Last updated: August 21, 2025
December in Arauco, Chile, presents a vibrant tapestry of weather characterized by warm temperatures and moderate humidity. With daytime highs reaching up to 31°C (89°F) and cooling down to an average of 16°C (62°F) at night, the month offers a pleasant escape from the winter chill. Rainfall is relatively scarce, totaling just 12 mm (0.5 in) over two days, making it an ideal time for outdoor activities and exploration. With a humidity level of 67%, the air carries a refreshing quality, perfect for enjoying the scenic coastal landscapes. Arauco in December not only invites adventure but also celebrates the warmth and beauty of the southern summer.
In December, Arauco, Chile, begins to warm up, with temperatures showing a delightful shift towards summer. The month sees a minimum temperature of around 6°C (43°F), rising to an average of 16°C (62°F) and reaching a comfortable maximum of 31°C (89°F). This progressive warmth is part of a seasonal trend where December's climate is a noticeable improvement from the brisk, cool days of winter months. The transition is evident as temperatures start to rise significantly compared to the earlier months, allowing residents and visitors alike to enjoy the beautiful landscapes in a more temperate setting. Overall, December in Arauco offers a pleasant balance of warmth, making it an ideal time for outdoor activities and festivities.
In Arauco, Chile, December brings a modest precipitation total of 12 mm (0.5 in), with rain falling over just two days of the month. This marks a slight uptick from November's 33 mm, a trend that seems to suggest a gradual shift towards the wetter months ahead, particularly as the region braces for the heavy rains characteristic of winter, which typically begin in June. While December's rainfall is relatively low compared to the peak in May and June, it fits into a seasonal pattern where precipitation gradually increases during the rainy season from late fall through early winter. The mild December rains provide a refreshing prelude to the more intense weather that follows, highlighting Arauco’s dynamic climate throughout the year.
In Arauco, Chile, December ushers in a welcome dip in humidity, falling to 67%, which is the lowest level since February. This trend marks a shift from the peak of 86% seen in July, as the year transitions from the cooler, more humid winter months to the warmer, drier summer season. While humidity levels steadily increased from 68% in January to a peak in June, the subsequent months show a gradual decline, hinting at a more comfortable climate as the year wraps up. December's modest humidity aligns with the overall progression towards a drier summer, offering a refreshing change for locals and visitors alike.
In Arauco, Chile, the UV Index reaches its peak in December, soaring to 14, which falls into the extreme exposure category. This trend highlights a consistent pattern throughout the year, where the summer months of January and February also display similarly high indices, encouraging quick burn times of only 10 minutes. As the seasons shift into autumn and winter, the UV Index begins to lower, transitioning through very high and high categories in March and April, before stabilizing at moderate levels from June to August. This annual cycle culminates again in November and December, signaling a crucial reminder to prioritize sun safety during these peak months. For a detailed look at the UV Index throughout the year, visit Arauco UV Index.
UV Risk Categories
In Arauco, Chile, December basks in an impressive 396 hours of sunshine, marking a peak in the year's daylight offerings. This surge in sunlight continues the trend of increasing daytime hours as the year progresses, with each month from September to December showcasing a steady rise. December shines brighter than its predecessors, including November's remarkable 366 hours, as summer approaches. The increase in sunlight during these final months embodies the vibrant energy of the season, contrasting starkly with the more subdued winter months, such as June with only 174 hours. This delightful trend underscores Arauco's transformation into a sun-drenched paradise, inviting locals and visitors alike to embrace the warmth and beauty of the year's end.
In Arauco, Chile, the likelihood of sunny weather in December boasts a promising 80%, making it a delightful time for outdoor activities. This positive trend follows a gradual increase from February's 82% down to April's 57%, before rebounding back up through the latter months of the year. Notably, November already sets the stage with a solid 73% chance of sunshine, hinting at a clear transition into summer. As the year wraps up, December emerges as a particularly bright month, highlighting Arauco’s appeal for sun-seekers and festive gatherings alike.
As December approaches in Arauco, Chile, daylight duration peaks at an impressive 14 hours, reminiscent of January's sunny offering. The progression of the year reveals a subtle ebb and flow of sunlight, with the longest days occurring at the start of summer. A gradual decrease from 14 hours in January to 9 hours in June marks the mid-year, before daylight begins its upward climb again. Interestingly, winter months show a stark contrast, where the days are significantly shorter, offering only 9 hours of light in both June and July. But as spring unfolds in September, daylight extends back to 11 hours, and by November, Arauco enjoys 14 hours again, setting a vibrant stage for the summer solstice and the joyous festivities that come with it.
As December arrives in Arauco, Chile, the winds begin to steady at an average speed of 3.8 m/s (8 mph), matching the gusts of the previous month. This marks a subtle but significant trend as the year progresses, showcasing a slight uptick from the earlier months, where winds dipped to their lowest in May at 2.5 m/s (6 mph). Interestingly, despite the variability throughout the year, December winds generally maintain a consistent pace that holds steady with the lively conditions of November. As the summer months approach, residents can expect these breezes to create a pleasant atmosphere, perfect for outdoor activities while hinting at the invigorating energy of the season.
Weather in Arauco varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Arauco, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January both showcase mild temperatures but exhibit notable differences in their weather patterns. In December, temperatures range from a minimum of 6°C (43°F) to a maximum of 31°C (89°F), averaging around 16°C (62°F), with a modest rainfall of 12 mm (0.5 in) over two days and a humidity level of 67%. In contrast, January tends to be warmer, with minimum temperatures around 5°C (42°F) and maximums climbing to 36°C (97°F), resulting in an average temperature of 18°C (64°F). Rainfall is slightly lower at 11 mm (0.4 in) but occurs over just one day, while humidity increases slightly to 68%. This shift in weather can be explored further in detail in the following link: Arauco weather in January.
When comparing the weather in December and February, both months exhibit relatively mild and warm conditions. December features a minimum temperature of 6°C (43°F) and can reach up to 31°C (89°F), with an average temperature of 16°C (62°F). It experiences light precipitation of 12 mm (0.5 in) over the course of 2 days. In contrast, February shows slightly warmer temperatures, with a minimum of 7°C (44°F) and a maximum of 33°C (91°F), averaging at 18°C (64°F). Precipitation decreases significantly to just 6 mm (0.2 in) over 1 day, maintaining the same humidity level of 67%. For more detailed information, you can visit Arauco weather in February.
In December, temperatures in Arauco range from a minimum of 6°C (43°F) to a maximum of 31°C (89°F), with an average temperature of 16°C (62°F). The month sees relatively low precipitation levels, with only 12 mm (0.5 in) of rain occurring over 2 days and humidity at 67%. In contrast, March experiences slightly cooler temperatures, with a minimum of 5°C (41°F), an average of 15°C (60°F), and a maximum of 29°C (85°F). However, it has higher precipitation, totaling 27 mm (1.1 in) over 3 days, and a marginally increased humidity of 70%. For a more detailed look at the weather in Arauco during March, you can check Arauco weather in March.
In December, temperatures range from a mild 6°C (43°F) at night to a warm 31°C (89°F) during the day, with an average of 16°C (62°F). The month sees relatively low precipitation, only 12 mm (0.5 in) over about 2 days, and humidity levels average around 67%. In contrast, April experiences cooler temperatures, with a minimum of 2°C (36°F) and a maximum of 27°C (81°F), averaging 13°C (55°F). This month is significantly wetter, receiving 57 mm (2.2 in) of rain over about 5 days, and has higher humidity at 74%. For more details on the weather in April, you can visit Arauco weather in April.
December and May showcase contrasting weather profiles. In December, temperatures range from a mild 6°C (43°F) at night to a warm 31°C (89°F) during the day, with an average of 16°C (62°F). The month experiences light precipitation of just 12 mm (0.5 in) over a couple of days, and humidity is relatively moderate at 67%.
In stark contrast, May presents a cooler climate, with temperatures dipping as low as -2°C (28°F) at night and averaging 10°C (51°F) during the day, peaking at a comfortable 21°C (71°F). This month encounters significantly higher rainfall, totaling 126 mm (5.0 in) across about ten days, and humidity levels rise to 83%.
For more specific details, you can visit Arauco weather in May.
December and June present vastly different weather conditions. In December, temperatures range from a minimum of 6°C (43°F) to a maximum of 31°C (89°F), with an average of 16°C (62°F). The month is relatively dry, experiencing only 12 mm (0.5 in) of precipitation over just 2 days and maintaining a moderate humidity level of 67%. In contrast, June is notably chillier, with temperatures varying from a minimum of -2°C (28°F) to a maximum of 17°C (63°F) and an average of 9°C (48°F). This month sees significantly higher precipitation, with 240 mm (9.4 in) spread across 14 days, coupled with increased humidity at 85%. For more specific details on June's weather, you can visit Arauco weather in June.
In December, the weather tends to be warmer and drier, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 31°C (89°F), and only 12 mm of precipitation spread over just 2 days. The average temperature sits comfortably at around 16°C (62°F), accompanied by a moderate humidity level of 67%. In contrast, July experiences much cooler temperatures, with a minimum of -2°C (28°F) and a maximum of 18°C (65°F). The weather is significantly wetter, receiving 140 mm of rain across 13 days and exhibiting higher humidity at 86%. For more detailed information, you can check Arauco weather in July.
December and August present contrasting weather conditions. In December, temperatures range from a pleasant minimum of 6°C (43°F) to a warm maximum of 31°C (89°F), accompanied by relatively low precipitation of just 12 mm (0.5 in) over two days, with humidity around 67%. In stark contrast, August sees colder temperatures, with a minimum of -1°C (31°F) and an average of 9°C (48°F), peaking at 20°C (69°F). This month experiences significantly higher rainfall, totaling 139 mm (5.5 in) over 11 days, coupled with higher humidity at 85%. For a deeper look at August weather specifics, you can refer to Arauco weather in August.
When comparing the weather between December and September, distinct differences stand out. December boasts a warmer climate with average temperatures ranging from a cool 16°C (62°F) to a maximum of 31°C (89°F), while September is noticeably cooler, with average temperatures peaking at 27°C (81°F) and dipping to a minimum of 0°C (33°F). Precipitation patterns also vary significantly; December sees only 12 mm (0.5 in) of rain over just 2 days, whereas September is much wetter, experiencing 89 mm (3.5 in) of rain across 8 days. Additionally, the humidity in December is slightly lower at 67%, compared to 79% in September, contributing to a more comfortable atmosphere as the year winds down. For more detailed insights on September conditions, you can visit Arauco weather in September.
When comparing the weather in December and October, notable differences emerge. December features milder temperatures, ranging from a minimum of 6°C (43°F) to a maximum of 31°C (89°F), with an average of 16°C (62°F). In contrast, October has a much wider temperature range, with lows dipping to -1°C (31°F) and highs reaching 24°C (76°F), leading to an average of 11°C (53°F). Precipitation levels also contrast significantly; December sees just 12 mm (0.5 in) of rain over two days, while October experiences 59 mm (2.3 in) of rain spread across eight days. Additionally, October has a higher humidity level at 76%, compared to December's 67%. For more insights, check out Arauco weather in October.
In December, the weather experiences a slight warming trend compared to November, with minimum temperatures rising to 6°C (43°F) and maximums reaching up to 31°C (89°F). The average temperature for December is 16°C (62°F), compared to November's average of 14°C (58°F). Additionally, December sees significantly less precipitation, totaling only 12 mm (0.5 in) over 2 days, while November has 33 mm (1.3 in) spread over 4 days. Humidity also drops slightly from November's 72% to 67% in December, making the latter month feel a bit more comfortable overall. For a detailed view of November's weather, check out Arauco weather in November.
December in Arauco brings a delightful transition into summer, characterized by warmer temperatures and lower precipitation compared to the preceding months. With maximum temperatures reaching a comfortable 31°C, the average warmth of 16°C makes outdoor activities increasingly appealing. Humidity levels hover around 67%, adding a touch of warmth to the air, while only a couple of days see any rain, resulting in just 12 mm of precipitation for the month. This distinct shift not only enhances the allure of Arauco's natural beauty but also marks a time for celebrations and outdoor gatherings. For those interested in understanding how December weather fits into the overall climate pattern, you can explore more at Arauco Climate.