Last updated: August 21, 2025
September in Termas de Rio Hondo, Argentina presents a diverse climate experience, highlighted by a maximum temperature reaching a sizzling 40°C (105°F), while the average hovers around a comfortable 21°C (70°F). Nights can be brisk, with temperatures dipping to a minimum of 5°C (42°F). This month sees a modest precipitation total of 18 mm (0.7 in) over the course of 3 days, offering a refreshing respite from the heat. With humidity levels sitting at 52%, visitors can expect a blend of warmth and cooler breezes, making September an intriguing time to explore the thermal wonders of this Argentine gem.
In September, Termas de Rio Hondo experiences a delightful transition into warmer temperatures, with minimum values around 5°C (42°F) and an average of 21°C (70°F). As the month progresses, residents and visitors alike can enjoy the increasing warmth, reaching a maximum of 40°C (105°F). This marks a noticeable shift from the cooler months of winter, with temperatures steadily rising from July's chilly lows of 0°C (31°F) and gradually approaching the scorching summer peaks seen in January and February. The weather in September creates a perfect backdrop for outdoor activities and soaking in the renowned thermal springs, inviting everyone to embrace both the warmth and the vibrant atmosphere of this charming Argentine destination.
In September, Termas de Rio Hondo experiences a noticeable uptick in precipitation, with 18 mm (0.7 in) of rain falling over approximately 3 days. While this amount is modest compared to the peak months earlier in the year, it marks a shift from the notably dry conditions of the previous months, particularly July and August, where record low precipitation reached just 2 mm (0.1 in) combined. This early hint of spring brings a welcome freshness to the air, subtly signaling a transition towards the wetter months ahead in October and November, where rainfall typically increases significantly. The seasonal rhythm in Termas de Rio Hondo thus underscores the region's characteristic climate, balancing periods of dryness with necessary rainfall to nourish the landscape.
In September, Termas de Rio Hondo experiences a moderate humidity level of 52%, marking a noticeable shift from the high humidity of the winter months. Following a trend of decreasing humidity through the late winter and into early spring, September provides a refreshing contrast to the preceding months, as levels rise slightly from the summer low of 42% in August. This transitional period sets the stage for the wetter months ahead, with October and November seeing humidity levels creep back up to 50% and 66%, respectively. The fluctuations in humidity create a dynamic climate that contributes to the region's unique charm and appeal.
In September, Termas de Rio Hondo experiences a notable shift as the UV Index rises to 10, categorizing it under very high exposure with a burn time of 15 minutes. This increase marks a transition from the more moderate index levels seen in the cooler months of June and July. As the region gears up for the warmer months, with October's UV Index jumping back to 13, it serves as a reminder for residents and visitors alike to remain vigilant. Emphasizing sun safety becomes essential, especially since this trend typically continues into the summer months, leading to extreme UV levels by January. For more detailed information, you can check the Termas de Rio Hondo UV Index.
UV Risk Categories
In September, Termas de Rio Hondo basks in an inviting 279 hours of sunshine, continuing the trend of abundant sunlight established in the preceding months. Following a vibrant August that recorded 302 hours of clear skies, September maintains a consistent glow before settling into the more subdued light of autumn. As the year transitions, this month stands out as part of a larger pattern where the sun shines brightly nearly all year round, particularly peaking in November with 311 hours. This delightful consistency of sunlight invites visitors to revel in outdoor activities, soak in natural hot springs, and explore the stunning landscapes that characterize this enchanting Argentine destination.
September in Termas de Rio Hondo, Argentina, offers a promising 66% chance of sunny weather, positioning it as a favorable time for outdoor activities. This figure, while slightly lower than the sun-drenched days of August at 95%, remains comfortably above the annual average and is indicative of the region's transition into spring. Following a summer peak, the likelihood of sunshine continues to maintain a solid presence into the early fall, providing visitors with plenty of opportunities to soak up the sun and enjoy the vibrant landscapes that come alive during this season. With October expecting even more sunshine at 70%, it’s clear that September is a delightful kickoff to the warmer months ahead.
As summer fades into autumn, September in Termas de Rio Hondo, Argentina, sees a stable return to 11 hours of daylight. This duration marks a slight decrease from the sun-drenched days of January and February, which bask in an abundance of 13 hours of light. However, September does not quite fall back to the shorter days of winter, as it maintains the same daylight length as August. Following this, October will bring a gradual increase, with daylight extending back to 12 hours, hinting at the seasonal transition toward longer days as spring approaches. The progression from more than 13 hours in summer to 11 hours in early autumn encapsulates the rhythmic shifts of daylight that define Termas de Rio Hondo's climate.
As September rolls into Termas de Rio Hondo, Argentina, the wind begins to pick up, heralding a noticeable shift in the season. With an average wind speed of 3.2 m/s (7 mph), September marks a transition from the milder breezes of the earlier months to a refreshing increase in airflow. This uptick in wind speed not only invigorates the atmosphere but also signals the approach of spring, as it is the highest recorded this year thus far. Following September's breezy invitation, October promises even stronger gusts at 3.4 m/s (8 mph), suggesting an invigorating trend that will envelop the region in the coming weeks. Overall, the gentle yet increasing winds of early spring create a delightful ambiance, perfect for both outdoor enthusiasts and those seeking a refreshing escape.
Weather in Termas de Rio Hondo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Termas de Rio Hondo, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January display significant differences in weather patterns. In September, temperatures range from a minimum of 5°C (42°F) to a maximum of 40°C (105°F), with an average of 21°C (70°F). The month sees relatively low precipitation at 18 mm (0.7 in) over just three days, accompanied by a humidity level of 52%. In contrast, January is much warmer, featuring minimum temperatures of 16°C (61°F) and maximums reaching 43°C (110°F), with an average temperature of 28°C (83°F). This month experiences much higher rainfall, totaling 96 mm (3.8 in) across 11 days, and a greater humidity level of 69%. For more details on January conditions, check out Termas de Rio Hondo weather in January.
September and February display distinctly different weather characteristics. In September, temperatures range from a minimum of 5°C (42°F) to a comfortable average of 21°C (70°F), with a maximum reaching up to 40°C (105°F). Rainfall is minimal, with only 18 mm (0.7 in) over just 3 days and humidity levels at 52%. In contrast, February offers warmer conditions, with minimum temperatures starting at 15°C (60°F) and an average of 26°C (80°F), peaking at 42°C (108°F). This month experiences significantly more precipitation, totaling 118 mm (4.6 in) across about 10 days, alongside increased humidity at 67%. For more details on February weather, check out Termas de Rio Hondo weather in February.
In comparing the weather between September and March, we see notable differences in both temperature and precipitation. September experiences cooler temperatures with a minimum of 5°C (42°F) and an average of 21°C (70°F), whereas March is warmer, starting at a minimum of 10°C (51°F) and averaging 25°C (77°F). Furthermore, March has a higher maximum temperature of 39°C (102°F) compared to September's peak of 40°C (105°F).
Precipitation is another standout difference; September sees only 18 mm (0.7 in) of rain over 3 days, while March is significantly wetter, with 95 mm (3.7 in) spread over 11 days. This increase in rainfall contributes to higher humidity levels in March at 69%, compared to September's 52%. For a detailed look at the weather in March specifically, you can check out Termas de Rio Hondo weather in March.
When comparing the weather in September and April, notable differences emerge. September typically experiences a wider temperature range, with minimums around 5°C (42°F) and maximums peaking at 40°C (105°F), while April sees milder temperatures, ranging from a minimum of 9°C (48°F) and a maximum of 36°C (97°F). Additionally, April is considerably wetter, with total precipitation of 78 mm (3.1 in) occurring over about 10 days, compared to September's drier conditions with only 18 mm (0.7 in) over 3 days. The humidity levels also reflect these seasonal changes, standing at 52% in September and rising significantly to 82% in April. For more details on April weather in this region, check out Termas de Rio Hondo weather in April.
When comparing the weather between September and May, we see notable differences in temperature and humidity. September experiences a wider temperature range, with minimums of 5°C (42°F) and maximums reaching a sweltering 40°C (105°F), leading to an average of 21°C (70°F). In contrast, May has slightly cooler temperatures, with a minimum of 3°C (37°F) and a maximum of 31°C (88°F), averaging 18°C (64°F). Furthermore, May tends to be wetter, receiving 40 mm (1.6 in) of precipitation over 9 days, compared to September's 18 mm (0.7 in) of rain over just 3 days. Additionally, May features higher humidity levels at 88%, making the air feel more oppressive, while September's humidity is a more comfortable 52%. For more detailed information, you can check Termas de Rio Hondo weather in May.
September weather is generally warmer and drier compared to June. While September boasts an impressive average temperature of 21°C (70°F) with daytime highs reaching up to 40°C (105°F), June is significantly cooler, with an average temperature of only 14°C (58°F) and a maximum of 31°C (87°F). Additionally, September experiences less precipitation, totaling 18 mm (0.7 in) over just 3 days, whereas June sees slightly more rain, amounting to 12 mm (0.5 in) over 4 days, but with notably higher humidity at 78%. For more details on June weather, you can check this link: Termas de Rio Hondo weather in June.
The weather in September presents a stark contrast to that in July, showcasing a significant increase in temperatures. In September, temperatures can reach a maximum of 40°C (105°F) with an average of 21°C (70°F), compared to July's maximum of 32°C (89°F) and average of 14°C (58°F). Precipitation also varies, with September receiving 18 mm (0.7 in) over three days, while July has a lighter rainfall of 7 mm (0.3 in) over just two days. Although July has a slightly higher humidity level at 55%, September's humidity of 52% is still quite noticeable. For further details on July weather, you can visit Termas de Rio Hondo weather in July.
In comparing the weather of September and August, September tends to be warmer, featuring a minimum temperature of 5°C (42°F) and an average of 21°C (70°F), with a maximum reaching up to 40°C (105°F). In contrast, August has slightly cooler temperatures, starting at a minimum of 2°C (36°F) and averaging around 17°C (64°F), peaking at 38°C (100°F). Additionally, September experiences more precipitation, with 18 mm (0.7 in) over 3 days, compared to August's lighter rainfall of just 2 mm (0.1 in) over a single day. Humidity levels also differ, with September at 52% and August at a drier 42%. For more details on August weather, you can visit Termas de Rio Hondo weather in August.
In September, temperatures in Termas de Rio Hondo range from a chilly 5°C (42°F) to a scorching 40°C (105°F), with an average of 21°C (70°F). The month sees minimal precipitation, totaling just 18 mm (0.7 in) across only three days and maintaining a humidity level of 52%. In contrast, October experiences slightly milder minimum temperatures of 9°C (49°F) and a higher average of 24°C (76°F), with maximum temperatures reaching up to 44°C (111°F). This month also brings increased rainfall, accumulating 42 mm (1.6 in) over seven days, while humidity stays relatively consistent at 50%. For more details, check Termas de Rio Hondo weather in October.
In September, the weather tends to be milder, with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 40°C (105°F), and an average of 21°C (70°F). This month sees relatively low precipitation at just 18 mm (0.7 in) over 3 days, resulting in a humidity level of 52%.
Conversely, November brings a noticeable increase in warmth, with temperatures spanning from a minimum of 12°C (54°F) to a maximum of 45°C (113°F), and an average of 26°C (80°F). However, this month is marked by a significant rise in rainfall, totaling 85 mm (3.4 in) over 9 days, accompanied by higher humidity at 66%. For more detailed information on this month's conditions, you can visit Termas de Rio Hondo weather in November.
In September, the weather is generally milder, with temperatures ranging from a minimum of 5°C (42°F) to an average of 21°C (70°F) and a maximum of 40°C (105°F). The month experiences relatively low precipitation at 18 mm (0.7 in) over just 3 days, along with a humidity level of 52%. In contrast, December brings a notable shift, with temperatures rising significantly; the minimum is 15°C (60°F), averaging 28°C (82°F), and peaking at a hot 43°C (110°F). This month also sees a substantial increase in rainfall, with 81 mm (3.2 in) across 10 days and a higher humidity of 77%. For a detailed look at what to expect, check out Termas de Rio Hondo weather in December.
As September unfolds in Termas de Rio Hondo, the weather begins to transition, offering a delightful mix of warmth and mildness. With temperatures reaching a maximum of 40°C and an average of 21°C, this month marks a notable shift toward warmer days compared to the cooler winter months. Rainfall is relatively light, with only a few days of precipitation contributing to the region's humidity of about 52%, making it a pleasant time to enjoy outdoor activities. This blend of warmth and occasional showers sets September apart, creating a vibrant atmosphere as spring approaches. For more insights on weather trends, visit Termas de Rio Hondo Climate.