Monthly climate guide
Santa Fe weather in September
Expect warm weather in Santa Fe in September: afternoons reach about 23°C (74°F), while nights drop to around 10°C (51°F). Around 43 mm of rain falls over the month (fairly dry), and skies are a mix of sun and cloud. Daytime highs are 3°C warmer than August and 3°C cooler than October.
What stands out in September
- Just 380 km apart, but Santa Fe runs about 4°C warmer than Merlo this month.
- Seasonally, September counts as early spring in Santa Fe — the seasons are reversed south of the equator.
- Expect a big gap between day and night — about 13°C.
- Rain is well below Santa Fe's usual level (around 56% less).
Avg high
23°C
74°F
Avg low
10°C
51°F
Rainfall
43 mm
fairly dry
Humidity
69%
relative
Sky
47%
cloud · a mix of sun and cloud
Santa Fe weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 33°C / 92°F | 21°C / 69°F | 131 mm | 61% | 49% |
| February | 32°C / 89°F | 20°C / 68°F | 145 mm | 67% | 55% |
| March | 29°C / 84°F | 17°C / 62°F | 111 mm | 68% | 45% |
| April | 26°C / 78°F | 14°C / 57°F | 135 mm | 74% | 49% |
| May | 21°C / 69°F | 11°C / 51°F | 71 mm | 80% | 57% |
| June | 18°C / 65°F | 7°C / 45°F | 29 mm | 79% | 50% |
| July | 17°C / 63°F | 6°C / 43°F | 30 mm | 77% | 53% |
| August | 20°C / 69°F | 8°C / 46°F | 45 mm | 73% | 44% |
| September | 23°C / 74°F | 10°C / 51°F | 43 mm | 69% | 47% |
| October | 26°C / 79°F | 14°C / 56°F | 134 mm | 69% | 54% |
| November | 30°C / 86°F | 16°C / 61°F | 147 mm | 63% | 44% |
| December | 32°C / 90°F | 19°C / 66°F | 148 mm | 60% | 49% |
What to pack for September
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- An extra layer — evenings are noticeably cooler than afternoons
- A small travel umbrella, just in case
Is September a good time to visit Santa Fe?
Compare the months in the chart above to find your ideal window.
Best time to visit Santa Fe →Other Argentina cities in September
Cite or embed this data
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Santa Fe weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/argentina/santa-fe/september
<a href="https://weathercompare.eu/weather/argentina/santa-fe/september">Santa Fe weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/argentina/santa-fe" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Santa Fe weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/argentina/santa-fe/september">Santa Fe weather in September</a> – WeatherCompare</p>
Santa Fe in September: quick answers
Is September a good time to visit Santa Fe?
September is a reasonable time for Santa Fe: highs around 23°C and about 43 mm of rain, though not one of the three best months.
How warm is Santa Fe in September?
Average highs are about 23°C (74°F) and average lows about 10°C (51°F), based on 10 years of daily data.
Does it rain a lot in Santa Fe in September?
Santa Fe typically gets around 43 mm of rain in September — fairly dry.
Figures are long-term averages for the area around Santa Fe (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.