Last updated: August 21, 2025
Discover the vibrant September weather in Mendoza, Argentina, where temperatures present a captivating range: soaring up to 34°C (94°F) during the day while dropping to a cool 0°C (32°F) at night. The month enjoys an average temperature of 15°C (60°F), making it a pleasant time for outdoor adventures. Rainfall is minimal, with only 14 mm (0.6 in) recorded over just 2 days, complemented by a moderate humidity level of 51%. Whether you’re exploring the renowned vineyards or embracing the stunning landscapes, September in Mendoza offers a delightful blend of warmth and freshness.
In September, Mendoza, Argentina, experiences a delightful transition into spring, characterized by a range of temperatures that reflect the changing season. With minimums hitting around 0°C (32°F) and maximums reaching 34°C (94°F), the weather is generally mild, offering an average temperature of 15°C (60°F). This gradual warming trend from the chilly depths of winter makes September a particularly inviting time to explore the region, as the landscape bursts into vibrant hues of flora. As the month unfolds, temperatures feel increasingly pleasant, heralding the approach of summer and encouraging outdoor adventures amidst the backdrop of the Andes.
In September, Mendoza, Argentina, experiences a modest shift in precipitation as the dry winter months give way to the promise of spring. With 14 mm (0.6 in) of rainfall over just 2 days, this period marks a slight uptick compared to the drier summer months of July and August. While September's precipitation is relatively low, it sets the stage for the more abundant showers that follow in October and November. This gradual increase in moisture not only nourishes the region's vineyards but also revitalizes the landscape, making it an exciting time for both nature and local activities. As the air warms and the days lengthen, Mendoza begins to shed its winter cloak, welcoming the colors and vitality of the upcoming season.
In September, Mendoza experiences a noticeable drop in humidity, settling at 51%. This marks a shift from the higher levels observed in the preceding months, particularly the peak of 69% in May. As autumn approaches, the trend reveals a gradual decline in humidity, with September serving as a transitional month that bridges the warmer, more humid winter and the drier conditions expected in the upcoming months. This moderate humidity is coupled with pleasant temperatures, making September a delightful time to explore Mendoza's stunning landscapes and vibrant culture. The overall pattern indicates a return to drier air, with humidity figures expected to continue decreasing as the region moves into the heart of spring.
As September arrives in Mendoza, Argentina, the UV Index begins to climb, signaling a seasonal shift in sun exposure. With a UV Index of 9, categorized as very high, residents and visitors alike should be mindful, as the burn time decreases to just 15 minutes. This marks a notable increase from the cooler months of June and July, which boasted moderate UV levels, but is still a step down from the extreme readings experienced earlier in the year. As the sun strengthens in early spring, it's crucial to adopt sun-safe practices to protect your skin. For detailed information on UV exposure in Mendoza, you can visit Mendoza UV Index.
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As September rolls into Mendoza, the vibrant warmth of the sun beckons with 322 hours of sunshine, a delightful embrace following the colder months. This month serves as a gentle transition, following the peak summer sunlight of January and February, which boast over 300 hours. While September shows a slight dip from the sun-drenched days of March and October, it remains consistent, hinting at an approaching season of bountiful harvest. The trend reveals that as the year progresses, Mendoza's sunlight steadily increases, culminating in November and December, where days stretch to a brilliant 397 hours. This steady climb not only enhances the region's stunning landscapes but also invigorates its renowned vineyards, setting the stage for an unforgettable Argentine autumn.
In September, Mendoza experiences a notably high likelihood of sunny weather, with an impressive 81% chance of sunshine. This marks a transition as the region emerges from the cooler winter months and steps into the spring season, where daylight hours increase and the temperatures begin to warm. Interestingly, September's sunny prospects remain consistently strong, surpassing the early fall months such as March (59%) and October (77%). This sunny streak sets the stage for beautiful vineyard landscapes and outdoor activities, making it an ideal time for travelers and locals to enjoy the ever-brightening days in this picturesque Argentinian destination.
As September arrives in Mendoza, Argentina, the daylight hours begin a gradual shift, providing 11 hours of sunlight—a slight increase from the winter months. This transition marks the end of the cold season and hints at the warmth of spring ahead. Following the pattern established in previous months, daylight duration will continue to extend, reaching 12 hours in October, reflecting the region's characteristic seasonal rhythm. Visitors and locals alike can relish the longer days, signaling a time for outdoor explorations amidst the stunning landscapes. The journey of daylight from the shorter winter hours back to summer's peak emphasizes the vibrant life that Mendoza offers as it moves toward the brighter months ahead.
As September rolls into Mendoza, Argentina, the landscape begins to dance with the increasing vigor of the wind, reaching an average speed of 2.8 m/s (6 mph). This slight uptick from the slower summer months heralds the arrival of spring, as the breeze invigorates the vineyards, enhancing both the scent of the blooming flora and the anticipation of the upcoming harvest. Following a progressive trend, wind speeds in Mendoza steadily rise from 2.7 m/s in January to their peak of 2.9 m/s in October, suggesting a seasonal rhythm that emphasizes the region's vibrant climate. This shift not only refreshes the air but also adds a lively dynamic to the already picturesque backdrop of Mendoza, setting the stage for the exciting months ahead.
Weather in Mendoza varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Mendoza, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather patterns. In September, temperatures range from a chilly 0°C (32°F) at night to a warm 34°C (94°F) during the day, with an average of 15°C (60°F). It's relatively dry with only 14 mm (0.6 in) of precipitation over two days and humidity at 51%. In contrast, January boasts warmer conditions, with nighttime temperatures starting at 9°C (49°F) and peaking at a scorching 40°C (104°F) during the day. The average temperature is significantly higher at 26°C (80°F), and while it sees more precipitation (27 mm or 1.0 in) over four days, the humidity is lower at 40%. For more detailed insights into January weather, check out Mendoza weather in January.
September and February present distinctly different weather patterns. In September, temperatures range from a chilly minimum of 0°C (32°F) to a warm maximum of 34°C (94°F), with an average of 15°C (60°F). The month sees minimal precipitation, totaling just 14 mm (0.6 in) over 2 days, and humidity levels at around 51%. In contrast, February experiences significantly warmer temperatures, with a minimum of 12°C (54°F) and a maximum reaching up to 39°C (103°F), averaging 24°C (76°F). This month is also wetter, with 44 mm (1.7 in) of rain falling over 7 days, and a slightly lower humidity of 46%. For more details, you can explore Mendoza weather in February.
In comparing the weather between September and March, one can observe notable differences in temperature and precipitation. September exhibits a broader temperature range, with minimums dropping to 0°C (32°F) and maximums reaching up to 34°C (94°F), accompanied by relatively low precipitation of just 14 mm (0.6 in) over 2 days. In contrast, March experiences milder nights with minimum temperatures around 7°C (45°F) and warmer days averaging 22°C (71°F), peaking at 37°C (98°F). However, it also has increased precipitation, totaling 34 mm (1.3 in) across 6 days. The humidity levels are slightly higher in March, at 54%, compared to September's 51%. For more details, visit Mendoza weather in March.
When comparing the weather in September and April, we notice notable differences. September tends to be cooler, with temperatures ranging from a minimum of 0°C (32°F) to an average of 15°C (60°F) and a maximum of 34°C (94°F). In contrast, April's temperature starts at a higher minimum of 3°C (38°F) and has an average of 18°C (64°F), while it can also peak at 34°C (94°F). Precipitation is another distinguishing factor; September has relatively low rainfall at 14 mm (0.6 in) over just 2 days, whereas April sees more rain, accumulating 37 mm (1.5 in) over 6 days. Additionally, humidity levels are higher in April at 65% compared to September’s 51%. For more details on the weather specifics during this month, check out Mendoza weather in April.
In September, the weather experiences a broader temperature range, with lows reaching 0°C (32°F) and highs soaring to 34°C (94°F), resulting in an average of 15°C (60°F). This month sees relatively low precipitation at 14 mm (0.6 in) over just two days, contributing to a humidity level of 51%. In contrast, May presents a milder atmosphere, with temperatures ranging from a minimum of 1°C (34°F) to a maximum of 26°C (80°F), averaging around 12°C (55°F). Precipitation increases to 31 mm (1.2 in) across five days, raising humidity to 69%. For a closer look at the weather during this time, you can check out Mendoza weather in May.
In comparing the weather of September and June, September boasts a more varied temperature range with a minimum of 0°C (32°F), an average of 15°C (60°F), and a maximum of 34°C (94°F). In contrast, June features cooler temperatures, with a minimum recorded at -3°C (28°F) and an average of just 9°C (48°F), peaking at 24°C (76°F). Precipitation levels are fairly similar, with September receiving 14 mm (0.6 in) over 2 days, while June sees slightly more rain at 15 mm (0.6 in) over 3 days. Additionally, humidity levels are higher in June at 64%, compared to September's 51%, suggesting a drier feel to the latter month. For more detailed weather insights in June, you can check this link: Mendoza weather in June.
In comparing the weather between September and July, September clearly experiences warmer temperatures with a minimum of 0°C (32°F), an average of 15°C (60°F), and a maximum of 34°C (94°F). In contrast, July is cooler, with temperatures ranging from a minimum of -2°C (29°F) to a maximum of 23°C (74°F). Despite both months experiencing two days of precipitation, September has slightly more rainfall (14 mm or 0.6 in) compared to July's 10 mm (0.4 in). Additionally, July is characterized by higher humidity at 65%, while September has a more moderate humidity level of 51%. For a more detailed look at July weather, visit Mendoza weather in July.
In September, the weather is noticeably warmer than in August, with average temperatures rising from 11°C (53°F) in August to 15°C (60°F) in September. The maximum temperature in September reaches a sweltering 34°C (94°F), while in August, it tops out at a cooler 31°C (89°F). Precipitation is slightly higher in September with 14 mm (0.6 in) recorded, compared to 10 mm (0.4 in) in August, although both months experience rain over just two days. Humidity also decreases in September to 51%, while in August it remains higher at 60%. For a closer look at the weather conditions specific to August, you can visit Mendoza weather in August.
In September, the weather features a broader temperature range, with minimums dipping to 0°C (32°F) and maximums reaching up to 34°C (94°F), resulting in an average temperature of 15°C (60°F). Precipitation is relatively low, amounting to just 14 mm (0.6 in) over 2 days, and humidity sits at 51%. In contrast, October sees a slight rise in average temperatures to 18°C (66°F), with minimums at 2°C (36°F) and maximums pushing up to 37°C (98°F). However, October also experiences increased precipitation of 26 mm (1.0 in) over 3 days, while humidity slightly decreases to 49%. For more detailed information about October conditions, check out Mendoza weather in October.
September and November present contrasting weather patterns. In September, temperatures range from a chilly 0°C (32°F) at night to a warm 34°C (94°F) during the day, with an average of 15°C (60°F). The month tends to be drier, with only 14 mm (0.6 in) of precipitation over just 2 days and humidity levels around 51%.
In comparison, November experiences milder nights with a minimum of 9°C (48°F) and higher average temperatures reaching 22°C (73°F), peaking at 38°C (101°F). Precipitation increases to 31 mm (1.2 in), occurring over 5 days, and humidity drops slightly to 44%. For more detailed insights into the weather patterns in November, you can check Mendoza weather in November.
September weather is characterized by a broader temperature range, with minimums dropping to 0°C (32°F) and maximums reaching up to 34°C (94°F). This month experiences relatively low precipitation of 14 mm (0.6 in) over just 2 days, and humidity levels average around 51%. In contrast, December presents a warmer climate, with a minimum temperature of 11°C (52°F) and maximums escalating to 40°C (104°F). Precipitation increases to 26 mm (1.0 in) spread across 5 days, and humidity lowers to 35%. For more details on what to expect, visit Mendoza weather in December.
As September unfolds in Mendoza, the weather offers a refreshing transition into spring, characterized by milder temperatures and lower humidity compared to the sweltering summer months. With daytime highs reaching a comfortable 34°C (94°F) and nights dipping to a chilly 0°C (32°F), the month presents a delightful variability that invites outdoor activities. While precipitation is minimal, with only a couple of rainy days, the overall climate is a stark contrast to the harsher winters and hotter summer peaks. This makes September an ideal time for wine enthusiasts and nature lovers alike to explore the stunning landscapes and vibrant vineyards. For a deeper dive into Mendoza’s distinct climate patterns, be sure to check out Mendoza Climate.