Last updated: August 28, 2025
December in Montevideo, Uruguay marks the transition into summer, with maximum temperatures soaring to a pleasant 29°C (84°F). The average temperature settles at a comfortable 21°C (69°F), ideal for enjoying the city’s vibrant outdoor life. Evenings cool off to a minimum of 13°C (57°F), providing a refreshing respite. While December is generally dry, residents can expect approximately 61 mm (2.4 in) of rainfall spread over about 5 days, contributing to a humidity level of 65% that lends a tropical feel to the warm days. Embrace the warmth and festivities of this lively season!
In December, Montevideo, Uruguay, welcomes the summer heat with temperatures ranging from 13°C (57°F) at night to a warm 29°C (84°F) during the day. This month showcases a delightful average of 21°C (69°F), making it an ideal time for beach outings and outdoor festivities. As the holiday season approaches, the city buzzes with life under the sun, marking a vibrant transition from the cooler, crisper days of early spring. Compared to the preceding months, December stands out with its higher temperatures, reflecting the southern hemisphere's shift into the warmth of summer. Visitors can relish in the pleasant weather while enjoying the lively atmosphere that Montevideo has to offer.
In December, Montevideo experiences a relatively dry spell, with precipitation totaling just 61 mm (2.4 in) over the month, matching the lighter rainfall typically seen in January. Notably, December also boasts a mere five days of rainfall, indicating a distinct trend towards drier conditions as summer approaches. This pattern contrasts with the wetter months earlier in the year, such as May and July, where precipitation peaks at 115 mm (4.5 in) and 122 mm (4.8 in), respectively. As the year closes, the city remains sunny and warm, making December an appealing month for outdoor activities amidst the occasional refreshing shower.
In Montevideo, Uruguay, December brings a noticeable dip in humidity, down to 65% after the peak levels of late autumn. This seasonal shift typically indicates a transition from the moister months of May and June, which see humidity levels rising to around 82% and 80%, respectively. As the city moves from the warmer summer months of January and February—where humidity can reach 63% and 69%—to December's milder atmosphere, residents experience a gradual decline that offers a refreshing respite. Overall, the trend from late spring into summer reveals a pattern of increasing humidity, with December providing a brief but welcome ease before the heat of summer fully sets in.
In December, Montevideo experiences its most intense sun exposure, with a UV Index reaching 14, categorizing it as extreme and resulting in a rapid burn time of just 10 minutes. This high level of UV radiation is consistent with the trends noted in the preceding summer months of January and February, which also recorded an extreme index. As the year draws to a close, the UV Index highlights the importance of sun protection during outdoor activities, ensuring visitors and locals alike are prepared. As the sun shines brightly over the city, staying informed about UV levels is crucial for safety. For more details, check out the Montevideo UV Index.
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In Montevideo, Uruguay, the month of December shines the brightest, boasting an impressive 385 hours of sunshine. This surge in sunlight marks the beginning of summer, contributing to a seasonal trend where daylight hours steadily increase. Following a gradual climb from November's 342 hours, December outshines not only its predecessor but also sets a high bar for the upcoming months. As the year winds down, sunlight gradually diminishes, with January peaking at 305 hours. This pattern highlights Montevideo's vibrant and sunny atmosphere as the year wraps up, inviting residents and visitors alike to bask in the warmth before winter's return.
December in Montevideo, Uruguay, offers a promising chance of sunny weather, with a 67% likelihood of enjoying clear skies. This positivity follows a trend where late spring to early summer months, such as October and December, consistently feature higher sun probabilities, peaking at this time of year. In contrast, the months leading to December, particularly August and September, reveal a downturn in sunshine, with figures dipping as low as 38%. As the year wraps up, Montevideo transitions into sunnier days, making December an ideal time to bask in the warmth and brightness of summer approaching.
In Montevideo, Uruguay, December ushers in 14 hours of daylight, mirroring the peak daylight duration observed in January. As the year unfolds, a gradual decline in daylight occurs, starting with 13 hours in February and tapering to 10 hours during the cooler months of May and June. Following this dip, the daylight hours begin a gentle ascent, reaching back to 11 hours in September and peaking again at 14 hours by the end of the year. This cyclical pattern not only highlights the vibrant summer days of December but also reflects the distinct seasonal shifts experienced in this coastal city, making it a captivating destination for sun-seekers during the southern hemisphere's summer.
As December settles over Montevideo, the gentle breezes of summer bring an average wind speed of 6.4 m/s (14 mph), providing a refreshing contrast to the rising temperatures. Notably, this month's winds align closely with the averages seen in both January and February, creating a consistent trend of mild summer airflow that enlivens the coastal city. Transitioning from the brisker winds of spring, peaking in November at 7.1 m/s (16 mph), December marks a slight decrease yet maintains the vibrant dynamism characteristic of the region. With the winds softening, the atmosphere becomes ideal for enjoying the sunny beaches and outdoor festivities of this lively month in Montevideo.
Weather in Montevideo varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Montevideo, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January in Montevideo exhibit relatively similar weather patterns, though January tends to be slightly warmer. In December, temperatures range from a minimum of 13°C (57°F) to a maximum of 29°C (84°F), with an average of 21°C (69°F). The month sees about 61 mm (2.4 in) of precipitation over five days and a humidity level of 65%.
In contrast, January experiences slightly higher temperatures, with a minimum of 17°C (62°F), an average of 23°C (73°F), and a maximum of 31°C (87°F). Precipitation remains consistent at 61 mm (2.4 in) over five days, accompanied by a marginally higher humidity of 63%. For more detailed information, check out Montevideo weather in January.
In comparing the weather between December and February, December tends to be slightly warmer, with average temperatures ranging from a minimum of 13°C (57°F) to a maximum of 29°C (84°F), while February shows a slight increase in the minimum temperature to 16°C (62°F) but maintains the same maximum. Precipitation also sees a rise from 61 mm (2.4 in) in December to 84 mm (3.3 in) in February, alongside an increase in the number of rainy days from 5 to 9. Additionally, February exhibits a marginally higher humidity level at 69%, compared to December's 65%. For more detailed information, check out Montevideo weather in February.
In December, Montevideo enjoys warm temperatures ranging from a minimum of 13°C (57°F) to a maximum of 29°C (84°F), with an average temperature of 21°C (69°F). The month experiences moderate precipitation, totaling 61 mm (2.4 in) over about 5 days, accompanied by a humidity level of 65%. Conversely, March sees slightly higher minimum temperatures at 14°C (57°F) but maintains the same maximum of 29°C (84°F), with an average temperature of 21°C (70°F). Precipitation increases to 74 mm (2.9 in) across 7 days, and humidity rises to 73%. For more detailed insights, you can check Montevideo weather in March.
In December, Montevideo experiences warmer weather with average temperatures ranging from a minimum of 13°C (57°F) to a maximum of 29°C (84°F). Humidity levels are moderate at 65%, and precipitation is relatively light at 61 mm (2.4 in) over about 5 days. In contrast, April brings slightly cooler temperatures, with averages between 12°C (53°F) and 27°C (82°F). However, it is also wetter, receiving 87 mm (3.4 in) of rain across approximately 7 days and higher humidity at 79%. This makes April feel a bit more clammy, despite the cooler temperatures. For more detailed information, check out Montevideo weather in April.
December weather in Montevideo is generally warm and pleasant, with temperatures ranging from a minimum of 13°C (57°F) to a maximum of 29°C (84°F), and an average temperature of 21°C (69°F). There is less precipitation during this month, totaling about 61 mm (2.4 in), spread over 5 days, and humidity levels are around 65%. In contrast, May experiences cooler temperatures, with a minimum of 8°C (47°F), an average of 16°C (60°F), and a maximum of 22°C (72°F). This month also sees more precipitation at 115 mm (4.5 in) across 8 days, and higher humidity at 82%. For a detailed look at the weather specifics, you can check Montevideo weather in May.
December and June present contrasting weather patterns. In December, temperatures are generally warmer, with a minimum of 13°C (57°F) and an average high of 29°C (84°F), while June’s temperatures are notably cooler, ranging from a minimum of 7°C (44°F) to a maximum of 20°C (69°F). Additionally, December experiences less rainfall, with only 61 mm (2.4 in) over approximately 5 days, compared to June's 91 mm (3.6 in) across about 10 days, leading to higher humidity levels in June at 80%. For more details on the weather in June, you can check Montevideo weather in June.
The weather in December is generally warmer and more comfortable compared to July in Montevideo. In December, temperatures range from a minimum of 13°C (57°F) to a maximum of 29°C (84°F), with an average temperature of 21°C (69°F) and relatively low precipitation of 61 mm (2.4 in) over about 5 days. In contrast, July experiences cooler temperatures, with a minimum of 6°C (43°F) and a maximum of only 19°C (67°F), averaging just 11°C (52°F). Additionally, July sees higher precipitation levels of 122 mm (4.8 in) over approximately 10 days, accompanied by increased humidity at 72%. For more details on Montevideo's July weather, check out Montevideo weather in July.
In December, the weather is noticeably warmer, with average temperatures ranging from a minimum of 13°C (57°F) to a maximum of 29°C (84°F), while August experiences much cooler temperatures, peaking at just 19°C (67°F). December also brings more sunshine, averaging 21°C (69°F), compared to August's cooler 12°C (54°F). However, August sees slightly more precipitation, with 81 mm (3.2 in) over 8 days compared to December's 61 mm (2.4 in) over 5 days. The humidity is higher in August at 72%, as opposed to December's 65%. For detailed weather information in August, you can check Montevideo weather in August.
When comparing the weather in December and September, it's clear that December offers a warmer climate, with minimum temperatures around 13°C (57°F) and maximums reaching up to 29°C (84°F). In contrast, September tends to be cooler, with minimum temperatures dropping to 7°C (45°F) and maximums peaking at 24°C (75°F). Additionally, December experiences less rainfall, averaging 61 mm (2.4 in) over about 5 days, whereas September sees more precipitation, totaling 91 mm (3.6 in) across 8 days. Humidity levels are also lower in December at 65%, compared to 76% in September, indicating a drier feel during the summer month. For more detailed information, visit Montevideo weather in September.
In comparing the weather between December and October, December tends to be warmer with average temperatures ranging from a minimum of 13°C (57°F) to a maximum of 29°C (84°F), whereas October experiences cooler temperatures, with averages between 8°C (47°F) and 23°C (73°F). Additionally, December has lower precipitation levels at 61 mm (2.4 in) and fewer rainy days (5 days), compared to October's 85 mm (3.3 in) of rainfall over 8 days. Humidity also differs slightly, with December at 65% and October at 71%. For more specifics about October weather, you can refer to Montevideo weather in October.
In comparing the weather of December and November, December exhibits slightly warmer temperatures with an average high of 29°C (84°F) compared to November's 27°C (81°F). Additionally, December has a higher average temperature of 21°C (69°F), while November averages 19°C (66°F). Precipitation levels are marginally lower in December at 61 mm (2.4 in) over 5 days, compared to November's 66 mm (2.6 in) over 7 days. Humidity remains fairly consistent, with December at 65% and November at 68%. For more detailed insights, you can check Montevideo weather in November.
As December unfolds in Montevideo, the city experiences a delightful shift in weather, making it stand out from the cooler months. With warm temperatures averaging around 21°C (69°F) and highs reaching 29°C (84°F), this month invites both locals and visitors to enjoy outdoor activities and the vibrant beach scene. The slight increase in humidity at 65% adds a refreshing touch to the warm air, while the modest precipitation of 61 mm (2.4 in) over just a handful of days ensures that the landscape remains lush and inviting. Those looking to embrace the sunny disposition of Montevideo will find December to be a charming gateway to the summer months. For more insights on the year-round weather patterns, be sure to check out Montevideo Climate.