Last updated: August 21, 2025
In San Martin de los Andes, Argentina, December ushers in a pleasant summer ambiance characterized by maximum temperatures reaching 28°C (83°F). With an average temperature of 12°C (53°F) and a low dipping to -2°C (29°F), the weather offers a delightful range for outdoor enthusiasts. Although the month experiences about 48 mm (1.9 in) of rainfall over seven days, the high humidity at 73% adds a touch of freshness to the warm days. Whether you're hiking through stunning landscapes or enjoying the vibrant local culture, December's diverse weather makes it an ideal time to explore this picturesque destination.
In December in San Martín de los Andes, temperatures begin to warm up as summer approaches. With minimums around -2°C (29°F), the chill of early winter starts to fade, giving way to a more moderate average temperature of 12°C (53°F). This pleasant climate peaks with daytime highs reaching up to 28°C (83°F), enticing both locals and visitors to explore the breathtaking landscapes. As the month unfolds, the notable shift from harsh winter conditions to a milder atmosphere sets the stage for outdoor adventures, making December a fantastic time to experience this stunning region of Argentina.
December in San Martin de los Andes ushers in the summer season with a modest precipitation total of 48 mm (1.9 in), reflecting a gradual decrease from the heavier rains of June and July, which are typically the wettest months of the year. The rainfall occurs over 7 days, lending a touch of refreshment to the landscape while still allowing ample time for outdoor adventures. As the year winds down, the dry spell of the previous months, particularly November, is clearly evident, suggesting a shift towards drier conditions. Overall, December’s precipitation marks a balance between the lush, vibrant greenery of late spring and the drier, sunnier days that often characterize the cusp of summer in this enchanting Argentinian locale.
In December, humidity in San Martin de los Andes remains relatively moderate at 73%, showing a slight decrease from the higher levels observed in the preceding months. This shift marks a transition from the particularly humid winter months of July and August, which both peak at an impressive 90%. As the year winds down, the humidity gradually tapers off from the peak autumn levels of 88% seen in May and June. This trend suggests that while December carries a touch of summer, the atmosphere retains a refreshing moisture, making the scenic landscapes of San Martin de los Andes lush and vibrant during this time of year.
In December, San Martin de los Andes experiences a notably high UV Index of 14, falling into the extreme exposure category. With a burn time of just 10 minutes, it serves as a reminder of the sun's intensity during the Southern Hemisphere's summer peak. This trend of escalating UV levels is typical as the year progresses, starting from a very high index in March to the extreme levels witnessed in late spring and early summer. The data highlights the importance of sun protection, especially during these months when exposure can be particularly damaging. For more details, check out San Martin de los Andes UV Index.
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In San Martin de los Andes, December heralds the arrival of abundant sunshine, boasting 384 hours of glorious daylight—making it the sunniest month of the year. This bright start to summer contrasts sharply with the dimmer days of the preceding months; for instance, June and July see a mere 143 and 170 hours respectively. As the year progresses, the daylight hours steadily climb from the low of 211 hours in May, culminating in a peak that not only encapsulates the essence of summer but also encourages outdoor activities and exploration. The transition to a sunnier December showcases a vibrant shift that enhances the natural beauty of the Andes and beckons both locals and travelers to bask in the warmth and splendor of this enchanting region.
As December approaches in San Martin de los Andes, Argentina, the likelihood of sunny weather significantly increases, boasting a striking 72% chance of sunshine. This marks a noticeable rise compared to the months preceding it, where the chances fluctuate between 23% and 60% from June to March. The sunny breakout in December aligns with the onset of the summer season, creating a vibrant atmosphere perfect for outdoor activities. Following the upward trend, this month serves as a strong precursor to January and February, which maintain robust sunlight percentages of 64% and 71%, respectively. Such conditions not only enhance the allure of this picturesque destination but also offer a delightful respite from the cooler, cloudier months.
In San Martin de los Andes, Argentina, the daylight duration reveals a captivating seasonal rhythm. December shines brightly with 14 hours of daylight, mirroring the peak light of January and November. As the year progresses from these summer months, there’s a gradual decline, with daylight decreasing to 12 hours in March before sharply dropping to 9 hours from May through July. However, as winter wanes, daylight begins its ascent again, reaching 10 hours in August and gradually increasing until it peaks once more at 14 hours in late spring. This cyclical pattern beautifully showcases the region's transition through vibrant summer days and serene winter nights, inviting exploration and discovery throughout the year.
As December ushers in the summer season in San Martin de los Andes, the average wind speed settles at 2.6 m/s (6 mph), a slight decrease from the more blustery October and November months. This gentle breeze contrasts with the stronger gusts earlier in spring, creating a harmonious balance that enhances the region’s stunning landscapes. The steady winds throughout the year, peaking at 3.0 m/s (7 mph) in October, reveal a mild trend, favorable for outdoor activities and exploration. December's calm conditions invite locals and travelers alike to immerse themselves in the natural beauty, with the stillness of the air perfectly complementing the breathtaking summer scenery.
Weather in San Martin de los Andes varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Martin de los Andes, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January exhibit similar overall trends in weather, yet they manifest distinct characteristics. In December, temperatures range from a chilly minimum of -2°C (29°F) to a warm maximum of 28°C (83°F), with an average of 12°C (53°F). The month sees moderate precipitation of 48 mm (1.9 in) over about seven days, and humidity averages around 73%. In contrast, January is slightly cooler with temperatures dipping to a minimum of -4°C (25°F) and peaking at 32°C (89°F), while the average stands at 13°C (55°F). Precipitation is less frequent, totaling 28 mm (1.1 in) over just four days, and humidity is slightly lower at 70%. For more insights into the weather during this month, check out San Martin de los Andes weather in January.
In comparing the weather between December and February, December experiences a broader temperature range with minimums reaching -2°C (29°F) and maximums peaking at 28°C (83°F), while February sees slightly cooler minimums of -3°C (27°F) and higher maximums of 31°C (88°F). Despite February being generally warmer, it has lower average precipitation at 28 mm (1.1 in) over 5 rainy days compared to December’s 48 mm (1.9 in) over 7 days. Additionally, February exhibits a touch lower humidity at 69% compared to December’s 73%. For more detailed information on February weather in this region, you can visit San Martin de los Andes weather in February.
December and March in San Martin de los Andes offer relatively mild temperatures, but with slight variations. In December, temperatures range from a minimum of -2°C (29°F) to a maximum of 28°C (83°F), with an average of 12°C (53°F). In contrast, March experiences cooler conditions, with temperatures dipping to a minimum of -6°C (22°F) and averaging 10°C (51°F), while still reaching up to 28°C (83°F). Precipitation levels are similar in both months, with December receiving 48 mm (1.9 in) over 7 days and March slightly less at 46 mm (1.8 in) over 6 days. Humidity remains constant at 73%, contributing to a similar feel between the two months. For more detailed information about March weather, be sure to check San Martin de los Andes weather in March.
December and April present distinct weather patterns in San Martin de los Andes. In December, temperatures range from a minimum of -2°C (29°F) to a maximum of 28°C (83°F), with an average of 12°C (53°F). The month experiences 48 mm (1.9 in) of precipitation over 7 days, coupled with a humidity of 73%. In contrast, April brings cooler temperatures, with a minimum of -7°C (20°F) and a maximum of 23°C (74°F), averaging around 7°C (45°F). This month isalso slightly wetter, with 64 mm (2.5 in) of precipitation across 9 days, and a higher humidity level of 82%. For more detailed information, you can check out San Martin de los Andes weather in April.
When comparing the weather in December and May, notable differences emerge. December typically experiences a broader temperature range, with minimums around -2°C (29°F) and maximums reaching up to 28°C (83°F). In contrast, May sees cooler conditions, with temperatures dropping to a minimum of -16°C (4°F) and a maximum of only 20°C (68°F). Precipitation also varies between the two months; December averages 48 mm (1.9 in) over 7 days, while May sees a significant increase, with 105 mm (4.1 in) spread across 13 days. Humidity levels are also higher in May, averaging 88% compared to December's 73%. For more detailed insights, you can check San Martin de los Andes weather in May.
December and June present contrasting weather patterns. In December, temperatures range from a minimum of -2°C (29°F) to a pleasant maximum of 28°C (83°F), with an average of 12°C (53°F). Precipitation is relatively low at 48 mm (1.9 in) over 7 days, and humidity sits at a comfortable 73%. In stark contrast, June is much cooler, with a range from a minimum of -11°C (13°F) to a maximum of just 9°C (48°F) and an average temperature of 0°C (33°F). This month experiences significantly higher precipitation at 228 mm (9.0 in) across 19 days, accompanied by increased humidity of 88%. For more details, you can visit San Martin de los Andes weather in June.
When comparing the weather between December and July, there are notable differences in temperature and precipitation. December boasts milder temperatures, with a minimum of -2°C (29°F) and an average of 12°C (53°F), reaching a maximum of 28°C (83°F). In contrast, July experiences colder conditions, with temperatures ranging from a minimum of -14°C (7°F) to a maximum of just 11°C (51°F) and an average of 0°C (32°F). Moreover, July sees significantly higher precipitation levels, totaling 198 mm (7.8 in) over 16 days, compared to December's 48 mm (1.9 in) over just 7 days. The humidity is also greater in July at 90%, versus 73% in December. For a more detailed overview, you can check out the San Martin de los Andes weather in July.
In December, the weather features milder temperatures with a minimum of -2°C (29°F) and an average of 12°C (53°F), peaking at a comfortable 28°C (83°F). The month experiences moderate precipitation of 48 mm (1.9 in) over about 7 days, along with a humidity level of 73%, creating a pleasant atmosphere for outdoor activities.
In contrast, August sees much colder conditions with temperatures ranging from a minimum of -10°C (15°F) to a maximum of only 12°C (54°F), and an average of just 1°C (33°F). This month is considerably wetter, with precipitation totaling 168 mm (6.6 in) across 16 days, and humidity levels rising to 90%, resulting in a damp and chilly environment. For further insights, you can check San Martin de los Andes weather in August.
Comparing the weather in December and September reveals significant differences in temperature and precipitation patterns. In December, temperatures range from a minimum of -2°C (29°F) to a comfortable average of 12°C (53°F), peaking at a maximum of 28°C (83°F). In contrast, September is much cooler, with temperatures dipping as low as -10°C (14°F), averaging only 2°C (36°F) and reaching a maximum of 18°C (65°F). Additionally, September experiences more precipitation, with 81 mm (3.2 in) over 10 days, while December sees 48 mm (1.9 in) across just 7 days. The humidity is also higher in September at 85%, compared to December's 73%. For more detailed information, you can explore San Martin de los Andes weather in September.
When comparing the weather in December to October, there are notable differences in temperature, precipitation, and humidity. December typically features a milder range of temperatures, with minimums around -2°C (29°F) and maximums reaching up to 28°C (83°F), while October has a colder minimum of -9°C (15°F) and a maximum of 23°C (73°F). Precipitation is lower in December, totaling 48 mm (1.9 in) over approximately 7 days, compared to October, which receives 102 mm (4.0 in) across 13 days. Additionally, December has a humidity level of 73%, slightly less than October's 79%. For more details on October weather, you can check San Martin de los Andes weather in October.
In comparing the weather of December and November, December tends to be milder with an average temperature of 12°C (53°F), contrasting with November's cooler average of 8°C (47°F). December experiences a broader temperature range, with minimums around -2°C (29°F) and maximums reaching up to 28°C (83°F), compared to November's minimum of -7°C (20°F) and maximum of 23°C (75°F). While December has slightly less precipitation at 48 mm (1.9 in) over 7 days, November records 58 mm (2.3 in) across 9 days. Humidity levels are relatively comparable, with December at 73% and November at 71%. For more detailed insights on November weather, you can check San Martin de los Andes weather in November.
As December arrives in San Martin de los Andes, the weather transforms into a delightful summer experience, showcasing warmer temperatures and increased daylight that entice both locals and visitors alike. Compared to the cooler months, temperatures can soar to pleasantly warm highs that invite outdoor adventures, while the occasional rainfall—averaging about seven rainy days—nurtures the stunning natural landscapes that define this region. The humidity levels, hovering around 73%, add a touch of freshness to the air, making it ideal for exploring the breathtaking lakes and mountains surrounding the town. For more detailed insights into the region's yearly weather patterns, visit San Martin de los Andes Climate.