Last updated: August 21, 2025
Mendoza, Argentina, in January offers a dynamic weather profile that mesmerizes visitors. With maximum temperatures soaring to 40°C (104°F) and an average of 26°C (80°F), the days are warm and perfect for outdoor activities. Despite the heat, the nights cool down to a comfortable minimum of 9°C (49°F), providing a refreshing end to the day. Rain is a rarity, with an average precipitation of just 27 mm (1.0 in) falling over 4 days, highlighting the region’s predominantly dry climate. With a humidity of 40%, the air feels relatively pleasant, making it an ideal time to explore the breathtaking landscapes and vibrant culture of Mendoza.
In Mendoza, Argentina, January ushers in the height of summer, with temperatures ranging dramatically from a cool 9°C (49°F) at night to scorching highs that can reach 40°C (104°F) during the day. The average daily temperature settles at a comfortable 26°C (80°F), making it an ideal time for outdoor activities and wine tasting amid Mendoza's famous vineyards. As the month progresses, the warmth begins to wane slightly in February, where nighttime lows increase to 12°C (54°F), but daytime highs remain similarly high, hinting at the region's consistent warm climate. This trend of fluctuating yet predominantly warm temperatures persists through the following months, showcasing Mendoza's dynamic climate as it transitions from the peak of summer into the more temperate fall.
In January, Mendoza experiences a moderate amount of precipitation, averaging 27 mm (1.0 in) over just 4 rainy days. This sets the stage for a dry summer, as the city typically enjoys a warm climate. As we transition into February, the rainfall increases to 44 mm (1.7 in), accompanied by 7 rainy days, indicating a brief spike in precipitation before moving toward drier months. The pattern continues with fluctuating rainfall, peaking in February and gradually decreasing toward July, when only 10 mm (0.4 in) falls across 2 days. While the early months of the year may bring some showers, Mendoza's overall annual trend showcases its predominantly arid conditions, with January standing out as a relatively dry yet crucial precursor to the seasonal shifts ahead.
In January, Mendoza experiences a relatively low humidity level of 40%, making it one of the driest months of the year. As the season progresses into February, humidity rises slightly to 46%, indicating a gradual increase in moisture as summer intensifies. This upward trend continues through March and April, where humidity levels reach 54% and 65%, respectively. Following the peak in April, humidity remains elevated but begins to stabilize, hovering around 65% in July and August. As fall approaches in September, a noticeable decrease to 51% occurs, followed by October and November, where humidity levels drop further to 49% and 44%. Finally, December concludes the year with the lowest humidity of 35%, wrapping up a year marked by a clear transition from dry summer months to more humid fall and winter conditions. This cyclical pattern highlights Mendoza's distinctly arid climate, punctuated by seasonal variations that offer a refreshing interlude during the hotter months.
In January, Mendoza, Argentina, experiences an intense UV Index of 15, categorizing exposure as extreme with a burn time of just 10 minutes. This trend of extreme UV levels continues into February with a slightly lower index of 14, but the risk remains high. By March, while the UV Index drops to 12, it still maintains the extreme classification, emphasizing the necessity for sun protection. The UV Index decreases notably in April to 8, reflecting a shift to a very high exposure category, allowing for a slightly longer burn time of 15 minutes. As the seasons progress, May and June bring a decrease to 6 and 4, respectively, indicating a transition to high and moderate levels which afford longer safekeeping times in the sun. This fluctuation continues through the winter months, eventually peaking again in October and November at 12 and 14, before hitting another high of 15 in December. With these pronounced seasonal variations, visitors are urged to stay vigilant. For more detailed information, visit Mendoza UV Index.
UV Risk Categories
In Mendoza, Argentina, January shines with 313 hours of radiant sunshine, marking the beginning of a trend that peaks later in the year. As summer progresses into February, the sunlight increases to 327 hours, and by March, the days stretch further, offering an impressive 336 hours. However, as autumn approaches in April, the sunlight dips to 284 hours. This seasonal ebb and flow follows a clear pattern, with sunshine dwindling to 265 hours in June before gradually rising again in the late winter and spring months. Notably, December culminates the year with a dazzling 397 hours of sunshine, illustrating the region's vibrant transition from the warm embraces of summer to the cooler retreat of winter. The remarkable variation in daylight hours not only enhances Mendoza's picturesque landscapes but also embodies the climatic rhythms that forge its acclaimed wine country and outdoor adventure opportunities.
In Mendoza, Argentina, **January boasts a promising 70% chance of sunny weather, setting the stage for warm summer days ideal for outdoor exploration. As the year progresses, this likelihood tends to fluctuate; February experiences a slight dip to 63%, while March continues the trend downward to 59%. However, April surprises with a rebound to 71%, showcasing the region’s unpredictable climate. The following months maintain a steady level of sunshine, with June and July peaking at a remarkable 87%, making it the sunniest time of the year. As late summer transitions into early fall, the likelihood remains high, with August at 78% and September rising to 81%, ensuring that Mendoza’s charm is brightly illuminated as the seasons change.
In Mendoza, Argentina, January shines brightly with an impressive 14 hours of daylight, inviting outdoor adventures and vibrant vineyard tours. As the month transitions to February, daylight slightly wanes to 13 hours, while March brings us down to 12 hours, signaling the end of summer. The progression into April lowers daylight further to 11 hours, followed by a steady decline into May with just 10 hours. However, as winter approaches with June, daylight dips to its lowest point at nine hours. Interestingly, daylight begins to rebound in July and August, stabilizing at 10 hours before gradually increasing again. By the time November rolls around, Mendoza enjoys 13 hours of daylight, culminating in another 14-hour stretch by December, completing a cyclical dance of light that enhances the region’s beauty throughout the year.
In January, Mendoza enjoys a gentle average wind speed of 2.7 m/s (6 mph), marking one of the breezier periods of the year. This light yet refreshing breeze tends to taper off slightly in February, with winds decreasing to 2.2 m/s (5 mph). As summer transitions into autumn, March sees a slight uptick to 2.4 m/s (5 mph), before the winds mellow through April and May, hovering around 1.9 m/s (4 mph). Interestingly, as winter approaches, the winds stabilize at 2.0 m/s (4 mph) from June to July, only to escalate again in the spring months of September and October, reaching 2.8 m/s (6 mph) and 2.9 m/s (7 mph), respectively. The year wraps up with consistent winds, maintaining a brisk pace of 2.8 m/s (6 mph) in both November and December. This rhythmic pattern of wind speeds not only contributes to Mendoza's charming climate but also enhances outdoor experiences, making it a delightful destination year-round.
Weather in Mendoza varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Mendoza, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February display notable differences in weather patterns. January typically experiences higher temperatures, with a minimum of 9°C (49°F), averaging around 26°C (80°F), and peaking at 40°C (104°F). In contrast, February sees slightly cooler temperatures, with a minimum of 12°C (54°F), an average of 24°C (76°F), and a maximum of 39°C (103°F). Additionally, February has more precipitation, totaling 44 mm (1.7 in) across 7 days, compared to January's 27 mm (1.0 in) over just 4 days. Humidity also rises in February, averaging 46% compared to January's 40%. For more specific weather information, visit Mendoza weather in February.
In January, the weather is marked by high temperatures, with a minimum of 9°C (49°F) and an average of 26°C (80°F), reaching a maximum of 40°C (104°F). The month experiences a relatively low precipitation level of 27 mm (1.0 in) over just 4 days and maintains a humidity level of 40%. In contrast, March sees cooler temperatures, with a minimum of 7°C (45°F), an average of 22°C (71°F), and a maximum of 37°C (98°F). Precipitation increases slightly to 34 mm (1.3 in) across 6 days, and the humidity rises to 54%. For more details on March weather, you can visit Mendoza weather in March.
January and April present contrasting weather patterns in Mendoza. January typically boasts high temperatures, with a minimum of 9°C (49°F) and a scorching maximum of 40°C (104°F), while April sees cooler temperatures, ranging from a minimum of 3°C (38°F) to a maximum of 34°C (94°F). Additionally, January experiences relatively low humidity at 40% and minimal precipitation of 27 mm over just 4 days, whereas April has higher humidity levels at 65% and increased rainfall, totaling 37 mm over 6 days. For more detailed insights, you can check out Mendoza weather in April.
In January, the weather tends to be hot and dry, with daytime temperatures reaching a maximum of 40°C (104°F) and averaging around 26°C (80°F). The humidity is relatively low at 40%, contributing to the arid feel, and there is minimal precipitation, averaging just 27 mm (1.0 in) over about 4 days. In contrast, May experiences much cooler temperatures, with a maximum of 26°C (80°F), but an average of only 12°C (55°F). The humidity significantly increases to 69%, and precipitation rises slightly to 31 mm (1.2 in) over 5 days, making the air feel much more damp. For more details on weather conditions in May, you can check Mendoza weather in May.
January and June present notably contrasting weather conditions. In January, temperatures soar with a minimum of 9°C (49°F) and can reach a maximum of 40°C (104°F), coupled with relatively low humidity at 40%. Despite the heat, the month sees only 27 mm (1.0 in) of precipitation over about four days. In stark contrast, June experiences much cooler temperatures, ranging from a minimum of -3°C (28°F) to a maximum of 24°C (76°F), and an average temperature of only 9°C (48°F). The month is characterized by higher humidity levels at 64% and a total precipitation of 15 mm (0.6 in) over three days. This stark difference highlights the seasonal progression from the hot summer of January to the cooler winter of June. For more details on the weather in June, you can check Mendoza weather in June.
In January, the weather in Mendoza is characterized by high temperatures, ranging from a minimum of 9°C (49°F) to a scorching maximum of 40°C (104°F), with an average temperature of 26°C (80°F). The month sees some limited rainfall, with about 27 mm (1.0 inch) of precipitation over four days and a humidity level of 40%.
In contrast, July presents a much cooler climate, featuring temperatures that range from a frigid -2°C (29°F) to a comfortable maximum of 23°C (74°F), with an average of only 8°C (47°F). The precipitation is lighter, totaling 10 mm (0.4 inch) over just two days, but the humidity is higher at 65%. For more details on the weather in July, you can check this link: Mendoza weather in July.
January and August present strikingly different weather patterns. In January, temperatures soar, with averages around 26°C (80°F) and highs reaching up to 40°C (104°F), while the humidity remains relatively low at 40%. Conversely, August experiences much cooler temperatures, with averages of 11°C (53°F) and a maximum of 31°C (89°F). Additionally, August features higher humidity levels at 60%, despite lower overall precipitation of 10 mm (0.4 in) and fewer rainy days. For more details on the weather in August, check out Mendoza weather in August.
January and September showcase a stark contrast in weather conditions. In January, temperatures soar, with averages around 26°C (80°F) but peaking at a sweltering 40°C (104°F), accompanied by relatively low humidity at 40%. In contrast, September experiences cooler temperatures with an average of 15°C (60°F) and a maximum of 34°C (94°F), alongside a higher humidity level of 51%. Precipitation is more frequent in January, with 27 mm (1.0 in) over four days, compared to September's lighter rain of 14 mm (0.6 in) over just two days. For more detailed insights, you can check Mendoza weather in September.
The January weather in Mendoza is characterized by significantly higher temperatures, with a minimum of 9°C (49°F) and an average of 26°C (80°F), reaching a scorching maximum of 40°C (104°F). In contrast, October brings cooler temperatures, with a minimum of 2°C (36°F) and an average of 18°C (66°F), peaking at 37°C (98°F). Both months experience similar levels of precipitation, with January receiving 27 mm (1.0 in) over 4 days and October slightly less at 26 mm (1.0 in) over 3 days. Additionally, October's humidity at 49% is notably higher than January's 40%, contributing to a different overall feel in the air. For more details on October weather, visit Mendoza weather in October.
In January, the weather in Mendoza features higher average temperatures, soaring up to a maximum of 40°C (104°F) with an average of 26°C (80°F), while November sees slightly cooler conditions with a maximum of 38°C (101°F) and an average of 22°C (73°F). Both months experience low precipitation, but January has less rainfall at 27 mm (1.0 in) compared to November's 31 mm (1.2 in), which occurs over a slightly longer duration of five days. Humidity levels are also marginally higher in November at 44%, compared to January's 40%. For more details about November's weather, you can check Mendoza weather in November.
In January, the weather in Mendoza showcases a warm climate with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 40°C (104°F), averaging around 26°C (80°F). This month sees light precipitation of 27 mm (1.0 in) over approximately 4 days, with humidity levels at 40%. In contrast, December experiences slightly cooler temperatures with a minimum of 11°C (52°F) and an average of 25°C (77°F), while still peaking at 40°C (104°F). December's precipitation is about 26 mm (1.0 in) spread over 5 days, and humidity is a bit lower at 35%. For more detailed information, you can explore Mendoza weather in December.
As the heart of summer, January in Mendoza showcases a striking contrast to the cooler months. With temperatures soaring to scorching highs and basking in an average warmth that entices outdoor adventurers, this month is characterized by its vibrant, sun-soaked days. While there’s a slight chance of rain, the low humidity keeps the overall atmosphere pleasant, making it a prime time for wine tours and outdoor activities. If you're planning a visit, be sure to check out Mendoza Climate for a comprehensive look at what to expect during your stay!