Last updated: August 21, 2025
December in Santa Rosa, Argentina brings a delightful mix of summer warmth and occasional rain. With maximum temperatures soaring to 40°C (104°F), the city enjoys an average of 26°C (80°F), perfect for outdoor activities. However, the minimum temperature can dip to a comfortable 13°C (55°F) at night. Visitors should be prepared for some wet days, as the month sees around 113 mm (4.5 in) of precipitation over seven days, contributing to a humidity level of 75%. Whether basking in the sun or enjoying the refreshing rain, December offers a vibrant atmosphere for both locals and tourists alike.
In December, Santa Rosa, Argentina, experiences the transition into summer, with temperatures that reflect its warm climate. The month opens with a minimum of 13°C (55°F), climbing to an average of 26°C (80°F), and reaching a sweltering maximum of 40°C (104°F). This is consistent with the overall trend of rising temperatures as the year progresses; December's figures are notably higher than the cooler months prior, while still maintaining a level of comfort with its average temperature. As the days grow longer and warmer, residents and visitors alike can enjoy the sunshine, making it an ideal time for outdoor activities and festivities in this vibrant Argentinian city.
December in Santa Rosa, Argentina, marks a transition into the warmer summer months, characterized by a moderate precipitation total of 113 mm (4.5 in) spread across 7 rainy days. As the year draws to a close, rainfall levels remain steady, slightly lower than the preceding months; however, they still contribute to a lush landscape. Notably, December's precipitation is higher than the drier winter months, such as July and August, which typically see very little rain. The consistent December showers can be seen as a continuation of November's rainfall patterns, creating a rhythm of moisture that supports both agricultural needs and the vibrant ecosystem of the region. Overall, while December does experience a dip in rainfall compared to the peak months earlier in the year, it still plays a crucial role in sustaining the area's natural beauty and viability.
In December, Santa Rosa, Argentina, experiences a notable increase in humidity, reaching 75%. This figure is a jump from the drier conditions seen in the preceding months, particularly in August, when humidity plummets to a mere 46%. As the year progresses from summer through late spring, a clear trend emerges: humidity levels rise, peaking in May at 84%, before tapering off slightly in the subsequent months. With a 75% reading in December, residents can expect a more humid atmosphere, which marks a shift towards the wetter conditions typical of the region, making it a key month for both comfort and cultivation.
In December, Santa Rosa, Argentina experiences an UV Index of 14, placing it firmly within the extreme exposure category with a burn time of just 10 minutes. This marks a continuation of the year’s trend, as the area's UV levels have consistently remained high since November. The peak UV indices from January to October demonstrate a seasonal pattern, where the summer months typically record the most intense sun exposure. With consistently extreme levels persisting, it's crucial for residents and visitors alike to take precautions against harmful UV rays. For more insights and details, check out Santa Rosa UV Index.
UV Risk Categories
Santa Rosa, Argentina, basks in an impressive 376 hours of sunshine in December, marking the peak of its radiant summer. As the year draws to a close, the city enjoys a consistent upward trend in sunlight hours, with December boasting almost 50% more sunshine than the winter months of June and July, which average around 223 to 241 hours. This dramatic increase not only highlights the warmth of the region but also invites locals and visitors alike to revel in outdoor activities. Following the hustle of spring, where sunshine reaches its zenith in November at 324 hours, December wraps up the year with the sunniest days, ensuring a vibrant atmosphere filled with light and life. It’s a season that showcases nature’s brilliance and beckons exploration, making all of Santa Rosa glow with the joys of summer.
In December, Santa Rosa, Argentina experiences a notable increase in sunny weather, boasting a 74% chance of sunshine. This trend reflects a gradual shift towards brighter days as the year closes; following November's 66%, the likelihood of clear skies continues to climb. Comparatively, the earlier months of the year show varied sunshine probabilities, with January and March hovering around 52%, while the late spring months like October and November set a strong foundation for December’s peak sunshine. As the city transitions into summer, the consistent rise in sunny days paints a promising picture for those seeking warmth and light during the festive season.
In Santa Rosa, Argentina, December heralds the return of extended daylight, offering 13 hours of sunshine that mirrors the warmth of January and February. As the year unfolds, a notable trend is observed: daylight gradually diminishes from a peak of 13 hours in the summer months to just 10 hours during the winter. This gradual transition reflects the shifting seasons, with March marking the start of shorter days as they gradually decrease through the fall. However, as spring approaches in August, days lengthen once again, returning to 11 hours in both August and September before reaching back up to 12 hours in October and the familiar 13 hours by December. This ebb and flow of daylight not only shapes the landscape but also influences the vibrant outdoor life that characterizes Santa Rosa throughout the year.
In Santa Rosa, Argentina, December ushers in a gentle breeze, with an average wind speed of 3.8 m/s (8 mph), slightly higher than the preceding months. As the year transitions towards summer, a subtle upward trend in wind speed becomes apparent, peaking in September at 4.3 m/s (10 mph) before settling back down in December. Throughout the year, the winds remain relatively mild, oscillating between 3.1 m/s and 4.3 m/s, creating a pleasant atmosphere ideal for outdoor activities. This consistent yet moderate wind pattern not only enhances the charm of the region but also reflects the unique climatic character of Santa Rosa, making its December days feel refreshingly invigorating.
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.
In December, temperatures range from a minimum of 13°C (55°F) to a maximum of 40°C (104°F), with an average of 26°C (80°F). The month experiences a fair amount of rainfall, totaling 113 mm (4.5 in) over about 7 days, accompanied by high humidity levels at 75%.
In contrast, January sees slightly warmer conditions, with minimum temperatures starting at 15°C (58°F) and maximums rising to 43°C (109°F), averaging 28°C (82°F). Precipitation increases to 169 mm (6.6 in) over approximately 10 days, while humidity dips to a more comfortable 66%. The overall outlook for January reflects a continuation of warm weather but with more rain and slightly cooler humidity than December. For more detailed information, you can check Santa Rosa weather in January.
December and February share similar minimum temperatures, both starting at 13°C (55°F), and maintain an average of 26°C (80°F). However, February tends to be slightly warmer at its maximum, reaching 42°C (107°F) compared to December's 40°C (104°F). Precipitation levels drop significantly in February, with only 71 mm (2.8 in) over 8 days, contrasted with December's 113 mm (4.5 in) across 7 days. Additionally, February enjoys lower humidity at 61%, making it feel less muggy than December's 75%. For more specific details about February weather in Santa Rosa, visit Santa Rosa weather in February.
In December, temperatures in Santa Rosa range from a minimum of 13°C (55°F) to a maximum of 40°C (104°F), with an average temperature of 26°C (80°F). The month also experiences significant rainfall, totaling 113 mm (4.5 in) over about 7 days, contributing to a humidity level of 75%. In contrast, March sees slightly cooler temperatures, with a minimum of 12°C (53°F) and an average of 24°C (76°F), while still reaching up to 40°C (104°F) at the high end. Precipitation increases to 144 mm (5.7 in), occurring over 9 days, and humidity drops slightly to 71%. For more detailed information, visit Santa Rosa weather in March.
In December, Santa Rosa experiences warmer temperatures, with a minimum of 13°C (55°F) and reaching up to 40°C (104°F) on the hottest days, averaging around 26°C (80°F). The month sees about 113 mm (4.5 in) of precipitation over 7 days, accompanied by a humidity level of 75%. In contrast, April brings cooler temperatures, with minimums dropping to 8°C (46°F) and maximums up to 35°C (95°F), averaging 22°C (71°F). Precipitation increases slightly to 130 mm (5.1 in), also occurring over 7 days, and humidity rises to 81%. For more detailed insights, you can check Santa Rosa weather in April.
December and May in Santa Rosa showcase contrasting weather patterns. December experiences warmer temperatures, with daily highs reaching up to 40°C (104°F) and an average of 26°C (80°F), while May sees cooler conditions, where maximum temperatures peak at 32°C (89°F) and averages drop to 18°C (64°F). Although May has slightly higher precipitation at 129 mm (5.1 in) over 10 days compared to December's 113 mm (4.5 in) over 7 days, May's humidity levels are also higher at 84% versus December's 75%. For a more detailed look at the weather in May, visit Santa Rosa weather in May.
December and June present distinctly different weather patterns in Santa Rosa. In December, temperatures can soar from a minimum of 13°C (55°F) to a maximum of 40°C (104°F), with an average temperature of 26°C (80°F). This month sees notable precipitation of 113 mm (4.5 in) over about 7 days, and humidity levels hover around 75%. In contrast, June offers a much cooler climate, with temperatures ranging from a low of 2°C (35°F) to a high of 32°C (89°F), averaging only 16°C (61°F). The month has a lower precipitation level of 66 mm (2.6 in) spread across approximately 8 days, accompanied by slightly higher humidity at 76%. For more details, check out Santa Rosa weather in June.
In December, the weather is considerably warmer, with temperatures ranging from a minimum of 13°C (55°F) to a scorching maximum of 40°C (104°F) and an average of 26°C (80°F). The month also sees higher humidity levels at 75%, accompanied by substantial precipitation of 113 mm over approximately 7 days. In contrast, July experiences much cooler temperatures, with a minimum of 0°C (32°F) and a maximum of 32°C (91°F), resulting in an average temperature of only 15°C (60°F). July tends to be drier, with only 40 mm of precipitation spread across about 5 days and humidity at a lower 64%. For more details on July weather, please visit Santa Rosa weather in July.
In December, the weather is significantly warmer, with average temperatures reaching 26°C (80°F) and maximum highs soaring up to 40°C (104°F). This month also sees higher humidity at 75% and more frequent rainfall, with precipitation totaling 113 mm (4.5 in) over about 7 days. In contrast, August experiences much cooler temperatures, with an average of 17°C (63°F) and maximums around 37°C (99°F). The humidity is lower at 46%, and there is less precipitation, totaling only 47 mm (1.9 in) over 5 days. For more details on August weather patterns, you can visit Santa Rosa weather in August.
December and September exhibit notable differences in weather patterns. In December, temperatures range from a minimum of 13°C (55°F) to an average of 26°C (80°F), with maximums soaring to 40°C (104°F). This month also experiences higher humidity at 75% and significant precipitation of 113 mm (4.5 in) over 7 days. In contrast, September has a cooler climate, featuring minimum temperatures of 7°C (44°F) and an average of 20°C (68°F), with maximums reaching 39°C (102°F). Although September has slightly less precipitation at 104 mm (4.1 in) over 9 days, the humidity is notably lower at 55%. For more details, check out Santa Rosa weather in September.
In comparing December and October weather, December tends to be warmer with average temperatures reaching 26°C (80°F) compared to October's 22°C (72°F). While both months see high temperatures, October can occasionally peak at 41°C (107°F), slightly higher than December's maximum of 40°C (104°F). Additionally, December experiences more humidity at 75%, compared to October's 57%, contributing to a heavier and more oppressive atmosphere. Both months receive similar levels of precipitation, with December getting 113 mm (4.5 in) over 7 days and October receiving 106 mm (4.2 in) over 10 days. For a closer look at the October weather specifics, you can check Santa Rosa weather in October.
In comparing the weather between December and November, both months experience similar maximum temperatures, reaching up to 40°C (104°F). However, December tends to be slightly warmer overall, with an average temperature of 26°C (80°F) compared to November's 25°C (76°F). Precipitation is another key difference; December receives 113 mm (4.5 in) of rainfall over 7 days, while November records a higher amount of 136 mm (5.4 in) across 8 days. Additionally, December has a noticeably higher humidity level at 75%, compared to November's 59%. For more detailed insights, check out Santa Rosa weather in November.
As December unfolds in Santa Rosa, it brings a warm embrace with temperatures that can soar to a sweltering 40°C, contrasting sharply with the cooler months. The average of 26°C offers a pleasant reprieve, while nighttime lows may dip to 13°C, creating a delightful range for both day and night activities. While rainfall is not excessive, with about a week of precipitation, the humidity level typically around 75% can make it feel even warmer. This unique blend of heat and moisture distinguishes December from other months, inviting residents and visitors alike to enjoy the vibrant summer vibes. For a comprehensive look at the weather patterns year-round, check out Santa Rosa Climate.