Last updated: August 21, 2025
Experience the vibrant December weather of Cuiabá, Brazil, where temperatures are marked by a maximum of 36°C (97°F) and a comfortable average of 27°C (81°F). As the month unfolds, expect the mercury to dip to a pleasant minimum of 21°C (71°F). However, prepare for a wet season with an impressive 213 mm (8.4 in) of rainfall spread over 24 days, contributing to an humidity level of 84%. Such conditions create a lush atmosphere, perfect for embracing the rich biodiversity and vibrant culture that Cuiabá has to offer during this time.
In Cuiabá, Brazil, December marks the start of the sweltering summer months, with temperatures that reflect a warm and inviting climate. The month sees a minimum temperature of around 21°C (71°F), maintaining an average of 27°C (81°F), and peaking at a maximum of 36°C (97°F). This pattern aligns with the trend observed throughout the late months of the year, where temperatures gradually rise from the cooler autumnal months prior. As December progresses, the consistent warmth and relatively high humidity create an ideal backdrop for exploring this vibrant city, immersing visitors in its rich culture and stunning landscapes.
In December, Cuiabá, Brazil experiences a notable increase in precipitation, with 213 mm (8.4 in) of rain falling over 24 days. This marks a continuation of the wet season that begins in late spring, following the dry months of June and July when rainfall is virtually absent. December's rainfall is substantial, reflecting a shift from the relatively lower amounts seen in the earlier months, such as May with just 33 mm (1.3 in). The trend indicates a peak towards the end of the year, as November also displays heavy precipitation at 173 mm (6.8 in) over 21 days. This consistent pattern of increased rainfall highlights the region's transition into a more humid and lush environment as it closes the year, setting the stage for the vibrant growth that accompanies the rainy season.
In Cuiabá, Brazil, December brings a significant uptick in humidity, with levels reaching 84%. This increase marks a noticeable contrast to the drier months of October and September, where humidity plummeted to 29% and 30%, respectively. Following the trend of the humid wet season, December's moisture is reminiscent of the early months of the year, where humidity consistently hovered around 88%. As the year winds down, the city's climate shifts from the arid warmth of winter to a more tropical atmosphere, heralding the arrival of the rainy season. This colorful fluctuation captures the essence of Cuiabá's climate, where humidity reflects the rhythm of the seasons.
In Cuiaba, Brazil, December ushers in the year's highest UV Index, soaring to 16, which is categorized as extreme. This trend reflects a broader pattern observed throughout the year, where the UV Index remains consistently high from January through November, maintaining levels between 14 and 16. In fact, every month from August to December boasts an extreme UV rating, resulting in a hazardous burn time of just 10 minutes. As the season transitions, it's crucial for residents and visitors alike to remain vigilant about sun exposure. Whether enjoying outdoor activities or simply soaking up the sun, protective measures are essential to safeguard against harmful UV rays. For more information on the UV Index throughout the year, check out Cuiaba UV Index.
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December in Cuiabá, Brazil, welcomes an impressive 303 hours of sunshine, continuing the city's trend of abundant sunlight as the year draws to a close. Following the peak of 330 hours in July, the sunlight begins to taper slightly but remains vibrant through the final month. Compared to November's 290 hours, December shows a delightful rebound, reinforcing the region's reputation for plentiful sunshine throughout the summer. This generous light not only brightens the days but also sets the stage for a lively festive atmosphere, making December a cherished time for locals and visitors alike to bask in Cuiabá's warm embrace.
In Cuiabá, Brazil, the likelihood of sunny weather experiences a notable ebb and flow throughout the year. As we transition from the dry winter months into the wetter season, July tops the chart with a striking 91% chance of sunshine, embodying the peak of dry-season bliss. This sunny trend begins to wane in August and September, where chances remain high but decline to 78% and 66% respectively. However, by the time December rolls around, the chances of sun dip to a modest 16%, marking a stark contrast to the sun-drenched days of mid-year. This seasonal fluctuation underscores the distinct wet and dry periods in Cuiabá, emphasizing December as one of the cloudier months of the year.
In Cuiabá, Brazil, December ushers in an inviting increase in daylight, with the sun gracing the skies for 13 hours a day. This marked extension of daylight follows a gradual transition from the year’s earlier months, where January through March enjoy a steady 12 hours. As the year progresses into the latter months, daylight dips slightly to 11 hours from April to August. However, as September rolls around, daylight begins to rebound, returning to a comfortable 12 hours through November. This year-end surge not only enhances outdoor activities but also enriches the festive spirit, making December a vibrantly lit month in the capital of Mato Grosso.
In Cuiabá, Brazil, December ushers in a gentle breeze with an average wind speed of 1.9 m/s (4 mph). As the year winds down, this is consistent with the lighter winds characteristic of the earlier months, although slightly elevated compared to November's 1.9 m/s. Observing a subtle upward trend through the mid-year, wind speeds peaked at 2.5 m/s (6 mph) in August, only to retreat as the city transitions into the warmer, humid season. December's breeze, while mild, hints at the calming yet dynamic essence of Cuiabá's climate, providing a pleasant backdrop for outdoor activities during the festive close of the year. The winds here reflect a rhythm of nature, inviting residents and visitors alike to enjoy the charm of this Brazilian jewel.
Weather in Cuiaba varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Cuiaba, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather typically sees temperatures ranging from a minimum of 21°C (71°F) to a maximum of 36°C (97°F), with an average temperature of 27°C (81°F). The month experiences significant rainfall, with 213 mm (8.4 in) spread over 24 days, and the humidity levels are quite high at 84%.
In contrast, January offers slightly warmer conditions, with a minimum temperature of 22°C (72°F) and a maximum of 37°C (98°F), while still averaging at 27°C (81°F). Precipitation decreases to 168 mm (6.6 in) over 21 days, but humidity rises to 88%. This shift highlights a marginal increase in temperature and an increase in humidity levels in January, along with reduced rainfall. For more detailed insights, you can check Cuiaba weather in January.
In December, the weather features temperatures ranging from a minimum of 21°C (71°F) to a maximum of 36°C (97°F), with an average of 27°C (81°F). The month experiences significant precipitation, totaling 213 mm (8.4 in) over 24 days, accompanied by high humidity at 84%. In contrast, February presents slightly cooler maximum temperatures, peaking at 35°C (95°F) while maintaining a similar minimum of 21°C (70°F) and an average of 27°C (80°F). Precipitation increases to 224 mm (8.8 in) over the same number of days, and humidity rises to 88%. For more detailed information about the weather patterns in February, visit Cuiaba weather in February.
In December, temperatures in Cuiabá range from a minimum of 21°C (71°F) to a maximum of 36°C (97°F), with an average of 27°C (81°F). The month experiences significant rainfall, totaling 213 mm (8.4 in) over 24 days, and the humidity levels are relatively high at 84%. Conversely, March shares similar temperature profiles, with the same minimum and maximum values and an average temperature of 27°C (81°F). However, it sees slightly less precipitation at 201 mm (7.9 in) over 23 days and a higher humidity rate of 89%. For more details on March weather, check out Cuiaba weather in March.
In comparing the weather of December and April, some notable differences emerge. December sees higher average temperatures, ranging from a minimum of 21°C (71°F) to a maximum of 36°C (97°F), while April has a slightly cooler minimum of 15°C (59°F) and maintains the same maximum of 36°C (97°F). Rainfall in December is significantly higher, with 213 mm (8.4 in) over 24 days compared to April's 123 mm (4.8 in) over just 16 days. Humidity levels are also higher in April at 87%, compared to December's 84%. For more detailed information, you can check out Cuiaba weather in April.
December and May present contrasting weather patterns. December experiences warm temperatures, with a minimum of 21°C (71°F) and a maximum of 36°C (97°F), along with high humidity levels reaching 84%. There is considerable rainfall, averaging 213 mm (8.4 in) over 24 days, contributing to a lush and vibrant atmosphere. In contrast, May sees a more moderate climate, with a minimum temperature of 7°C (45°F) and a maximum of 34°C (94°F). It has significantly less precipitation, totaling 33 mm (1.3 in) over just 6 days and a lower humidity of 78%. For a detailed insight into May's weather specifics, you can refer to Cuiaba weather in May.
December and June present stark contrasts in weather conditions. December boasts warm temperatures, with lows around 21°C (71°F) and highs reaching up to 36°C (97°F), alongside high humidity levels of 84% and significant rainfall of 213 mm spread over 24 days. In comparison, June offers a much cooler climate, with minimum temperatures dropping to 10°C (51°F) and average highs around 35°C (95°F). Notably, June experiences minimal precipitation—just 2 mm—over the entire month, and with a humidity level of 63%, the atmosphere feels far less muggy. For more detailed insights on June weather, you can refer to Cuiaba weather in June.
The weather in December and July showcases stark contrasts in Cuiabá. December experiences significantly higher temperatures, with a range from a minimum of 21°C (71°F) to a maximum of 36°C (97°F), and an average of 27°C (81°F). This month is also characterized by high precipitation, receiving about 213 mm (8.4 in) over 24 days, alongside a humidity level of 84%. In contrast, July boasts cooler temperatures, with a minimum of 8°C (47°F) and a maximum of 35°C (96°F), averaging around 24°C (75°F). Remarkably, July sees no rainfall, marked by 0 mm (0.0 in) of precipitation over the entire month, and a lower humidity of 50%. For more information about the weather in July, you can visit Cuiaba weather in July.
December and August in Cuiabá present strikingly different weather patterns. In December, temperatures range from a minimum of 21°C (71°F) to a maximum of 36°C (97°F), with an average of 27°C (81°F). This month is characterized by significant rainfall, totaling 213 mm (8.4 in) over 24 days, and high humidity levels at 84%. In contrast, August offers a cooler climate with temperatures dropping to a minimum of 11°C (52°F) and peaking at 39°C (102°F), averaging 26°C (79°F). Precipitation is minimal during this month, only 12 mm (0.5 in) over just one day, and humidity levels are considerably lower at 39%. For more details on August weather, check Cuiaba weather in August.
December weather in Cuiabá is characterized by higher temperatures and significantly more rainfall compared to September. While December boasts a minimum temperature of 21°C (71°F) and averages 27°C (81°F), it can peak at a scorching 36°C (97°F) with persistent humidity levels reaching 84%. In stark contrast, September presents a much cooler minimum of 12°C (54°F) while averaging a warmer 29°C (84°F) and soaring up to an impressive maximum of 41°C (106°F). Notably, September experiences minimal rainfall, with just 26 mm (1.0 in) over 5 days, highlighting its dry conditions when compared to December’s 213 mm (8.4 in) across 24 days. For those interested in more details, you can view Cuiaba weather in September.
When comparing the weather in December and October in Cuiabá, notable differences emerge. December experiences a slightly warmer average temperature of 27°C (81°F), with maximum highs reaching up to 36°C (97°F). In contrast, October boasts a higher maximum of 41°C (107°F), despite a lower average temperature of 28°C (84°F). Additionally, December is characterized by much higher humidity at 84% and significantly more precipitation, with 213 mm (8.4 in) over 24 days, compared to October's 106 mm (4.2 in) over 14 days. For a closer look at October’s conditions, you can explore more details here: Cuiaba weather in October.
In December, the weather in Cuiabá shows slightly warmer temperatures, with a minimum of 21°C (71°F) and a maximum of 36°C (97°F), compared to November, which has a lower maximum of 39°C (102°F). While both months feature an average temperature of around 27°C (81°F), December experiences increased precipitation, with 213 mm (8.4 in) falling over 24 days, compared to November’s 173 mm (6.8 in) across 21 days. Additionally, December's humidity rises to 84%, significantly higher than November’s 62%. For more detailed insights on November weather, you can check Cuiaba weather in November.
In December, Cuiabá experiences notably hot and humid weather, marking a shift from the cooler months earlier in the year. With an average temperature rising to a sultry 27°C (81°F) and peaks reaching up to 36°C (97°F), it's a time when the city's vibrant life feels even more alive. However, this heat is accompanied by significant rainfall, with nearly 24 days of precipitation contributing to a high humidity level of 84%. This combination creates a tropical ambiance, perfect for those who enjoy warm climates but may not suit everyone’s preferences. For more insights into how Cuiabá's weather patterns shift throughout the year, check out Cuiaba Climate.