Last updated: August 21, 2025
In September, the weather in Santa Fe, Argentina showcases a delightful transition from winter to spring. With maximum temperatures reaching 35°C (95°F) and an average of 16°C (62°F), the days are pleasantly warm, while cool nights can dip to a minimum of 2°C (35°F). Rainfall is modest, with an average total of 51 mm (2.0 in) over the month, occurring on about 5 days, contributing to a humidity level of 59% that revitalizes the landscape. This blend of warmth and refreshing moisture makes September an inviting time to explore the vibrant city and its surroundings.
In September, Santa Fe experiences the gentle transition from winter to spring, with temperatures starting to rise. The month begins with a minimum of around 2°C (35°F), gradually warming to an average of 16°C (62°F), and reaching a maximum of 35°C (95°F). This pattern signifies a clear shift from the cooler winter months, as the city enjoys more mild and pleasant days. As September progresses, it offers a delightful mix of warm afternoons and cool evenings, making it an ideal time for outdoor activities and exploring the vibrant local culture. This upward trend in temperature sets the stage for the increasingly warm months that follow, inviting residents and visitors alike to embrace the warmth of spring in Santa Fe.
In September, Santa Fe experiences a noticeable uptick in precipitation, with an average of 51 mm (2.0 in) over 5 days. This slight increase from the drier months of late winter, such as August's 27 mm, signals the transition towards spring. The pattern reflects a gradual ascent in rainfall as the region shakes off the chill of winter, leading into the wetter months ahead. With October poised to bring even higher precipitation at 108 mm (4.2 in), September acts as a gentle, refreshing prelude, hinting at the lushness to come as nature revitalizes itself.
As the seasons transition, September in Santa Fe, Argentina, experiences a modest increase in humidity at 59%, reflecting a slight uptick from the dryer months of July and August. Although this figure is lower than the peak humidity levels found in the depths of autumn and winter, which reach heights of 83% in May and 76% in April, it indicates a gradual shift towards a more humid climate as spring approaches. The humidity begins to decline again in October, suggesting a cyclical pattern where the later months of the year are consistently more humid, while the early stages of the year tend to be drier. Overall, September stands as a transitional month, marking the harmonious blend of fading winter dryness with the anticipation of spring's moisture.
In September, Santa Fe experiences a notable shift in its UV Index, climbing to 9 and falling into the very high exposure category, which mandates a burn time of only 15 minutes. This marks an increase from the somewhat milder high levels of previous months like May and August. As spring arrives, sunlight intensifies, signaling that residents and visitors should take precautions against potential skin damage. The trend from the winter months shows a steady rise in UV exposure that will continue into October, so it's essential to stay informed and protected. For detailed insights on UV levels throughout the year, explore Santa Fe UV Index.
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As September unfolds in Santa Fe, Argentina, residents and visitors alike can bask in the warmth of 278 hours of sunshine, making it a delightful transition into spring. This month’s sunshine not only holds its own but also reflects a gradual descent from the summer peaks of January and February, which each boast over 300 hours. While September's brightness is a comforting embrace after the cooler, darker winter months, it also signals the approach of even sunnier days ahead, with October showcasing a remarkable 313 hours. The overall trend reveals a landscape where light is abundant, culminating in November and December, which shine with exceptional hour counts, enhancing the city’s vibrancy as it moves deeper into the warmer season.
As summer transitions into fall, September in Santa Fe, Argentina, offers a moderate 51% chance of sunny weather. This likelihood reflects a slight dip from the peak sunshine months of July and August, which boast impressive rates of 74% and 78%, respectively. Following the warmth of winter, September tends to bring enjoyable days, but the bright skies are not guaranteed. The chance of sunshine is nearly on par with March's 48%, indicating a shift as the city gears up for the brighter October, which sees a resurgence with a 74% likelihood. Overall, while September's sun isn't a foregone conclusion, its relatively mild weather still entices those looking to soak in the early days of spring.
As September unfolds in Santa Fe, Argentina, daylight begins to shift from the shorter winter days to the more generous hours of spring. With 11 hours of daylight, September marks a subtle increase from the 10 hours experienced through the winter months of June to August. This transition signals the awakening of longer, sunnier days ahead; a pattern that continues into October and November, where daylight stretches back to 12 and ultimately 13 hours, respectively. This gradual lengthening not only enhances the beauty of the landscape but also invites more outdoor activities, allowing residents and visitors alike to relish the invigorating energy of springtime.
As September unfolds in Santa Fe, Argentina, the gentle embrace of spring brings a noticeable uptick in wind activity, with average speeds reaching 3.8 m/s (9 mph). This increase is part of a broader trend observed as the year progresses, where the winter months display milder winds averaging between 3.0 m/s and 3.4 m/s. The transition into spring soon introduces a refreshing vigor, and September's breezes continue to accelerate the rhythm of nature. Following this, a slight decrease is expected as the warmer months approach, suggesting that while September marks a peak, the city will soon settle into a milder atmospheric calm as summer looms.
Weather in Santa Fe varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Santa Fe, focusing on differences in temperature, rainfall, humidity, and UV levels.
In contrast to September, January experiences notably warmer temperatures, with a minimum of 13°C (55°F), an average of 26°C (78°F), and a maximum that can soar up to 41°C (106°F). While September sees a more moderate range, with temperatures starting at 2°C (35°F) and reaching up to 35°C (95°F), January's heat is complemented by higher precipitation levels, totaling 125 mm (4.9 in) over 7 days, compared to September's 51 mm (2.0 in) over just 5 days. Additionally, the humidity in January is slightly lower at 51%, while September maintains higher humidity levels at 59%. For a deeper look into the specifics of January weather, click here: Santa Fe weather in January.
September and February present contrasting weather patterns, highlighting the transition from early spring to late summer in Santa Fe. In September, temperatures range from a chilly 2°C (35°F) at night to a warm 35°C (95°F) during the day, with an average of 16°C (62°F). The month experiences about 51 mm (2.0 in) of precipitation over 5 days, accompanied by a humidity level of 59%. In stark comparison, February showcases a milder temperature spectrum, with nighttime lows of 11°C (51°F) and daytime highs reaching up to 37°C (98°F), averaging 24°C (76°F). This month sees slightly higher precipitation at 61 mm (2.4 in) spread over 7 days, while humidity rests at a similar 57%. For those interested in more detailed weather insights, check out Santa Fe weather in February.
In comparing the weather between September and March, we observe notable differences in temperature and precipitation patterns. September experiences a broader temperature range, with a minimum of 2°C (35°F) and a maximum of 35°C (95°F), while March has a milder minimum of 9°C (48°F) and a peak temperature reaching 36°C (97°F).
Precipitation is more abundant in March, totaling 105 mm (4.1 in) over 8 days compared to September's 51 mm (2.0 in) over just 5 days. Furthermore, March records slightly higher humidity levels at 65%, compared to September's 59%. For more detailed insights into March weather, you can check Santa Fe weather in March.
When comparing the weather in September and April, it’s clear that April typically brings milder temperatures with an average of 20°C (68°F), compared to September's average of 16°C (62°F). While both months can reach a maximum of 35°C (95°F), September starts with cooler minimum temperatures at 2°C (35°F) compared to April's minimum of 6°C (43°F). Additionally, April tends to be wetter, receiving 103 mm (4.1 in) of precipitation over about 8 days, versus September's 51 mm (2.0 in) over 5 days. The higher humidity in April at 76% compared to 59% in September also makes it feel more humid during that time. For more detailed information on April weather in Santa Fe, visit Santa Fe weather in April.
September and May exhibit notable differences in weather characteristics. In September, temperatures range from a minimum of 2°C (35°F) to a maximum of 35°C (95°F), with an average of 16°C (62°F). This month receives about 51 mm (2.0 in) of precipitation over approximately 5 days, resulting in a humidity level of 59%. In contrast, May experiences a cooler range from 1°C (34°F) to 29°C (85°F), with an average of 15°C (60°F). Precipitation is higher in May, totaling 83 mm (3.3 in) over roughly 7 days, contributing to an increased humidity level of 83%. For a more detailed look at the weather in May, you can visit Santa Fe weather in May.
September weather in Santa Fe is characterized by a broader temperature range, with minimums reaching 2°C (35°F) and maximums soaring up to 35°C (95°F), averaging around 16°C (62°F). In contrast, June experiences cooler conditions, with minimum temperatures dropping to -1°C (31°F) and maximums peaking at 27°C (81°F), averaging just 13°C (55°F). Despite both months receiving precipitation on approximately five days, September records slightly more rainfall at 51 mm (2.0 in) compared to June's 45 mm (1.8 in). Additionally, humidity levels are higher in June at 78%, compared to September's 59%. For more detailed insights, you can check Santa Fe weather in June.
In comparing the weather of September to July, we see notable differences in both temperature and precipitation. September experiences a wider temperature range with minimums of 2°C (35°F) and maximums reaching 35°C (95°F) for an average of 16°C (62°F). In contrast, July is cooler overall, with minimum temperatures dipping to -2°C (29°F) and maximum temperatures peaking at 29°C (84°F), resulting in a lower average of 12°C (53°F). Additionally, September sees slightly more precipitation at 51 mm (2.0 in) over about 5 days, compared to July's 36 mm (1.4 in) over 4 days. Humidity levels are relatively similar, with September at 59% and July at 58%. For those interested in more detailed weather patterns, you can check out Santa Fe weather in July.
September weather shows a wider temperature range compared to August, with minimums starting at 2°C (35°F) and peaking at 35°C (95°F), while August has a minimum of 0°C (32°F) and a maximum of 32°C (89°F). The average temperature in September is higher at 16°C (62°F), compared to August's 14°C (57°F). Additionally, September experiences more precipitation, with 51 mm (2.0 in) over 5 days, while August receives just 27 mm (1.1 in) over 4 days. Humidity levels also increase slightly from 54% in August to 59% in September. For more details on August weather, visit Santa Fe weather in August.
September temperatures in Santa Fe range from a chilly 2°C (35°F) at night to a warm 35°C (95°F) during the day, with an average of 16°C (62°F). The month sees about 51 mm (2.0 in) of precipitation over five days, accompanied by a humidity level of 59%. In contrast, October marks a slight rise in temperatures, with minimums of 5°C (41°F) and maximums reaching up to 37°C (100°F), while the average temperature climbs to 19°C (66°F). However, October also brings increased rainfall, totaling 108 mm (4.2 in) over eight days, but with a lower humidity of 50%. For a more detailed look at atmospheric conditions, check out Santa Fe weather in October.
In September, temperatures in Santa Fe range from a chilly minimum of 2°C (35°F) to a warm maximum of 35°C (95°F), with an average of 16°C (62°F). During this month, the city experiences about 51 mm (2.0 in) of precipitation over approximately 5 days, accompanied by a humidity level of 59%. In contrast, November brings milder temperatures, ranging from a minimum of 9°C (48°F) to a maximum of 38°C (101°F), with an average temperature of 22°C (72°F). Precipitation increases slightly to 75 mm (2.9 in) over about 6 days, while humidity decreases to 53%. For a more detailed look at the weather in November, visit Santa Fe weather in November.
In comparing the weather of September and December, a notable shift occurs in both temperature and precipitation patterns. September presents a broader temperature range, with minima plunging to 2°C (35°F) and maxima reaching up to 35°C (95°F), while December boasts milder lows of 10°C (51°F) and higher averages around 24°C (76°F), peaking at a sweltering 38°C (101°F). Precipitation increases from 51 mm (2.0 in) over 5 days in September to 97 mm (3.8 in) across 7 days in December, suggesting wetter conditions at the year's end. Humidity levels remain relatively stable, hovering around 59% in September and slightly lower at 57% in December. For more detailed insights about December weather, check out Santa Fe weather in December.
As September rolls in, Santa Fe experiences a notable shift in its weather, marking the transition into spring. The temperatures begin to warm, offering an inviting average that contrasts sharply with the cooler winter months, while the chances of rain increase, bringing forth the lushness of blooming flora. With an average humidity level that feels refreshing, this month strikes a perfect balance between warmth and moisture, creating a pleasant atmosphere for both residents and visitors. For a deeper dive into how these conditions compare and to plan your visit accordingly, explore more at Santa Fe Climate.