Last updated: August 21, 2025
In September, Mar del Plata, Argentina experiences a mild transition into spring, with maximum temperatures reaching around 21°C (70°F) and average lows of approximately 4°C (39°F). The overall monthly average settles at a comfortable 11°C (52°F), appealing to both locals and tourists alike. With precipitation totals around 60 mm (2.4 in) over the course of about 7 days, the city's humidity hovers at a notable 79%, adding a refreshing touch to the coastal atmosphere. This month is perfect for enjoying the early blooms and vibrant sea views while basking in the charm of this beautiful Argentinian destination.
September in Mar del Plata, Argentina, marks the transition into spring, with temperatures gradually warming as summer approaches. The minimum temperatures settle around 4°C (39°F), offering a crisp start to the month, while average highs reach a comfortable 21°C (70°F). This time of year sees a refreshing climb from the cooler winter months, as the city’s charm begins to bloom. The range from 4°C to 21°C showcases a delightful increase in warmth, making it ideal for outdoor activities while still keeping the vestiges of spring's freshness. As September unfolds, the coast of Mar del Plata invites visitors to enjoy the emerging warmth and vibrant hues of the season.
In September, Mar del Plata experiences a notable shift in precipitation patterns, with 60 mm (2.4 in) of rain falling over an average of 7 days. This month marks a transition, as it sits comfortably between the heavier deluges of late winter and the more variable spring conditions ahead. Compared to the summer and early autumn months, September's rainfall is moderate, reflecting a balance that prepares the region for the upcoming October rains, which typically bring 84 mm (3.3 in). The steady precipitation acts as a gentle reminder of the changing seasons, fostering the lush landscapes that characterize this coastal paradise.
As September settles in Mar del Plata, the city experiences a notable humidity level of 79%, keeping in line with the trend of the previous months that showcase a gradual increase from the spring's approach. The humidity has remained consistently high over the late winter and early spring months, peaking in April and May. Interestingly, this September level mirrors the humidity recorded in both April and June, suggesting a stable atmospheric condition as the region transitions into warmer weather. With the following months expected to bring a slight decrease, September stands out as a month of equilibrium, offering a taste of the coming warmth while retaining the moisture of the preceding seasons.
In September, Mar del Plata experiences a noticeable uptick in the UV Index, reaching 7 and sliding into the high exposure category, which signals a more substantial risk for skin damage with a burn time of just 25 minutes. This shift from the moderate levels seen in the previous months highlights the gradual transition towards summer, as sunlight becomes increasingly intense. With the UV Index fluctuating from extremes in January and February—peaking at 14—down to a mild 3 during the winter months, September serves as a reminder to protect your skin as outdoor activities begin to ramp up. As the days lengthen and the sun strengthens, staying informed about UV levels becomes essential for safe enjoyment of the great outdoors. For more detailed information on UV trends, check out Mar del Plata UV Index.
UV Risk Categories
As September arrives in Mar del Plata, a delightful shift in sunshine marks the transition into spring. With 259 hours of bright daylight, this month serves as a charming interlude between the cooler winter months and the sun-drenched days of summer. While September offers fewer hours than its predecessors, it blossoms after a long stretch of winter, hinting at the vibrant months ahead. The sunshine begins to ascend again, leading into October's impressive 312 hours and November's peak of 331 hours. The upward trend not only brings warmth but also invites locals and tourists alike to enjoy the coastal beauty as the days grow longer and more inviting.
In Mar del Plata, September brings a 43% chance of sunny weather, positioning it as a transitional month between the cooler winter and the warmer spring months. As we look at the trends throughout the year, it's notable that September's likelihood of sunshine is lower than the vibrant summer months of January and February, where the sun shines more than half the time. However, this percentage starts to gain momentum, aligning closely with October's 64% chance, indicating that the city's sunny disposition is on the rise as spring unfolds. While September may not boast the sunniest skies, it's a step towards the brighter days that eagerly await just around the corner.
In September, Mar del Plata experiences a delightful transition as daylight returns to 11 hours, a refreshing increase from the shorter days of winter. This trend marks the awakening of spring in the region, where daylight gradually expands after the 9-hour depths of June and July. As the months progress into October, daylight continues to grow, reaching 13 hours, propelling the city toward the longer, sun-drenched days of summer, peaking in December with 14 hours of glorious daylight. This ebb and flow of sunlight not only enhances the beauty of the coastal landscapes but also invites both locals and tourists to indulge in outdoor activities as nature blossoms anew.
As September heralds the arrival of spring in Mar del Plata, the city experiences a refreshing shift in the winds, with an average speed of 5.5 m/s (12 mph). This mild breeze is both invigorating and essential for the area's coastal charm, setting the stage for warmer days ahead. Interestingly, September’s winds are a slight increase from the 4.8 m/s (11 mph) recorded in August, after which the wind dynamics gradually stabilize around 5.2 to 6.3 m/s (12-14 mph) for the ensuing months. This trend reflects the transitional nature of early spring, where gentle gusts lay the groundwork for the more robust winds typical of late spring and early summer, inviting locals and visitors alike to embrace the vibrant coastal lifestyle.
Weather in Mar del Plata varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Mar del Plata, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather patterns. In September, temperatures range from a chilly minimum of 4°C (39°F) to a comfortable maximum of 21°C (70°F), with an average of 11°C (52°F). This month sees around 60 mm (2.4 in) of precipitation over approximately 7 days, coupled with a relatively high humidity level of 79%. In stark contrast, January offers much warmer temperatures, with a minimum of 11°C (53°F) and a soaring maximum of 34°C (93°F), averaging 21°C (69°F). Precipitation is lower in January at 41 mm (1.6 in) over just 5 days, and humidity drops slightly to 71%. For more detailed information, you can refer to Mar del Plata weather in January.
In September, the weather features a cooler temperature range with a minimum of 4°C (39°F) and a maximum of 21°C (70°F), averaging around 11°C (52°F). The month sees about 60 mm (2.4 in) of precipitation spread over 7 days, accompanied by a relatively high humidity of 79%.
Conversely, February offers significantly warmer conditions, with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 30°C (87°F), averaging 20°C (69°F). This month experiences higher precipitation at 108 mm (4.2 in) over 10 days, but slightly lower humidity at 76%. For a detailed overview of the weather in February, you can check Mar del Plata weather in February.
When comparing the weather in September and March, it's clear that March experiences warmer temperatures overall. September has a temperature range from a chilly 4°C (39°F) to a comfortable 21°C (70°F), while March boasts a minimum of 9°C (49°F) and peaks at a much warmer 28°C (82°F). Additionally, March tends to be wetter, with 90 mm (3.5 in) of precipitation over 9 days, compared to September's 60 mm (2.4 in) over 7 days. Humidity levels remain relatively similar, with September at 79% and March slightly lower at 76%. For more specific details on March weather, you can check out Mar del Plata weather in March.
When comparing the weather in September and April, there's a noticeable difference in temperatures and precipitation. September typically features cooler temperatures, with a minimum of 4°C (39°F) and an average of 11°C (52°F), while April is generally warmer, with a minimum of 9°C (48°F) and an average of 17°C (62°F). Additionally, April sees higher maximum temperatures, reaching up to 25°C (78°F) compared to September's maximum of 21°C (70°F). Precipitation levels are also higher in April, with an average of 91 mm (3.6 in) over 8 days, in contrast to September's 60 mm (2.4 in) over 7 days. Both months maintain a similar humidity level of 79%. To learn more about April weather specifically, you can check out Mar del Plata weather in April.
When comparing the weather in September and May, we see some subtle differences. September typically has a slightly cooler average temperature, with daily highs reaching up to 21°C (70°F) compared to May's maximum of 22°C (72°F). Both months experience similar amounts of precipitation, with September receiving 60 mm (2.4 in) and May having 53 mm (2.1 in), and both see rainfall on about 7 days. Additionally, humidity levels remain quite high in both months, around 79% in September and 80% in May. For more details on May weather, you can visit Mar del Plata weather in May.
When comparing the weather in September and June, we see some notable similarities and differences. Both months have an average temperature of 11°C (52°F), but September tends to feel slightly warmer, with maximum temperatures reaching up to 21°C (70°F) compared to June's 19°C (67°F). Precipitation levels are quite similar, with September receiving 60 mm (2.4 in) over about 7 days and June slightly more at 63 mm (2.5 in) over 8 days. Humidity remains consistent at 79% in both months, contributing to a generally cool and damp climate. For those looking to explore more about June weather, you can find additional details here: Mar del Plata weather in June.
When comparing the weather in September to July, September generally offers milder temperatures. It has a minimum temperature of 4°C (39°F) and an average of 11°C (52°F), peaking at a comfortable 21°C (70°F). In contrast, July experiences slightly cooler temperatures, with a minimum of 2°C (36°F) and an average of 9°C (49°F), reaching a maximum of 18°C (65°F). Precipitation levels are also comparable, with September receiving 60 mm (2.4 in) over 7 days, while July sees a bit more rainfall at 72 mm (2.8 in) over 10 days. Additionally, humidity is slightly higher in September at 79%, compared to July's 74%. For more details on July weather, visit Mar del Plata weather in July.
In comparing the weather between September and August, September showcases slightly milder temperatures, with a minimum of 4°C (39°F) and an average of 11°C (52°F), reaching up to a maximum of 21°C (70°F). In contrast, August has a lower minimum of 2°C (36°F) and averages 10°C (50°F), peaking at 20°C (68°F). Additionally, September experiences increased precipitation at 60 mm (2.4 in) over 7 days, compared to 49 mm (1.9 in) in August, which also had precipitation over 7 days. Humidity levels are a bit higher in September at 79%, while August sits at 75%. For more detailed information on August weather, you can check Mar del Plata weather in August.
September marks a transition into fall with cooler temperatures, averaging around 11°C (52°F) and reaching a maximum of 21°C (70°F). The month typically sees 60 mm (2.4 in) of precipitation over 7 days, along with relatively high humidity at 79%. In contrast, October brings slightly warmer conditions, with an average temperature of 13°C (56°F) and highs hitting 25°C (78°F). However, it also sees an increase in precipitation to 84 mm (3.3 in) over 9 days, while humidity remains relatively stable at 76%. For more detailed weather insights, you can check Mar del Plata weather in October.
In September, the weather is cooler with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 21°C (70°F), and an average of 11°C (52°F). It experiences about 60 mm (2.4 in) of precipitation over 7 days, coupled with a relatively high humidity of 79%. In contrast, November boasts warmer temperatures, with a minimum of 8°C (46°F), an average of 16°C (61°F), and a maximum of 27°C (81°F). The month sees slightly increased precipitation at 70 mm (2.7 in) over 9 days, but notably lower humidity levels at 74%. For more detailed information, you can check Mar del Plata weather in November.
In September, the weather typically features cooler temperatures, with a minimum of 4°C (39°F) and an average of 11°C (52°F), peaking at a maximum of 21°C (70°F). This month receives about 60 mm (2.4 in) of precipitation over approximately 7 days, and the humidity is relatively high at 79%.
In contrast, December presents a warmer climate, with temperatures ranging from a minimum of 8°C (46°F) to an average of 18°C (65°F), and reaching a maximum of 31°C (88°F). Precipitation slightly increases to 67 mm (2.6 in) over about 9 days, but humidity drops to a more comfortable 70%. For more details on the December weather, you can check Mar del Plata weather in December.
As September rolls in, Mar del Plata transforms with a pleasant yet crisp atmosphere, setting it apart from the warmer summer months. The average temperature sees a notable dip, offering cooler days that invite cozy outfits and scenic coastal walks. While the city experiences a moderate amount of rain during this time, humidity levels can be a touch higher, adding a refreshing feel to the air. This unique blend of cool temperatures and occasional rain makes September an ideal month for exploring the city's rich culture and vibrant coastline, away from the bustling summer crowds. For more insights on seasonal variations, check out the detailed Mar del Plata Climate.