Climate averages 1991–2020
Santa Fe weather
in September.
A mild, moderately wet month: the 8th warmest and the 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Santa Fe: daytime highs average 21.4°C and nights cool to about 11.4°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 65 mm of rain on roughly 6 days, which makes September a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 52 min on an average September day.
The nearest other city in this atlas is Paraná (19 km away). In September its highs average 20.8°C, 0.5°C cooler than Santa Fe, with 63 mm of rain.
Among the 67 cities listed in Argentina, Santa Fe ranks 15th of 67 for the warmest September highs and 32nd of 67 for the driest September (rainfall, lowest first). The mean September high of those 67 cities is 19.4°C; Santa Fe is 2.0°C warmer than that mean.
From September to October, average highs rise by 2.7°C to 24.1°C, and monthly rainfall rises from 65 mm to 132 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Santa Fe climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.5°C21.2°C | 21.2°C | 112 | 8.7 | 14.014 h |
| February | 28.9°C20.3°C | 20.3°C | 120 | 8.7 | 13.213 h |
| March | 27.1°C18.6°C | 18.6°C | 138 | 8.2 | 12.312 h |
| April | 23.3°C15.4°C | 15.4°C | 114 | 8.6 | 11.311 h |
| May | 19.7°C12.3°C | 12.3°C | 74 | 6.1 | 10.511 h |
| June | 17.0°C9.4°C | 9.4°C | 44 | 5.1 | 10.110 h |
| July | 16.4°C8.2°C | 8.2°C | 37 | 4.5 | 10.310 h |
| August | 19.1°C9.4°C | 9.4°C | 48 | 4.9 | 11.011 h |
| September, selected | 21.4°C11.4°C | 11.4°C | 65 | 5.8 | 11.912 h |
| October | 24.1°C14.4°C | 14.4°C | 132 | 9.6 | 12.813 h |
| November | 26.9°C17.0°C | 17.0°C | 116 | 7.8 | 13.714 h |
| December | 29.2°C19.5°C | 19.5°C | 136 | 8.9 | 14.214 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Paraná in SeptemberArgentina · 19 kmHigh 20.8°C · Low 11.1°C · 63 mm rain
- Rafaela in SeptemberArgentina · 86 kmHigh 21.8°C · Low 11.0°C · 57 mm rain
- Rosario in SeptemberArgentina · 144 kmHigh 20.4°C · Low 10.1°C · 61 mm rain
- Gobernador Gálvez in SeptemberArgentina · 154 kmHigh 20.4°C · Low 10.2°C · 61 mm rain
- San Nicolás de los Arroyos in SeptemberArgentina · 193 kmHigh 20.0°C · Low 10.4°C · 67 mm rain
- Pergamino in SeptemberArgentina · 250 kmHigh 19.7°C · Low 9.3°C · 68 mm rain
- Villa María in SeptemberArgentina · 253 kmHigh 21.0°C · Low 10.4°C · 42 mm rain
- Gualeguaychú in SeptemberArgentina · 255 kmHigh 19.7°C · Low 10.1°C · 87 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Santa Fe) is explained once on the Santa Fe year overview and on the Sources, method and limits page.