Last updated: August 21, 2025
In Santa Rosa, Argentina, the weather in December offers a striking contrast, characterized by a maximum temperature soaring to an impressive 42°C (107°F), complemented by an average temperature of around 25°C (78°F). As the summer sun shines brightly, nighttime brings a refreshing minimum of 12°C (53°F). Despite the warmth, residents and visitors can expect 40 mm (1.6 in) of rain spread over 8 days, contributing to the region's relatively low humidity of 35%. Whether basking in the sun or enjoying mild evenings, December in Santa Rosa is a vibrant and dynamic experience.
In December, Santa Rosa, Argentina experiences a delightful shift towards summer, with temperatures striking a harmonious balance. The month opens with a mild minimum of 12°C (53°F), rising to an enjoyable average of 25°C (78°F), while the peak can soar to a sizzling 42°C (107°F). As the final month of the year approaches, residents and visitors alike can expect warm, sunny days perfect for outdoor activities, reflecting a trend where temperatures progressively rise from the cooler days of winter. This warmth continues the upward trajectory seen from earlier months, emphasizing December's role as a welcome precursor to the height of summer in Santa Rosa.
In December, Santa Rosa experiences a substantial shift in precipitation, receiving 40 mm (1.6 in) of rainfall over the month. This marks a slight decrease from the previous month, November, which had 46 mm (1.8 in), but maintains a noteworthy consistency with 8 rainy days. As the year draws to a close, December's weather continues the trend of earlier months, where precipitation steadily declines from a peak of 60 mm in February to the much drier winter months. The month captures the essence of late spring in Argentina, offering a mix of sun and rain that supports the vibrant landscapes as the summer approaches.
In December, Santa Rosa, Argentina, enjoys a refreshing drop in humidity, reaching a comfortable 35%. This noticeable decline follows a gradual increase throughout the year, where humidity levels climbed from a mild 40% in January to a peak of 69% in May. As the year draws to a close, residents and visitors alike can appreciate the crisp, dry air that December brings, contrasting sharply with the wetter months preceding it. With humidity tapering off, this time of year becomes ideal for outdoor activities, highlighting the region's pleasant summer climate.
In December, Santa Rosa, Argentina, experiences an extreme UV Index of 15, mirroring January's levels and reflecting a trend of heightened sun exposure during the peak of summer. With a brief burn time of only 10 minutes, it's crucial for residents and visitors to take precautions against the sun's harmful rays. This month's elevated UV levels follow a gradual decline from March's extreme indexes, showcasing a shift towards more moderate readings in the cooler months. As we venture into December, remember to stay protected and check the daily forecast at Santa Rosa UV Index.
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In Santa Rosa, Argentina, December shines brightly with an impressive 392 hours of sunlight, marking it as the sunniest month of the year. This vibrant sunshine sets the stage for the summer season, following a gradual increase in daylight from November's 370 hours. As the year progresses, a distinctive trend emerges—sunlight hours consistently climb from the cooler months, peaking in late spring and early summer. After a dip in the winter months of May and June, where sun exposure lingers around 264 and 257 hours respectively, the skies begin to clear again, culminating in a glorious finale to the year. With such abundant sunlight, December invites both locals and visitors to embrace the outdoor charms of the region, making it a perfect time to bask in nature's glow.
In Santa Rosa, Argentina, the likelihood of sunny weather in December stands at 62%, which reflects a gradual decline compared to the sunnier previous months. As the year winds down, December's probabilities seem less promising than the vibrant summer peaks of July and August, where 87% and 80% of days are typically basked in sunlight. Notably, the earlier months of April and November also showcase a stronger chance of clear skies, at 71% and 74% respectively. While December still offers a moderate chance for sunshine, it's clear that the weather tends to become a bit more unpredictable, hinting at the seasonal transition as the year comes to a close.
In Santa Rosa, Argentina, December marks the return of longer days, with approximately 14 hours of daylight, mirroring the light-filled days of January. This summer brightness contrasts sharply with the winter months of June, where daylight dips to its lowest at 9 hours. As the year progresses, daylight gradually wanes from the peak in January, through a steady decline until it reaches 10 hours in May, before beginning a reversal in September. Nature's rhythm is evident as longer days stretch into the summer months, igniting a spirited shift in outdoor activities and community gatherings, culminating in a vibrant end to the year.
In December, Santa Rosa, Argentina, experiences a notable uptick in wind activity, with an average wind speed of 4.0 m/s (9 mph). This slight increase aligns with the trend of rising winds observed in the late months of the year, particularly when compared to the calmer conditions of May and June, which see speeds dip to around 2.7 m/s (6 mph). As the year draws to a close, December stands out not only for its breezy weather but also as part of a broader pattern where wind speeds begin to gather momentum. This brings a refreshing energy to the region, making the festive atmosphere even more vibrant.
Weather in Santa Rosa varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Santa Rosa, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January in Santa Rosa exhibit some notable differences in weather patterns. In December, temperatures range from a minimum of 12°C (53°F) to a maximum of 42°C (107°F), with an average of 25°C (78°F), while January slightly cools down, with a minimum of 8°C (47°F), an average of 26°C (80°F), and the same peak maximum temperature of 42°C (107°F). Precipitation increases from 40 mm (1.6 in) over 8 days in December to 58 mm (2.3 in) across 9 days in January, contributing to higher humidity levels of 40% compared to December's 35%. For more detailed insights on January weather, you can visit Santa Rosa weather in January.
In December, temperatures in Santa Rosa range from a minimum of 12°C (53°F) to a maximum of 42°C (107°F), with an average of 25°C (78°F). The month experiences around 40 mm (1.6 in) of precipitation over 8 days, accompanied by relatively low humidity at 35%. In contrast, February presents slightly cooler temperatures, with a minimum of 10°C (50°F) and an average of 24°C (76°F), peaking at 41°C (106°F). The precipitation increases to 60 mm (2.4 in) over the same number of days, and humidity rises to 46%. For more detailed insights, you can check Santa Rosa weather in February.
In December, the weather is characterized by much warmer temperatures, with a minimum of 12°C (53°F) and a maximum reaching up to 42°C (107°F), while the average temperature sits at around 25°C (78°F). The humidity is relatively low at 35%, and there are about 8 days of precipitation totaling 40 mm (1.6 in). In contrast, March experiences cooler temperatures, with a minimum of 4°C (39°F) and an average of 22°C (71°F). The maximum temperature in this month is slightly lower at 37°C (99°F). Notably, March also sees an increase in humidity at 54% and slightly higher precipitation, totaling 48 mm (1.9 in) over 7 days. For more detailed insights on the weather, check out Santa Rosa weather in March.
In December, temperatures can soar significantly, with a minimum of 12°C (53°F) and highs reaching up to 42°C (107°F), providing a warm atmosphere typical of summer. The month experiences an average temperature of 25°C (78°F) and has 40 mm (1.6 in) of rainfall over about 8 days, alongside a relatively low humidity of 35%. In contrast, April brings a refreshing shift, with much cooler temperatures ranging from a minimum of 2°C (36°F) to a maximum of 32°C (90°F), averaging around 18°C (64°F). This month sees slightly less precipitation at 33 mm (1.3 in) over approximately 5 days, but the humidity rises significantly to 65%, creating a more humid environment. For a detailed look at what to expect, you can visit Santa Rosa weather in April.
In December, temperatures in Santa Rosa are significantly warmer, with a minimum of 12°C (53°F) and a maximum reaching up to 42°C (107°F), creating a hot and dry environment with low humidity at 35%. In contrast, May presents a much cooler climate, with temperatures ranging from a chilly -1°C (31°F) to a comfortable maximum of 28°C (83°F), coupled with higher humidity levels at 69%. Additionally, May experiences less precipitation spread across fewer days—only 29 mm (1.1 in) over 3 days—while December sees more rainfall at 40 mm (1.6 in) over 8 days. For more details on the weather in May, visit Santa Rosa weather in May.
December and June offer starkly contrasting weather conditions. In December, temperatures range from a minimum of 12°C (53°F) to a scorching maximum of 42°C (107°F), with an average of 25°C (78°F) and low humidity at 35%. Despite some warmth, there is a moderate amount of precipitation at 40 mm (1.6 in) over approximately 8 days. In contrast, June features much cooler temperatures, with a minimum of -4°C (25°F) and a maximum of 26°C (79°F), averaging only 9°C (48°F). The month brings significantly less precipitation, totaling just 8 mm (0.3 in) over 2 days, but higher humidity at 64%. For more detailed insights, you can check out Santa Rosa weather in June.
Comparing the weather in December and July reveals distinct contrasts. December boasts much warmer temperatures, with a minimum of 12°C (53°F) and highs reaching up to 42°C (107°F), creating a hot and dry environment with low humidity at 35% and moderate precipitation. In stark contrast, July offers a chillier climate, where temperatures can drop to as low as -4°C (25°F), with an average temperature of only 8°C (47°F) and maximums of 23°C (74°F). July is also marked by higher humidity at 65% but experiences significantly less precipitation, averaging just 7 mm (0.3 in) over a single day. For more details, you can visit Santa Rosa weather in July.
The weather in December is significantly warmer and drier compared to August. With temperatures ranging from a low of 12°C (53°F) to a scorching high of 42°C (107°F) and only 40 mm of precipitation over eight days, December features a much lower humidity level of 35%. In contrast, August experiences much cooler temperatures, with a minimum of -4°C (25°F) and a maximum of 31°C (88°F). It also has very little precipitation, averaging just 4 mm over one day, but the humidity is higher at 60%. For a detailed look at August weather, you can refer to Santa Rosa weather in August.
December and September exhibit stark differences in weather conditions. In December, temperatures range from a minimum of 12°C (53°F) to a scorching maximum of 42°C (107°F), with an average of 25°C (78°F). This month experiences about 40 mm (1.6 in) of precipitation over approximately 8 days, coupled with a lower humidity of 35%. In contrast, September sees much cooler temperatures, with a minimum of -2°C (28°F), an average of 16°C (61°F), and a maximum reaching 36°C (96°F). The month only receives 9 mm (0.4 in) of precipitation over just 1 rainy day and maintains a higher humidity level of 51%. For more detailed information, you can check Santa Rosa weather in September.
When comparing the weather between December and October, December tends to be significantly warmer, with temperatures ranging from a minimum of 12°C (53°F) to a maximum of 42°C (107°F), while October experiences much cooler conditions, with a minimum of 0°C (32°F) and a maximum of 39°C (103°F). Precipitation is slightly higher in December, averaging 40 mm (1.6 in) over about 8 days, compared to October's 25 mm (1.0 in) over 4 days. Furthermore, humidity levels are lower in December at 35%, contrasting with October's higher humidity of 49%. For more details, you can check Santa Rosa weather in October.
In December, temperatures tend to be higher than in November, with a minimum of 12°C (53°F) compared to November's 6°C (42°F), while the average temperature rises to 25°C (78°F) from November’s 23°C (74°F). The maximum temperature in December reaches 42°C (107°F), just slightly above November's peak of 41°C (105°F). Precipitation decreases slightly in December to 40 mm (1.6 in), down from 46 mm (1.8 in) in November, although both months see rain over 8 days. Humidity also drops in December to 35%, making the air feel drier compared to the 44% humidity experienced in November. For more detailed information on November weather, you can visit Santa Rosa weather in November.
In December, Santa Rosa experiences a distinct shift in weather, marked by a delightful warmth that sets it apart from the cooler months. With average temperatures soaring to a comfortable 25°C (78°F), the city embraces the summer season, inviting both locals and visitors to enjoy outdoor activities. Rainfall is relatively modest, occurring on just a few days, which combines with a low 35% humidity to create pleasant, dry conditions. This month serves as a vibrant transition, showcasing the region's sunny allure while minimizing the chill often felt in the earlier months. To explore more about the weather patterns throughout the year, visit Santa Rosa Climate.