December Weather in Alto Mayo, Peru

Last updated: August 27, 2025

In December, Alto Mayo, Peru experiences a warm and humid climate, with temperatures ranging from a minimum of 13°C (55°F) to a maximum of 27°C (81°F) and an average of 19°C (67°F). This month is characterized by substantial rainfall, totaling 281 mm (11.1 in) over 30 days, making it one of the wettest periods of the year. With an 85% humidity level, visitors should be prepared for a lush and vibrant environment, highlighting the region's rich biodiversity amidst the frequent showers.

December Temperature in Alto Mayo

In December, Alto Mayo, Peru, experiences a delightful climate that marks the transition into the warmer summer months. With minimum temperatures around 13°C (55°F) and maximums reaching 27°C (81°F), the region maintains a mild yet comfortable average of 19°C (67°F). Notably, December's temperatures mirror those of the preceding months, showcasing a consistent and inviting warmth throughout the year. As the rainy season looms, the pleasant temperatures make it an ideal time for visitors to explore the lush landscapes and vibrant biodiversity that characterizes this enchanting region. Whether you’re birdwatching or hiking, the balmy December days promise the perfect backdrop for unforgettable adventures in nature.

December Weather in Alto Mayo: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Alto Mayo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alto Mayo, 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).
JanFebMarAprMayJunJulAugSepOctNovDec666666666665646465666767
Data source: Temperature data for Alto Mayo 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 Alto Mayo

In December, the Alto Mayo region experiences a significant uptick in rainfall, with a precipitation total of 281 mm (11.1 in), creating a lush backdrop for the festive season. This month typically sees about 30 days of rain, reflecting a pattern of consistent moisture that builds throughout the year, especially following the wetter months of October and November. Compared to the drier spell in the latter half of the year, such as July and August with their minimal precipitation, December marks a return to the rainy season's peak. This trend emphasizes the region's rich biodiversity and the importance of these wet months for agriculture and the ecosystem as nature recharges in preparation for the upcoming year.

December Precipitation Trends in Alto Mayo

The chart displays monthly precipitation patterns in Alto Mayo, 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 Alto Mayo, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec291247352257188134916989195268281
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Alto Mayo

December in Alto Mayo, Peru, showcases a notable rise in humidity, reaching 85%, which closely mirrors the preceding months of March and April. Following the sharp decline in humidity during the mid-year months of July and August—where levels dipped significantly to 51% and 44%—the latter part of the year witnesses a gradual increase. The return toward higher humidity levels is indicative of the region's climatic rhythm, transitioning into the wet season. As the year closes, December's humidity reflects the lush, verdant landscapes typical of the rainforests, setting the stage for vibrant biodiversity and rich ecological experiences in the area.

December Average Humidity in Alto Mayo

This chart illustrates the average monthly humidity levels in Alto Mayo, 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 Alto Mayo is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%85%87%88%73%51%44%49%71%77%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Alto Mayo

In Alto Mayo, Peru, December marks a continuation of the extreme UV Index trend observed throughout the year, with a value of 15, indicating a consistent risk of harm from unprotected sun exposure. The burn time remains a swift 10 minutes, reminiscent of the heights reached earlier in the year, particularly from January to March, when the UV Index peaked at 18. After peaking in the earlier months, a slight decline is evident as the region transitions into December, yet caution is still paramount. This persistent level of UV radiation emphasizes the importance of sun safety throughout the year. For more detailed information, visit the Alto Mayo UV Index.

Maximum UV Index Levels in Alto Mayo for December

The chart shows the monthly maximum UV Index (UVI) for Alto Mayo 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 Alto Mayo typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec161718171412121315161515
Data source: Alto Mayo 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 Alto Mayo

In Alto Mayo, Peru, the month of December shines brightly with approximately 288 hours of sunshine, contributing to a significant trend of increasing daylight as the year progresses. As summer approaches, the region experiences a steady rise in sunlight hours, peaking in the mid-year months. July and August stand out with 313 and 324 hours respectively, showcasing the height of the sun's embrace. This sunny pattern begins its ascent in May with 293 hours, allowing residents and visitors alike to soak in the warmth and vibrancy of the lush landscape. As we transition from the shorter days of winter to the longer, sun-soaked days of summer, December offers a perfect blend of warmth and brightness, setting the stage for the tropical splendor that lies ahead.

Monthly Sunshine Duration in Alto Mayo: December Highlighted

The December sunshine duration represents the total number of hours Alto Mayo 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.
JanFebMarAprMayJunJulAugSepOctNovDec210h249h244h256h293h287h313h324h312h284h252h288h
Data source: Alto Mayo December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Alto Mayo During December

In Alto Mayo, Peru, the likelihood of sunshine in December is relatively modest at 15%, slightly higher than November's 11% but still lower than other months like May and July, which enjoy significantly brighter days. As the year progresses, a notable trend emerges: the likelihood of sunny weather peaks during the mid-year months, particularly in July at 49%. This suggests a shift from the predominantly cloudier conditions earlier in the year, with a gradual increase in sun exposure from May onward. While December does offer a slight respite from the gloom of previous months, it remains one of the cloudier periods of the year, hinting at the lush, vibrant environment that typically characterizes this region.

Percentage of Sunny Days in December in Alto Mayo

The chart illustrates the percentage of sunny days in Alto Mayo 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 Alto Mayo experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec14%10%8%16%37%30%49%40%35%20%11%15%
Data source: Alto Mayo December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Alto Mayo in December

In Alto Mayo, Peru, the daylight duration exhibits an intriguing pattern throughout the year. From January to March, residents enjoy an uninterrupted 12 hours of daylight, basking in the warmth of the sun. As the year progresses into April, daylight begins to wane slightly to 11 hours, maintaining this duration through the winter months of May to August. This prolonged twilight period gives way to a gradual return to longer days in September, showcasing 12 hours of daylight once again. With October and November mirroring this length, December closes the year on a bright note, reinforcing the trend of stable daylight that characterizes this lush region. The consistent rhythm of light and dark shapes the vibrant ecosystem in Alto Mayo, offering a unique experience across seasons.

Average Daylight Hours in Alto Mayo for December

The chart illustrates the variation in daylight duration in Alto Mayo throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec12h 24m12h 16m12h 6m11h 57m11h 50m11h 46m11h 48m11h 54m12h 3m12h 13m12h 22m12h 26m
Data source: Alto Mayo daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Alto Mayo

As December arrives in Alto Mayo, Peru, the average wind speed reaches 1.4 m/s (3 mph), reflecting a slight upward trend from the previous months. Since the start of the year, wind speeds have remained fairly consistent, hovering between 1.1 to 1.4 m/s, with most months settling around the 3 mph mark. Notably, the latter half of the year, particularly November and December, shows a gentle increase, hinting at a subtle seasonal shift. This steady, mild breeze carries the essence of the region's lush landscape, creating a serene backdrop for both locals and visitors alike.

Average December Wind Speed in Alto Mayo

The chart displays monthly wind speed patterns in Alto Mayo, 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.
JanFebMarAprMayJunJulAugSepOctNovDec1.31.31.11.11.21.11.31.41.31.21.41.4 m/s
Data source: Alto Mayo December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Alto Mayo Compares to Other Months

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

December and January share similar temperature trends, with both months featuring a minimum temperature of 13°C (55°F) and an average of around 19°C (66-67°F). However, January slightly edges out December in maximum temperatures, reaching up to 28°C (83°F) compared to December's 27°C (81°F). Precipitation is also notable in both months, with December experiencing 281 mm (11.1 in) over 30 days, while January sees a slight increase to 291 mm (11.5 in) spread over 25 days. Humidity levels are quite comparable, with December at 85% and January at 82%. For more information, you can check out Alto Mayo weather in January.

In comparing the weather of December and February, we see that both months feature similar temperature ranges, with December experiencing a minimum of 13°C (55°F) and a maximum of 27°C (81°F), while February has a slightly lower minimum of 12°C (54°F). The average temperature remains consistent at 19°C (67°F) for both months. However, December is notably wetter, receiving 281 mm (11.1 in) of precipitation over 30 days, compared to February's 247 mm (9.7 in) across 27 days. Humidity levels are also slightly higher in December at 85%, compared to 80% in February. For more detailed information, visit Alto Mayo weather in February.

In December, the weather typically features a minimum temperature of 13°C (55°F) and an average of 19°C (67°F), reaching a maximum of 27°C (81°F). This month experiences significant rainfall, with a total precipitation of 281 mm (11.1 in) spread across 30 days and a humidity level of 85%. In comparison, March maintains a similar temperature range with a minimum of 13°C (55°F), an average of 19°C (66°F), and a maximum of 27°C (80°F). However, it sees even more rainfall, with precipitation totaling 352 mm (13.9 in) over 31 days, while humidity remains consistently high at 85%. Thus, both months are warm and humid, but March is notably wetter. For more detailed information on the weather in March, visit Alto Mayo weather in March.

In comparing the weather between December and April, both months exhibit similar temperature ranges, with minimum temperatures around 13°C (55°F), average temperatures close to 19°C (67°F), and maximums reaching 27°C (81°F). However, December experiences slightly higher precipitation, totaling 281 mm (11.1 in) over 30 days, compared to April's 257 mm (10.1 in) over 29 days. Additionally, April tends to have marginally higher humidity at 87%, while December's humidity is recorded at 85%. For a more detailed look at the weather in April, you can check Alto Mayo weather in April.

When comparing the weather in December and May, both months exhibit similar average temperatures, ranging from a minimum of 12°C (53°F) to a maximum of 27°C (81°F). However, December tends to be wetter, with a significant 281 mm (11.1 in) of precipitation over 30 days, compared to May's lighter rainfall of 188 mm (7.4 in) over 29 days. Humidity levels are slightly higher in May at 88%, compared to December's 85%, resulting in a moist atmosphere throughout both months. For more detailed insights on May weather, you can explore Alto Mayo weather in May.

When comparing December and June weather, December tends to be warmer, with an average temperature of 19°C (67°F) and maximums reaching 27°C (81°F), while June exhibits slightly cooler conditions with an average of 18°C (65°F) and maximums of 26°C (79°F). Additionally, December experiences significantly higher precipitation, totaling 281 mm (11.1 in) over 30 days, compared to June's 134 mm (5.3 in) over 24 days. The humidity also reflects this difference, with December averaging 85% while June sits at a lower 73%. For more detailed weather insights, check out Alto Mayo weather in June.

In December, the weather tends to be warmer and more humid compared to July. With average temperatures ranging from a minimum of 13°C (55°F) to a maximum of 27°C (81°F), December experiences higher humidity at 85%. However, it also has significantly more rainfall, averaging 281 mm (11.1 in) over 30 days. In contrast, July's temperatures are slightly cooler, with a range of 10°C (50°F) to 26°C (79°F) and much lower humidity at 51%. Rainfall in July is also less intense, totaling around 91 mm (3.6 in) over 20 days. For more information on July weather, you can refer to Alto Mayo weather in July.

December and August present contrasting weather conditions. In December, temperatures range from a minimum of 13°C (55°F) to a maximum of 27°C (81°F), with an average of 19°C (67°F). The month is notably wet, featuring a substantial 281 mm (11.1 in) of precipitation over 30 days, accompanied by high humidity levels at 85%. Conversely, August offers cooler temperatures with a minimum of 9°C (49°F) and a high of 28°C (83°F), averaging at 18°C (65°F). This month sees significantly less rainfall, totaling just 69 mm (2.7 in) over 16 days, and lower humidity at 44%. For more details on August weather, you can check Alto Mayo weather in August.

In comparing the weather between December and September, one can note some significant differences. December experiences a warmer temperature range with a minimum of 13°C (55°F) and a maximum of 27°C (81°F), while September has slightly cooler temperatures, starting at a minimum of 10°C (51°F) and peaking at 28°C (83°F). Notably, December is marked by much higher precipitation, totaling 281 mm (11.1 in) over 30 days, compared to September's 89 mm (3.5 in) across 20 days. Additionally, December's humidity level is considerably higher at 85%, whereas September enjoys a more comfortable 49%. For more detailed insights into the weather patterns for September, you can check out Alto Mayo weather in September.

In comparing the weather of December and October, both months exhibit similar average temperatures, hovering around 19°C (67°F), yet December sees slightly warmer maximum temperatures, averaging 27°C (81°F) compared to October's 28°C (82°F). However, December experiences significantly higher rainfall, with 281 mm (11.1 in) over 30 days, contrasted with October's 195 mm (7.7 in) over 29 days. Furthermore, December has a much higher humidity level of 85%, making the atmosphere feel more humid compared to October's 71%. For more details on October's weather in this region, you can refer to Alto Mayo weather in October.

When comparing the weather in December and November, we see that temperatures remain quite similar, with both months averaging around 19°C (67°F) and maximums reaching 27°C (81°F). However, December experiences slightly higher minimum temperatures, at 13°C (55°F), compared to November's 12°C (54°F). Precipitation in December is more intense, totaling 281 mm (11.1 in) over 30 days, whereas November records 268 mm (10.5 in) over 29 days. Additionally, December's humidity is higher at 85%, compared to November's 77%. For more detailed insights, you can check out Alto Mayo weather in November.

Compare Alto Mayo's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Alto Mayo

In December, Alto Mayo transforms into a vibrant, lush paradise as the region experiences its wettest month, marked by high humidity levels. The daily temperatures play a warm symphony, peaking around 27°C, but the significant precipitation—a staggering 281 mm over the entire month—creates a refreshing contrast. This copious rainfall, falling throughout all 30 days, gives December a unique character, setting it apart from other months that typically showcase drier conditions. If you're curious about the broader trends and nuances of this enchanting region's weather, explore Alto Mayo Climate for more insights.