Last updated: August 21, 2025
In December, Santa Cruz do Sul, Brazil, experiences a vibrant summer climate characterized by maximum temperatures reaching up to 39°C (102°F) and an average of 24°C (75°F). Residents enjoy warm days although the evenings can be cooler, with temperatures dropping to a minimum of 10°C (51°F). This month brings about 80 mm (3.1 in) of rainfall, spread across 8 days, resulting in a humidity level of 85% that adds a tropical feel to the atmosphere. Whether basking in the sun or enjoying the freshness after rain, December in Santa Cruz do Sul offers a lively blend of warmth and moisture that defines its summer appeal.
In Santa Cruz do Sul, Brazil, December ushers in the summer season with a delightful warmth that sets the tone for the month. Temperatures typically range from a minimum of 10°C (51°F) to a maximum of 39°C (102°F), with an average of 24°C (75°F). This trend reflects the overall pattern of climbing temperatures throughout the year, as December is one of the hottest months, just like its adjacent summer months of January and February. The steady rise in average temperatures from late spring into summer makes December a perfect time for outdoor activities, vibrant festivities, and enjoying the lush Brazilian scenery.
In December, Santa Cruz do Sul experiences a noticeable shift in its precipitation pattern, with an average of 80 mm (3.1 in) of rainfall over 8 days. This marks a decrease compared to the previous months, particularly November, which saw 124 mm (4.9 in) over 10 days. As the year comes to a close, the region transitions into its more arid season, showcasing a decline in total precipitation and frequency of rainy days. This trend follows an overall pattern of varying rainfall throughout the year, where the peak occurs during the wet months of May and October, while December rounds off the year with a drier spell, inviting a refreshing respite from the heavier rains seen earlier.
In December, Santa Cruz do Sul, Brazil, experiences a noticeable increase in humidity, reaching 85%—a significant rise compared to the preceding months. This uptick signals the onset of the warmer and more humid summer season, as the humidity levels gradually climb from 71% in August to an impressive 87% in May. Throughout the year, humidity tends to peak during the wetter months, particularly April and May, before slightly declining in the later months. However, December stands out as a key transitional period, setting the stage for the sultry heat of summer while reflecting a broader trend of elevated moisture that characterizes this vibrant Brazilian locale.
In December, Santa Cruz do Sul experiences a peak UV Index of 14, classifying this month under the extreme exposure category with a quick burn time of just 10 minutes. This trend is consistent with the city's January and November readings, where similar extreme levels were recorded. As the year draws to a close, residents and visitors alike should take particular care during outdoor activities to protect against the sun's potent rays. Comparatively, the UV Index gradually decreased from the extreme highs in the first half of the year to very high and high categories in the subsequent months, only to return to dangerous levels by December. For further insights on how to navigate these UV challenges, visit Santa Cruz do Sul UV Index.
UV Risk Categories
December in Santa Cruz do Sul, Brazil, stands out as a radiant jewel among the months, boasting an impressive 361 hours of sunshine. This month significantly outshines others, notably November's 310 hours. The trend in sunlight is particularly striking as December caps off the year with a bright finale, following a gradual increase from October's 269 hours. While the earlier months, like June and July, see a dip in sunshine, the second half of the year clearly embraces an upward trajectory, culminating in the sun-kissed days of December. This abundance of sunlight not only enhances the festive atmosphere but also invites residents and visitors alike to bask in the warmth of summer, making it a perfect time to explore the vibrant beauty of Santa Cruz do Sul.
In Santa Cruz do Sul, December offers a promising 58% chance of sunny weather, making it a delightful time to enjoy the outdoors. As the year transitions from spring to summer, the likelihood of sunshine increases compared to the preceding months, particularly from the lower percentages witnessed in June and September. This upward trend culminates as the region embraces warmer weather, with July showcasing the highest probability of sun at 62%. Overall, if you're planning a visit to this vibrant city in December, you're likely to encounter pleasant days that perfect for exploring its scenic charm.
In Santa Cruz do Sul, Brazil, December marks the peak of daylight, with an impressive 14 hours of sun shining down each day. This increase in daylight is a delightful contrast to the shorter days experienced in the earlier months, particularly May to July, where daylight dwindles to a mere 10 hours. As the year progresses from January through March, daylight gradually decreases, reaching its low in April. However, as the seasons shift, September and October see a resurgence, bringing back 11 to 12 hours of brightness before December's extended daylight. Overall, the trend showcases a dynamic yearly cycle, where the radiance of summer culminates in December's longest days, inviting both natural beauty and outdoor adventure.
As December descends upon Santa Cruz do Sul, the wind begins to pick up, making its presence felt with an average speed of 3.1 m/s (7 mph), the highest recorded for the year. This noticeable increase from November's 3.0 m/s signals the onset of summer breezes, providing a refreshing respite from the humidity. Throughout the year, wind speeds in this vibrant Brazilian city fluctuate, generally remaining around the 2.5 m/s mark from May through August, but December's gusts hint at a shift toward warmer, more dynamic weather. The gentle breezes that accompany the warmer months give life to outdoor activities and beach adventures, enhancing the allure of Santa Cruz do Sul as a seasonal destination.
Weather in Santa Cruz do Sul varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Santa Cruz do Sul, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, weather in Santa Cruz do Sul features a minimum temperature of 10°C (51°F) and an average of 24°C (75°F), peaking at 39°C (102°F). With 80 mm (3.1 in) of precipitation over 8 days and a humidity level of 85%, the month tends to feel quite warm and muggy. Conversely, January sees a slight increase in minimum temperature to 12°C (54°F) and an average of 25°C (77°F), with similar maximum temperatures of 39°C (103°F). However, January experiences more rainfall, totaling 120 mm (4.7 in) across 13 days, along with lower humidity at 74%. For a detailed look at January's weather specifics, visit Santa Cruz do Sul weather in January.
In December, the weather in Santa Cruz do Sul is characterized by warm temperatures, with a minimum of 10°C (51°F) and a maximum reaching up to 39°C (102°F). The month typically experiences an average temperature of 24°C (75°F) and receives about 80 mm (3.1 in) of precipitation over 8 days, accompanied by high humidity levels of around 85%.
In contrast, February sees slightly milder temperatures, with a minimum of 11°C (52°F) and a maximum of 37°C (99°F), all while maintaining a similar average temperature of 24°C (76°F). This month experiences a bit more rainfall, totaling approximately 94 mm (3.7 in) over 11 days, but the humidity drops to a more comfortable 73%.
For more detailed information about the weather conditions in this region, you can check Santa Cruz do Sul weather in February.
December and March in Santa Cruz do Sul exhibit similar warm temperatures, but with slight variations in their climate patterns. December boasts a minimum temperature of 10°C (51°F) and an average of 24°C (75°F), while March starts with a slightly higher minimum of 11°C (52°F) and a comparable average of 23°C (73°F). The maximum temperatures in both months are close, peaking at 39°C (102°F) in December and slightly lower at 38°C (101°F) in March. However, March experiences more precipitation, totaling 110 mm (4.3 in) over 9 days compared to December’s 80 mm (3.1 in) over 8 days, resulting in lower humidity levels in March at 73%, compared to December's 85%. For more detailed information, you can check Santa Cruz do Sul weather in March.
When comparing December and April weather, December typically boasts warmer temperatures, with averages reaching up to 24°C (75°F) and maximums soaring to 39°C (102°F). In contrast, April sees slightly cooler temperatures, averaging 20°C (69°F) and peaking at 34°C (94°F). Both months experience similar levels of precipitation, with December recording 80 mm (3.1 in) over 8 days and April slightly higher at 82 mm (3.2 in) over 9 days. Additionally, December has a higher humidity level of 85%, whereas April's humidity is a bit lower at 81%. For more details on April weather specifics, you can check Santa Cruz do Sul weather in April.
In comparing the weather of December and May, we observe notable differences in temperature and precipitation. December boasts warmer temperatures, ranging from a minimum of 10°C (51°F) and an average of 24°C (75°F) up to a maximum of 39°C (102°F). In contrast, May features cooler weather, with temperatures dipping to a minimum of 3°C (38°F), an average of 16°C (62°F), and a maximum of 32°C (91°F).
Precipitation also varies between the two months; December experiences approximately 80 mm (3.1 in) over 8 days, while May is significantly wetter, receiving 174 mm (6.9 in) over 12 days. Humidity levels remain relatively high in both months, with December at 85% and May slightly higher at 87%. For more detailed insights into May weather, you can visit Santa Cruz do Sul weather in May.
In December, the weather in Santa Cruz do Sul is notably warmer, with temperatures ranging from a minimum of 10°C (51°F) to a maximum of 39°C (102°F) and an average of 24°C (75°F). The month experiences significant humidity at 85% and about 80 mm (3.1 in) of precipitation over 8 days. In contrast, June presents much cooler conditions, with temperatures ranging from a chilly 0°C (32°F) to a moderate 30°C (87°F) and an average of 15°C (59°F). June records higher precipitation at 117 mm (4.6 in) over 9 days, while maintaining a similar humidity level at 84%. For more detailed information on June weather, you can visit Santa Cruz do Sul weather in June.
December and July present a striking contrast in weather patterns. In December, temperatures range from a minimum of 10°C (51°F) to a maximum of 39°C (102°F), with an average of 24°C (75°F) and relatively high humidity at 85%. This month also sees about 80 mm (3.1 in) of precipitation over approximately 8 days. In contrast, July experiences much cooler conditions, with temperatures varying from a chilling -1°C (31°F) to a more moderate maximum of 31°C (87°F), averaging around 14°C (57°F). This winter month has higher precipitation levels, totaling 115 mm (4.5 in) across 10 days, paired with slightly lower humidity of 80%. For a detailed look at July weather in Santa Cruz do Sul, you can check Santa Cruz do Sul weather in July.
December and August in Santa Cruz do Sul present contrasting weather patterns. In December, temperatures are notably warmer, with a minimum of 10°C (51°F) and an average high of 39°C (102°F), leading to a humid environment with 85% humidity and 80 mm of precipitation over approximately 8 days. Conversely, August experiences a cooler climate, where temperatures drop to a minimum of 0°C (32°F) and peak at 34°C (94°F). Despite slightly higher rainfall at 86 mm across 9 days, the overall humidity is lower at 71%. For more information, check the full details on Santa Cruz do Sul weather in August.
December and September showcase contrasting weather patterns in terms of temperature and precipitation. In December, temperatures range from a minimum of 10°C (51°F) to a maximum of 39°C (102°F), with an average of 24°C (75°F), making it significantly warmer than September, which has a cooler range of 5°C (41°F) to 34°C (94°F) and an average temperature of 18°C (64°F). Additionally, December experiences lower precipitation at 80 mm (3.1 in) over 8 days, compared to September's higher rainfall of 154 mm (6.1 in) across 11 days. Humidity also differs, with December having a higher humidity level at 85%, while September's humidity is at 74%. For more detailed insights, you can check Santa Cruz do Sul weather in September.
When comparing the weather in December and October, it's evident that December offers warmer temperatures, with minimums around 10°C (51°F) and maximums reaching up to 39°C (102°F). In contrast, October features slightly cooler temperatures, with a minimum of 8°C (46°F) and a maximum of 38°C (100°F). Precipitation levels also differ significantly; October experiences higher rainfall, with 170 mm (6.7 in) over 13 days, compared to December's 80 mm (3.1 in) spread across 8 days. Despite the increased rainfall in October, the humidity levels remain relatively comfortable, peaking at 77%, whereas December's heightened humidity of 85% can make the heat feel more intense. For more details, check out Santa Cruz do Sul weather in October.
In comparing the weather of December and November, December tends to be warmer with average temperatures reaching up to 24°C (75°F), compared to November’s average of 21°C (71°F). Both months experience mild minimum temperatures of around 10°C, but December can peak slightly higher at 39°C (102°F) versus November's 38°C (100°F). Precipitation levels decrease in December with 80 mm (3.1 in) spread over 8 days, while November sees a higher total of 124 mm (4.9 in) over 10 days, indicating wetter conditions that month. Additionally, humidity is noticeably higher in December at 85%, compared to November's 77%. For further details, you can check Santa Cruz do Sul weather in November.
As December unfolds in Santa Cruz do Sul, the weather takes on a vibrant character that sets it apart from the rest of the year. With soaring daytime temperatures often reaching their peak, residents and visitors alike experience a blend of warmth and humidity, typically hovering around 85%, contributing to a lively, tropical atmosphere. The month sees an average temperature that's pleasantly milder than the heights of summer, while occasional rain showers—a total of 80 mm over about eight days—offer refreshing breaks from the heat. This combination not only creates ideal conditions for outdoor activities but also gives the city a festive spirit as it welcomes the summer season. For a deeper dive into what to expect throughout the year, visit Santa Cruz do Sul Climate.