiences a unique blend of cool temperatures and heightened humidity, creating a distinct tropical atmosphere. With a maximum temperature reaching 15°C (59°F) and an average of 7°C (44°F), the month presents a crisp yet mild climate perfect for exploration. However, the minimum can drop to -2°C (29°F), urging visitors to dress in layers. This month is also characterized by significant precipitation, totaling 257 mm (10.1 in) over an impressive 28 days, resulting in lush greenery and vibrant landscapes. The humidity level hovers around 91%, adding a touch of moisture to the air that complements the region's rich biodiversity, making December an exceptional time to experience the natural beauty of La Merced.

December Temperature in La Merced

In December, La Merced experiences a subtle warming trend, marking the transition towards the warmer months of the year. The temperatures begin to rise, with average daily temperatures reaching around 7°C (44°F), while the maximums hit 15°C (59°F), providing a pleasant atmosphere for locals and visitors alike. The nights remain quite chilly, with lows dipping to -2°C (29°F), echoing the cooler patterns observed earlier in the year. Overall, December serves as a bridge, delivering a mix of crisp mornings and milder afternoons, making it an ideal time for outdoor exploration in this charming Peruvian locale.

December Weather in La Merced: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in La Merced, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In La Merced, December typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec434443434443434343434444
Data source: Temperature data for La Merced generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in La Merced

In December, La Merced experiences a significant precipitation of 257 mm (10.1 in), marking a continuation of the wet season that begins in earnest in the earlier months. This amount falls over approximately 28 days, making December one of the wetter months of the year, although slightly less so than the peak months of March and February. The trend shows a gradual increase in rainfall from May to December, with December’s precipitation closely resembling the January figures, not far behind. As the year wraps up, the persistent rainfall contributes to the lush, green landscape characteristic of this vibrant region, setting the stage for the lush growth that follows in the new year.

December Precipitation Trends in La Merced

The chart displays monthly precipitation patterns in La Merced, 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 La Merced, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec255288355223147716676162205189257
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in La Merced

In La Merced, Peru, December experiences a notable spike in humidity, reaching 91%, a level that mirrors the lush and vibrant atmosphere of the rainy season. This peak follows closely the high humidity levels found in both January and November, which also hover around 89%, signaling a consistent trend of moisture during the early summer months. As the year progresses, there’s a gradual decline from May's 84% to the drier conditions of July and August, where humidity dips to around 55%. However, the trend shifts back towards higher humidity levels in the latter months, highlighting a season of rejuvenation. Overall, December encapsulates the essence of tropical highland humidity, where the air is rich and invigorating, setting the stage for a lush festive season.

December Average Humidity in La Merced

This chart illustrates the average monthly humidity levels in La Merced, 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 La Merced is approximately {2}%, 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 La Merced

In December, La Merced, Peru, continues to experience a highly extreme UV Index of 18, resulting in a burn time of just 10 minutes for unprotected skin. This trend mirrors the preceding months, where the UV Index has remained consistently high, particularly from January through March, where it peaked at 19. As the year comes to a close, residents and visitors alike should remain vigilant, adopting protective measures against the intense sun exposure typical of this region. For detailed UV forecasts and safety tips, visit La Merced UV Index.

Maximum UV Index Levels in La Merced for December

The chart shows the monthly maximum UV Index (UVI) for La Merced 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 La Merced typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec191919181513141517181818
Data source: La Merced 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.

December Sunshine in La Merced

In La Merced, Peru, the month of December offers a delightful transition from the vibrant sunshine of the earlier months, with 278 hours of bright daylight. While this marks a slight decrease from the abundant sunshine enjoyed in November's 284 hours, it still encapsulates the region's overall trend of plentiful light that begins in January with 211 hours and peaks in May at 334 hours. The sun bathes La Merced in warmth, making it a perfect destination for those seeking to embrace the lush landscapes and vibrant culture during this time. As the year draws to a close, the sunlight gently wanes, yet the summer-like essence of the locale remains, inviting visitors to enjoy its unique charm.

Monthly Sunshine Duration in La Merced: December Highlighted

The December sunshine duration represents the total number of hours La Merced experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec211h239h245h295h334h324h340h340h326h318h284h278h
Data source: La Merced December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in La Merced During December

In La Merced, Peru, the likelihood of sunny weather in December presents a modest 15% chance of sunshine, which is relatively low compared to some of its neighboring months. Trends in the data reveal a gradual increase in sunny days starting from the beginning of the year, with May marking a significant jump to 35%. The summer months, notably July through September, offer the highest probabilities, indicating a seasonal peak in sunlit days. As we approach December, there’s a decline in sunny weather potential, dropping from a striking 57% in July to just 15% by the end of the year. This pattern suggests that while December may not promise bright skies, the surrounding months present a more optimistic outlook for sun seekers in La Merced.

Percentage of Sunny Days in December in La Merced

The chart illustrates the percentage of sunny days in La Merced throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often La Merced experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec7%9%8%17%35%33%57%41%33%16%10%15%
Data source: La Merced December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in La Merced in December

In La Merced, Peru, the daylight duration exhibits a captivating rhythm throughout the year. From January to March, the city enjoys a consistent 12 hours of daylight, basking in the splendor of sunlight. As the year progresses into April, daylight slightly diminishes to 11 hours, a trend that continues through the middle of the year until August. However, this seasonal ebb reverses in September, when daylight extends again to 12 hours, echoing the brightness of earlier months. With October and November maintaining this generous allowance of light, December concludes the year on a high note, once again offering 12 hours of radiant sunshine. This cyclical pattern highlights La Merced’s unique position near the equator, fostering a balance between light and shadow throughout the seasons.

Average Daylight Hours in La Merced for December

The chart illustrates the variation in daylight duration in La Merced throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec12h 36m12h 23m12h 7m11h 51m11h 39m11h 33m11h 36m11h 47m12h 2m12h 18m12h 32m12h 40m
Data source: La Merced daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in La Merced

As December settles over La Merced, the average wind speed hovers around 1.3 m/s (3 mph), reflecting a gentle breeze typical for the month. This slight uptick is consistent with the prevailing trend observed throughout the year, where wind speeds fluctuate modestly between 1.1 m/s and 1.5 m/s. Notably, the summer months, particularly July and September, bring the strongest gusts, while the winter months maintain a more tranquil ambiance. In December, the winds carry a sense of calm, perfectly complementing the festive atmosphere of the season, making it an ideal time to explore and soak in the local culture.

Average December Wind Speed in La Merced

The chart displays monthly wind speed patterns in La Merced, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec1.21.41.31.21.31.11.51.41.51.21.21.3 m/s
Data source: La Merced December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in La Merced Compares to Other Months

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

December and January experience similar weather patterns, with both months showcasing low temperatures that dip to around -2°C (29°F) and maximums reaching 15°C (59°F). However, December tends to be slightly warmer on average at 7°C (44°F) compared to January's average of 6°C (43°F). Precipitation levels are comparable as well, with December receiving 257 mm (10.1 in) over 28 days and January slightly less at 255 mm (10.0 in) over 25 days. Both months maintain high humidity levels of 91%, creating a consistently damp atmosphere. For a more detailed look into January weather, you can visit La Merced weather in January.

December and February exhibit similar temperature ranges, with both months experiencing minimum temperatures around -2°C (29°F) and maximum temperatures peaking at 15°C (59°F). However, December tends to have a slightly higher average temperature of 7°C (44°F) compared to February’s average of 6°C (44°F). Precipitation levels are notably higher in February, reaching 288 mm (11.3 in) across 27 days, compared to December's 257 mm (10.1 in) over 28 days. This results in a marginally lower humidity in February at 89%, compared to December's 91%. For a more detailed look at February weather specifics, check out La Merced weather in February.

In December, the average temperature ranges from a chilly -2°C (29°F) at its lowest to a comfortable 15°C (59°F) at its highest, with an overall average of 7°C (44°F). The month experiences significant precipitation, totaling 257 mm (10.1 in) over 28 days, coupled with high humidity at 91%.

In contrast, March shows slightly milder temperatures, with a minimum of -1°C (30°F) and a maximum of 14°C (58°F), yielding an average of 6°C (43°F). However, it is notably wetter, with precipitation levels reaching 355 mm (14.0 in) across 31 days and a marginally lower humidity of 89%.

For more details on March's weather specifics, you can refer to La Merced weather in March.

In December, the weather is characterized by a slightly warmer average temperature of 7°C (44°F) with maximums reaching up to 15°C (59°F), while April sees a marginally cooler average of 6°C (44°F) and maximums of 14°C (58°F). Both months experience freezing minimum temperatures of around -2°C (28°F to 29°F), but December has a higher precipitation total of 257 mm (10.1 in) over 28 days compared to April's 223 mm (8.8 in) over 29 days. Humidity levels are similar, with December at 91% and April at 88%, making both months feel damp but with December being notably wetter. For more details on weather patterns in April, you can check La Merced weather in April.

December and May exhibit notable differences in weather patterns. In December, temperatures range from a minimum of -2°C (29°F) to a maximum of 15°C (59°F), with an average of 7°C (44°F). This month experiences higher precipitation, totaling 257 mm (10.1 in) over 28 days, contributing to a humidity level of 91%. In contrast, May features slightly milder conditions, with temperatures ranging from a minimum of -1°C (31°F) to a maximum of 14°C (58°F) and an average also at 7°C (44°F). Precipitation during May is significantly lower at 147 mm (5.8 in) across the same number of days, resulting in reduced humidity at 84%. For those interested in more specifics about weather conditions in May, you can find additional details here: La Merced weather in May.

December and June present distinctly different weather patterns. In December, temperatures range from a minimum of -2°C (29°F) to a maximum of 15°C (59°F), with an average of 7°C (44°F). The month experiences high precipitation levels, totaling 257 mm (10.1 in) over 28 days, coupled with a humidity level of 91%, creating a damp and chilly atmosphere. In contrast, June has a similar minimum temperature of -2°C (29°F) but slightly cooler overall, with an average temperature of 6°C (44°F) and a maximum of 14°C (57°F). June sees significantly less rainfall, measuring only 71 mm (2.8 in) over 21 days, and the humidity drops to 73%, resulting in a more comfortable environment. For more details on June weather in specific locations, visit La Merced weather in June.

December and July present contrasting weather patterns. In December, temperatures range from a minimum of -2°C (29°F) to a maximum of 15°C (59°F), with an average of 7°C (44°F). This month also experiences significant precipitation, totaling 257 mm (10.1 in) over 28 days, coupled with high humidity at 91%. In contrast, July shows milder temperatures, with a minimum of -3°C (26°F) and a slightly lower maximum of 14°C (58°F), averaging around 6°C (43°F). The rainfall is much less intense, amounting to only 66 mm (2.6 in) over 19 days, and the humidity drops to 55%. For a closer look at July weather, visit La Merced weather in July.

December and August present contrasting weather conditions. In December, temperatures range from a minimum of -2°C (29°F) to a maximum of 15°C (59°F), with an average of 7°C (44°F). This month experiences significant rainfall, totaling 257 mm (10.1 in) over 28 days, contributing to a high humidity level of 91%. In contrast, August offers cooler temperatures, with a minimum of -4°C (25°F) and a maximum of 14°C (58°F), averaging around 6°C (43°F). Precipitation in August is considerably lower at 76 mm (3.0 in) over 18 days, resulting in lower humidity at 53%. For a detailed overview of weather patterns, you can visit La Merced weather in August.

In December, the weather is slightly warmer compared to September, with average temperatures reaching 7°C (44°F) during the day and maximums of 15°C (59°F), while September has an average of 6°C (44°F) and peak temperatures of 14°C (57°F). December also experiences significantly higher precipitation, totaling 257 mm (10.1 in) over 28 days, whereas September sees only 162 mm (6.4 in) with the same number of rainy days. Furthermore, humidity levels are notably higher in December at 91%, compared to 62% in September. For a more detailed look at what to expect in September, you can visit La Merced weather in September.

In December, the weather is slightly warmer compared to October, with average temperatures reaching 7°C (44°F) versus October's 6°C (43°F). Both months experience similar minimum temperatures, but December has a higher maximum temperature of 15°C (59°F) compared to October's 14°C (57°F). Precipitation is more pronounced in December, with 257 mm (10.1 in) over 28 days, surpassing October's 205 mm (8.1 in) spread across 29 days. Additionally, humidity levels rise in December to 91%, compared to 82% in October, making the months feel quite different despite their similarities. For more detailed information about October weather, you can check La Merced weather in October.

In comparing the weather conditions of November and December, we see a slight drop in the minimum temperatures, with December reaching a low of -2°C (29°F) compared to November's -1°C (30°F). Both months feature an average temperature of around 7°C (44°F), but December experiences marginally higher maximum temperatures with a peak of 15°C (59°F) versus November's 14°C (58°F). Notably, December brings increased precipitation, with 257 mm (10.1 in) of rainfall over 28 days, compared to November's 189 mm (7.5 in) across 27 days. The humidity also rises slightly in December to 91%, up from November's 89%. For more detailed information about November weather in La Merced, you can refer to La Merced weather in November.

Compare La Merced's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in La Merced

December in La Merced brings a notable shift in weather patterns as the temperatures dip to a maximum of 15°C and an average of 7°C, far cooler than the summer months that precede it. This month also experiences higher precipitation, with an impressive 257 mm falling across 28 days, creating a humid atmosphere at 91% that many will find refreshing yet challenging. The transition to winter makes December distinct, inviting visitors to experience the serene beauty that only this time of year can offer. For more insights into La Merced's overall weather patterns, explore La Merced Climate.