Last updated: August 21, 2025
Santiago, Chile in December offers a warm and inviting climate, perfect for outdoor activities and exploration. With maximum temperatures reaching up to 35°C (96°F) and an average of 21°C (70°F), residents and visitors alike can enjoy the sun-drenched days. The weather is typically dry, with only 3 mm (0.1 in) of precipitation and no rainy days, allowing for uninterrupted enjoyment of the picturesque landscapes. Additionally, the humidity sits at a comfortable 39%, contributing to a pleasant summer atmosphere. Overall, December is a prime time to experience the vibrant culture and stunning scenery of Santiago.
In December, Santiago, Chile, begins to embrace the warmth of summer, with temperatures showcasing a delightful range. The month kicks off with minimums of 10°C (50°F), rising to an average of 21°C (70°F), and peaking at maximums of 35°C (96°F). This gradual rise from the cooler months of November signals a clear shift towards hotter days, making it an ideal time for outdoor adventures and enjoying the city's vibrant energy. With the temperature often reaching heights reminiscent of early summer, visitors and locals alike flock to parks and plazas, enriched by the sunny disposition that December brings.
December in Santiago, Chile, marks the beginning of summer with an exceptionally dry spell, recording a mere 3 mm (0.1 in) of precipitation and 0 days of rain. This trend of limited rainfall continues from the previous months, aligning with the city’s overall dry climate during the southern hemisphere's summer season. Following November's slight uptick in moisture, December’s dry conditions signify a return to the norm, characterized by warm, sunny days that dominate the weather. As the year draws to a close, Santiago residents can expect to enjoy clear skies, reflecting a significant drop in precipitation compared to the rainier months earlier in the year.
In Santiago, Chile, December marks a notable drop in humidity, with levels reaching a refreshing 39%. This decline signifies the transition into the warm summer months, following a gradual increase from a modest 41% in January and February, peaking at 75% in July. Interestingly, the humidity levels tend to rise steadily throughout the late autumn months, culminating in a 52% reading in November before falling again in December. This pattern highlights Santiago's distinct seasonal shifts, providing residents and visitors alike with a drier, more comfortable atmosphere as the summer heat begins to set in.
In December, Santiago, Chile, experiences a very high UV Index of 14, placing it in the extreme exposure category with a quick burn time of just 10 minutes. This peak in UV radiation mirrors a seasonal trend where both January and February also reach similar extremes, highlighting a pattern of intense sun exposure during the austral summer. As the year progresses, the UV Index begins to decline in March and April, transitioning from extreme levels to high and eventually moderate through the latter months. For those enjoying the summer sun, it's essential to stay protected—understanding these trends is key to safeguarding your skin and ensuring a fun and safe outdoor experience. For more insights, visit Santiago UV Index.
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As December arrives in Santiago, Chile, the city basks in a remarkable 409 hours of sunshine, the highest of the year. This sun-drenched month marks a vibrant end to the warm season, where daylight increasingly bathes the landscape, setting the stage for abundant outdoor activities and festive celebrations. Notably, the trend showcases a gradual increase in sunshine hours from January's 326 hours, peaking in December, which reflects the region's transition to summer. With daylight dwindling in the cooler months, June records just 210 hours, making December's luminosity all the more striking. This pattern not only enhances the allure of Santiago as a summer destination but also invites locals and tourists alike to soak up the sun before the season turns.
In December, Santiago, Chile, enjoys a remarkable 89% chance of sunny weather, marking it as one of the sunniest months of the year. As the year progresses from January's already high 84% to December's peak, the city consistently welcomes abundant sunshine, especially notable in the spring and early summer months. This trend suggests a gradual increase in sunny days as the seasons shift, creating a perfect backdrop for outdoor activities and celebrations. With December's promising forecast, it's an ideal time to soak up the sun and embrace the vibrant energy of the city.
In Santiago, Chile, December ushers in 14 hours of daylight, reflecting the peak of summer and offering residents ample time to bask in the sun's warm embrace. This enduring brightness follows a gradual decline from January's high of 14 hours, dipping to 13 hours in February, and continuing to shorten as autumn approaches. By March, daylight reduces to 12 hours, transitioning into the cooler months with 11 hours in April and just 10 hours through May. The seasonal cycle resumes with a slight rebound in July and August, stabilizing around 10 hours before gradually increasing again towards spring and summer. Thus, December not only stands as a festive highlight in the calendar but also marks a peak in the daylight journey, as the city thrives under long, sunlit days.
As December rolls into Santiago, Chile, the winds begin to pick up ever so slightly, with an average speed of 2.0 m/s (5 mph)—the highest of the year. This gentle breeze contrasts with the calmer conditions of the preceding months, where wind speeds gradually decreased from a modest 1.9 m/s in January to 1.4 m/s by May. Notably, the winds remain relatively consistent throughout the cooler months, averaging around 1.5 m/s from June to August, before a subtle resurgence occurs in the late spring and early fall, reaching 1.8 m/s in November. December's uptick not only marks the transition into summer but also heralds a season full of warmth and vibrant activity, inviting locals and visitors alike to embrace the refreshing air of the city's festive atmosphere.
Weather in Santiago varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Santiago, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather is warm with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 35°C (96°F), averaging around 21°C (70°F). The month is quite dry, receiving only 3 mm (0.1 in) of precipitation and maintaining a humidity level of 39%. In contrast, January sees slightly higher temperatures, with a minimum of 11°C (52°F) and a maximum of 36°C (97°F), averaging 22°C (72°F). January also experiences a bit more precipitation at 7 mm (0.3 in) and a slight increase in humidity, rising to 41%. For more details, you can check Santiago weather in January.
In comparing the weather between December and February, both months showcase warm temperatures, with December having slightly higher maximum temperatures at 35°C (96°F) compared to February's 34°C (94°F). The average temperature remains quite consistent, averaging 21°C (70°F) in December and 21°C (71°F) in February. While December experiences minimal precipitation at only 3 mm (0.1 in), February sees a slight increase to 6 mm (0.2 in). Humidity levels are also marginally higher in February at 41% compared to December's 39%. For more detailed information, you can visit Santiago weather in February.
In December, the weather is warm with an average temperature around 21°C (70°F) and maximum highs reaching 35°C (96°F). Humidity levels are relatively low at 39%, and there’s virtually no precipitation, making it a dry month. In contrast, March experiences slightly cooler temperatures, with an average of 20°C (68°F) and maximums of 34°C (93°F). However, humidity increases to 46%, and there is a small amount of rain, averaging 4 mm over one day. For more detailed information, you can refer to Santiago weather in March.
December weather is characterized by significantly warmer temperatures, with averages around 21°C (70°F) and highs reaching up to 35°C (96°F), while April experiences cooler conditions, with average temperatures of 16°C (62°F) and maximums of 32°C (91°F). Precipitation is minimal in December, with no recorded rainy days, resulting in a low humidity level of 39%. In contrast, April sees a moderate increase in precipitation at 12 mm (0.5 in) over two days and a higher humidity level of 52%. For more detailed information about the April climate, you can visit Santiago weather in April.
December weather in Santiago is characterized by warmer temperatures, with a minimum of 10°C (50°F) and a maximum reaching up to 35°C (96°F), creating a pleasant atmosphere for outdoor activities. In contrast, May sees much cooler temperatures, with lows dropping to 0°C (32°F) and an average of 13°C (56°F) throughout the month. Additionally, May experiences significantly more precipitation, with 49 mm (1.9 in) over five days, compared to December's dry conditions with no recorded rain. The humidity is also notably higher in May at 64%, while December maintains a lower humidity level of 39%. For detailed information, you can check Santiago weather in May.
December and June present strikingly different weather patterns. In December, temperatures are quite warm, ranging from a minimum of 10°C (50°F) to a maximum of 35°C (96°F), with minimal precipitation and low humidity at 39%. This results in generally dry and sunny conditions, making it ideal for outdoor activities. In stark contrast, June brings much cooler weather, with temperatures dipping to a minimum of -3°C (26°F) and an average of 9°C (49°F), peaking at 23°C (73°F). Additionally, June experiences substantial precipitation, averaging 99 mm (3.9 in) over about 8 days and a higher humidity level of 71%. These conditions create a more overcast and wet atmosphere. For more details on June weather in Santiago, visit Santiago weather in June.
December and July present strikingly different weather patterns. In December, temperatures range from a minimum of 10°C (50°F) to a maximum of 35°C (96°F), with an average of 21°C (70°F). The month typically sees minimal precipitation, only about 3 mm (0.1 in), and boasts low humidity at 39%, offering mostly dry and warm conditions ideal for outdoor activities. Conversely, July brings much cooler temperatures, with a minimum of -3°C (26°F) and a maximum of 24°C (75°F), averaging around 9°C (49°F). This winter month experiences significantly more precipitation, totaling 62 mm (2.4 in) over about five days, and the humidity is much higher at 75%. For a more detailed look at Santiago's weather during this time, check out Santiago weather in July.
When comparing the weather in December and August, significant differences emerge. In December, temperatures range from a mild 10°C (50°F) at night to a scorching 35°C (96°F) during the day, with an average of 21°C (70°F). The month is characterized by very little precipitation, recording only 3 mm (0.1 in) and experiencing no rainy days, resulting in low humidity levels of 39%.
In contrast, August presents a much cooler climate, with temperatures dipping as low as -2°C (29°F) at night and reaching a maximum of 26°C (79°F), averaging 11°C (51°F). August is also considerably wetter, with 56 mm (2.2 in) of rain spread over 7 days, contributing to higher humidity levels at 73%.
For more detailed information on the weather during this month, you can check Santiago weather in August.
December weather is characterized by warmer temperatures, with minimums of 10°C (50°F) and maximums reaching up to 35°C (96°F), making it a much hotter month on average compared to September, which sees minimums of -2°C (30°F) and maximums of 31°C (88°F). While December enjoys very little precipitation, averaging only 3 mm with no rainy days, September is quite the opposite, experiencing 41 mm of rainfall over 8 days. Additionally, humidity levels in December are lower at 39%, compared to September's 56%, creating a more comfortable and dry experience in the final month of the year. For a detailed look at September’s weather, you can visit Santiago weather in September.
December weather is notably warmer than October, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 35°C (96°F), while October features a cooler range, with temperatures between 3°C (37°F) and 32°C (90°F). Additionally, December experiences lower humidity at 39% compared to October's 61%, contributing to a more comfortable atmosphere during the day. Precipitation also differs significantly; December records virtually no rain with only 3 mm (0.1 in) over the entire month, while October sees a total of 36 mm (1.4 in) spread across 5 days. For more details on October's weather in Santiago, check out Santiago weather in October.
In December, the weather in Santiago showcases a notable warmth compared to November, with minimum temperatures rising to 10°C (50°F) and average highs reaching 35°C (96°F). While November experiences slightly cooler conditions with a minimum of 6°C (44°F) and an average maximum of 34°C (93°F), it also sees higher humidity levels at 52% compared to December's drier 39%. Additionally, December boasts minimal precipitation, with no rainy days recorded, in stark contrast to November's 8 mm of rain over two days. For a detailed look at November's climate, check out Santiago weather in November.
December in Santiago marks a delightful departure from the cooler months, as warmer temperatures usher in the summer season. With an average temperature of 21°C, the city enjoys plenty of sunshine and minimal precipitation—boasting zero rainy days throughout the month. The humidity remains relatively low at 39%, making the warmth feel enjoyable rather than oppressive. This dry and sunny weather sets the perfect stage for outdoor activities and exploring the vibrant city. For a comprehensive overview of Santiago’s climate throughout the year, visit Santiago Climate.