Last updated: August 28, 2025
September in Montevideo, Uruguay ushers in the early whispers of spring, characterized by mild temperatures ranging from a maximum of 24°C (75°F) to a comfortable average of 14°C (57°F), dipping to a refreshing minimum of 7°C (45°F) at night. This month experiences moderate rainfall, with a total precipitation of 91 mm (3.6 in) over approximately 8 days, contributing to a lush landscape. The air is notably humid at 76%, providing a vibrant backdrop for exploration in this captivating coastal city.
In September, Montevideo experiences a gentle transition from the chill of winter to the warmth of spring. Temperatures range from a comfortable minimum of 7°C (45°F) to a pleasant maximum of 24°C (75°F), with an average temperature settling at around 14°C (57°F). This month marks a significant increase in warmth compared to the preceding cooler months of July and August. As the city awakens to longer daylight hours, the refreshing mildness invites locals and visitors alike to enjoy outdoor activities and embrace the budding nature around them. The gradual rise in temperatures signals the onset of spring, making September an ideal time to explore the vibrant streets of Montevideo while savoring the delightful climate.
In September, Montevideo experiences an average precipitation of 91 mm (3.6 in) over 8 days, marking a continuation of the city's significant rainfall pattern that began to ramp up in late winter. This month sees a notable consistency with August's rainfall, indicating a resilient wet season that transitions gracefully into the spring. While the amounts in September are slightly lower than the peaks of July and May, they reflect the city's climatic rhythm, where rain is a regular part of the monthly forecast. As the seasons change, residents can expect refreshing showers that not only nourish the lush landscapes but also contribute to the vibrant atmosphere of this coastal city.
In September, humidity in Montevideo, Uruguay sits at a comfortable 76%, marking a slight decrease from the preceding months. As the transitional period from winter to spring, September showcases a gradual shift in moisture levels, following the high of 82% in May. The trend reveals that humidity peaks during the winter months of April and May, then gradually ebbs through the spring, with a notable dip by October when it drops to 71%. This fluctuation highlights the city's variable climate, where the incoming warmth of spring is accompanied by a notable, yet fluctuating humidity that prepares residents for the drier months ahead.
As September rolls into Montevideo, Uruguay, the UV Index stands at a notable 8, categorizing the exposure as very high with a burn time of only 15 minutes. This marks a transition from the milder winter months, where UV levels were moderate, into a season that demands more vigilance against sun exposure. The trend is clear: as spring approaches, UV levels are on the rise, edging closer to the extreme indices seen in January and February. This shift underscores the importance of proactive sun protection strategies as the weather warms up. For those planning to enjoy the outdoors, it's essential to stay informed about the changing UV levels. Explore more details on the Montevideo UV Index to better prepare for your sun-filled activities.
UV Risk Categories
As the southern hemisphere ushers in spring, September in Montevideo, Uruguay offers a delightful transition from the cooler months, boasting 263 hours of sunshine. While summer shines brightest with January's impressive 305 hours and February's 316 hours, September still enjoys a respectable glow, hinting at the warmer days ahead. The trend of declining sunlight from mid-year lows in May and June, each dipping below 240 hours, begins to reverse, signaling a gradual return to longer days. This month serves as a gentle reminder of the vibrant sunshine that will soon engulf the city, as October ramps up the brightness with 310 hours. In this coastal capital, September captures the essence of renewal, with each sunbeam energizing the spirit of Montevideo.
As September rolls into Montevideo, the likelihood of enjoying sunny weather takes a dip, with only a 38% chance of sunshine. This fall in clear skies comes after a winter season characterized by lower sunshine probabilities in June and July, where the figures lingered around 42-55%. While September isn't the sunniest month, there is a promising rise in sunlight as October approaches, with chances jumping to 67%. This trend highlights a transition from the cooler months, suggesting that although September may present more cloudy days, the anticipation of brighter weather is just around the corner, ushering in the warmer, sunnier days of spring.
As September arrives in Montevideo, Uruguay, residents can enjoy 11 hours of daylight, signaling a gentle transition from the shorter days of winter to the longer, sun-drenched days of spring. This month follows a gradual increase in daylight, peaking with 14 hours in January and tapering down to 9 hours in June. After the brief decline, September represents a resurgence of daylight, mirroring the city's awakening as spring blossoms. With each passing month, the natural light increases—11 hours in September lays the groundwork for an inviting 12 hours in October, hinting at the vibrant days ahead. This annual rhythm of daylight not only influences the daily activities of Montevideo's residents but also paints a picturesque backdrop for the seasonal changes that delight both locals and visitors alike.
As September rolls into Montevideo, a noticeable shift in the average wind speed signals the onset of spring in this vibrant coastal city. With gusts reaching 6.9 m/s (15 mph), September stands out as a month of invigorating breezes, slightly higher than the preceding months. This increase follows a summer pattern where winds consistently hovered around the mid-range, peaking in January and February at an average of 6.3 m/s (14 mph) and 6.4 m/s (14 mph), before dipping slightly in August to a calmer 4.8 m/s (11 mph). As the city embraces the warmer days ahead, September’s winds not only invigorate the atmosphere but also herald a transition towards the even breezier conditions expected in spring, culminating in November’s highest average of 7.1 m/s (16 mph). Thus, September emerges as a month that celebrates both the tranquility of lingering winter and the promise of the lively season to come.
Weather in Montevideo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Montevideo, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January offer contrasting weather conditions in Montevideo. In September, temperatures range from a cool 7°C (45°F) to a comfortable 24°C (75°F), with an average of 14°C (57°F). This month experiences 91 mm (3.6 in) of precipitation over about 8 days, accompanied by higher humidity levels at 76%. In contrast, January boasts warmer temperatures, with minimums around 17°C (62°F), averages of 23°C (73°F), and maximums reaching 31°C (87°F). Precipitation is lower in January at 61 mm (2.4 in) over just 5 days, and humidity drops to 63%. For more detailed information, check out this link: Montevideo weather in January.
When comparing the weather in September and February, one can notice a significant difference in temperatures and overall conditions. September experiences cooler temperatures, with a minimum of 7°C (45°F) and an average of 14°C (57°F), while February boasts much warmer weather, with a minimum of 16°C (62°F) and an average of 22°C (73°F). Precipitation is relatively similar, with September receiving 91 mm (3.6 in) over 8 days and February slightly less at 84 mm (3.3 in) over 9 days. Additionally, September's humidity is higher at 76%, compared to February's 69%, making February feel less muggy and more comfortable overall. For a detailed look at February weather, you can visit Montevideo weather in February.
In September, the weather tends to be cooler, with average temperatures ranging from a low of 7°C (45°F) to a maximum of 24°C (75°F), while March boasts warmer conditions, with temperatures starting at 14°C (57°F) and reaching up to 29°C (84°F). Precipitation levels are slightly higher in September, averaging 91 mm (3.6 in) over about 8 days, compared to March's 74 mm (2.9 in) across 7 days. Additionally, humidity is a bit higher in September at 76%, while March sees a humidity level of 73%. For more information, you can check Montevideo weather in March.
September and April exhibit notable differences in weather patterns. September typically has cooler temperatures, with a minimum of 7°C (45°F) and an average of 14°C (57°F), while April enjoys warmer temperatures, starting from a minimum of 12°C (53°F) and averaging 19°C (67°F). The maximum temperatures in April can reach up to 27°C (82°F), compared to September's peak of 24°C (75°F). Precipitation levels are fairly similar, with September receiving 91 mm (3.6 in) over 8 days and April slightly less at 87 mm (3.4 in) across 7 days. Additionally, humidity levels remain relatively high in both months, with September at 76% and April slightly higher at 79%. For more details on April weather, visit Montevideo weather in April.
When comparing the weather in September and May, we see some notable differences. September typically experiences slightly cooler temperatures, with an average of 14°C (57°F) compared to May's warmer average of 16°C (60°F). The maximum temperatures in September can reach up to 24°C (75°F), while May's maximum is a bit lower at 22°C (72°F). Additionally, September receives about 91 mm (3.6 in) of precipitation over 8 days, whereas May tends to be wetter, with 115 mm (4.5 in) of rain over the same number of days. Humidity levels also vary slightly, sitting at 76% in September and increasing to 82% in May. For a closer look at May weather specifics, you can check Montevideo weather in May.
In comparing the weather of September and June, notable differences in temperature and humidity emerge. September exhibits slightly warmer temperatures, with averages reaching 14°C (57°F) and a maximum of 24°C (75°F), while June cools down to an average of 13°C (55°F) and a maximum of 20°C (69°F). Both months experience the same level of precipitation at 91 mm (3.6 in), though September has slightly less rainy days, averaging around 8 days compared to June’s 10. Humidity is also marginally lower in September at 76%, compared to June’s 80%. For more details on June's climate, you can check out Montevideo weather in June.
In comparing the weather of September and July, September generally offers warmer temperatures, with a minimum of 7°C (45°F) and an average of 14°C (57°F), peaking at a maximum of 24°C (75°F). In contrast, July features slightly cooler temperatures, ranging from a minimum of 6°C (43°F) to an average of 11°C (52°F), with a maximum of 19°C (67°F). Additionally, while both months experience rainfall, September has precipitation of 91 mm (3.6 in) over 8 days, whereas July sees a higher total of 122 mm (4.8 in) over 10 days. Despite the increase in temperature, September maintains a higher humidity level at 76%, compared to July’s 72%. For those interested in more details, you can check Montevideo weather in July.
In comparing the weather between September and August, September generally presents milder temperatures with a minimum of 7°C (45°F) and an average of 14°C (57°F), compared to August's cooler minimum of 6°C (43°F) and an average of 12°C (54°F). The maximum temperature in September also reaches a comfortable 24°C (75°F), significantly higher than August's max of 19°C (67°F). While both months experience similar precipitation levels, with September receiving 91 mm (3.6 in) and August 81 mm (3.2 in), September has slightly higher humidity at 76%, compared to August's 72%. For a more detailed look at August weather, you can check Montevideo weather in August.
In September, the weather features a wider range of temperatures, with a minimum of 7°C (45°F) and a maximum of 24°C (75°F), averaging around 14°C (57°F). Precipitation is relatively high, totaling 91 mm (3.6 in) over 8 days, contributing to a humidity level of 76%. In contrast, October sees slightly warmer temperatures, with a minimum of 8°C (47°F) and an average of 16°C (61°F), while the maximum dips to 23°C (73°F). Precipitation remains consistent at 85 mm (3.3 in) over the same number of days but accompanies a lower humidity level of 71%. For more detailed information, check out Montevideo weather in October.
September weather in Montevideo is characterized by cooler temperatures, with a minimum of 7°C (45°F) and an average of 14°C (57°F), peaking at 24°C (75°F). The month experiences relatively high humidity at 76% and receives about 91 mm (3.6 in) of precipitation over 8 days. In contrast, November offers a milder climate, with a minimum of 12°C (55°F) and an average of 19°C (66°F), reaching highs of 27°C (81°F). Additionally, November sees less rainfall, totaling 66 mm (2.6 in) across 7 days, and lower humidity at 68%. For more details on November's weather, you can refer to Montevideo weather in November.
In September, the weather features cooler temperatures with a minimum of 7°C (45°F) and an average of 14°C (57°F), peaking at 24°C (75°F). This month experiences significant rainfall, with total precipitation reaching 91 mm (3.6 in) over approximately 8 days and a humidity level of 76%. In contrast, December brings warmer conditions, with temperatures ranging from a minimum of 13°C (57°F) to a maximum of 29°C (84°F) and an average of 21°C (69°F). Rainfall decreases to 61 mm (2.4 in) spread over just 5 days, accompanied by lower humidity at 65%. For more details, check out Montevideo weather in December.
As September unfolds in Montevideo, the weather begins to transition from the chilly grip of winter to the more temperate embrace of spring. With average temperatures hovering around a comfortable 14°C (57°F), the city experiences a refreshing change as the warmth gradually increases, bringing with it the promise of blooming landscapes. Although there's an average of 91 mm (3.6 in) of rain spread across about 8 days, this month typically sees a shift towards drier conditions compared to the winter months. The moderate humidity at 76% complements the crisp air, making it an invigorating time for locals and visitors alike. For those looking to explore the nuances of Montevideo’s weather patterns throughout the year, check out Montevideo Climate.