Climate averages 1991–2020
Weather in Argentina in September
In September, average daytime highs across the 67 cities listed in Argentina range from 7.2°C in San Carlos de Bariloche to 28.0°C in San Ramón de la Nueva Orán. Monthly rainfall ranges from 11 mm in San Martín to 147 mm in Posadas.
Long-term climate patterns, not a forecast for a particular trip.
City by city
September in Argentina
| City | Average highHigh / low | Average low | Rainfall mm | Rain days |
|---|---|---|---|---|
| Buenos Aires | 17.3°C10.4°C | 10.4°C | 80 | 7.1 |
| Córdoba | 21.3°C9.2°C | 9.2°C | 37 | 5.6 |
| Rosario | 20.4°C10.1°C | 10.1°C | 61 | 5.8 |
| Mar del Plata | 14.7°C7.5°C | 7.5°C | 60 | 7.4 |
| Santa Fe | 21.4°C11.4°C | 11.4°C | 65 | 5.8 |
| Avellaneda | 17.5°C10.1°C | 10.1°C | 74 | 7.1 |
| Corrientes | 24.1°C14.5°C | 14.5°C | 115 | 8.3 |
| Posadas | 24.3°C15.0°C | 15.0°C | 147 | 9.8 |
| Bahía Blanca | 17.6°C8.0°C | 8.0°C | 45 | 6.2 |
| Resistencia | 24.5°C14.6°C | 14.6°C | 106 | 8.5 |
| Merlo | 18.5°C9.1°C | 9.1°C | 71 | 6.7 |
| Quilmes | 17.4°C9.9°C | 9.9°C | 74 | 7.1 |
| Santiago del Estero | 27.0°C14.9°C | 14.9°C | 28 | 3.8 |
| Laferrere | 18.3°C9.1°C | 9.1°C | 72 | 6.7 |
| Paraná | 20.8°C11.1°C | 11.1°C | 63 | 6.1 |
| Neuquén | 18.3°C6.5°C | 6.5°C | 19 | 3.5 |
| José C. Paz | 18.4°C9.1°C | 9.1°C | 72 | 6.4 |
| Formosa, Argentina | 25.8°C15.9°C | 15.9°C | 110 | 8.6 |
| La Plata | 17.0°C10.0°C | 10.0°C | 72 | 6.9 |
| Berazategui | 17.1°C10.3°C | 10.3°C | 74 | 7.1 |
| San Luis | 21.3°C9.4°C | 9.4°C | 30 | 4.6 |
| San Miguel, Argentina | 18.2°C9.3°C | 9.3°C | 72 | 6.4 |
| Ituzaingó | 24.0°C15.3°C | 15.3°C | 139 | 9.8 |
| Catamarca | 24.2°C12.3°C | 12.3°C | 32 | 5.4 |
| Río Cuarto | 20.3°C9.3°C | 9.3°C | 39 | 4.9 |
| Moreno | 18.5°C9.0°C | 9.0°C | 71 | 6.7 |
| Concordia | 20.8°C11.3°C | 11.3°C | 91 | 7.6 |
| Comodoro Rivadavia | 13.3°C6.5°C | 6.5°C | 21 | 4.4 |
| San Nicolás de los Arroyos | 20.0°C10.4°C | 10.4°C | 67 | 6.3 |
| Isidro Casanova | 18.2°C9.2°C | 9.2°C | 72 | 6.7 |
| Rawson | 21.5°C7.3°C | 7.3°C | 17 | 3.3 |
| San Rafael | 19.4°C6.3°C | 6.3°C | 28 | 4.7 |
| Tandil | 16.0°C5.8°C | 5.8°C | 59 | 7.0 |
| Ezeiza | 18.1°C9.0°C | 9.0°C | 72 | 6.7 |
| Mendoza | 18.3°C6.1°C | 6.1°C | 28 | 5.0 |
| Lomas de Zamora | 17.7°C9.6°C | 9.6°C | 72 | 6.7 |
| San Juan, Argentina | 21.8°C8.0°C | 8.0°C | 17 | 3.3 |
| Santa Rosa, Argentina | 18.9°C8.0°C | 8.0°C | 48 | 5.8 |
| Zárate | 19.0°C9.2°C | 9.2°C | 75 | 6.5 |
| Trelew | 17.3°C6.1°C | 6.1°C | 18 | 4.0 |
| Luján | 18.8°C8.8°C | 8.8°C | 71 | 6.5 |
| Villa Mercedes, Argentina | 20.9°C8.9°C | 8.9°C | 36 | 5.6 |
| Río Gallegos | 10.0°C1.4°C | 1.4°C | 21 | 6.1 |
| Cipolletti | 18.5°C6.7°C | 6.7°C | 19 | 3.5 |
| San Carlos de Bariloche | 7.2°C0.8°C | 0.8°C | 68 | 10.3 |
| Villa María | 21.0°C10.4°C | 10.4°C | 42 | 5.5 |
| Pergamino | 19.7°C9.3°C | 9.3°C | 68 | 6.2 |
| Reconquista | 23.0°C13.2°C | 13.2°C | 93 | 6.8 |
| San Vicente | 18.0°C8.6°C | 8.6°C | 72 | 7.0 |
| Olavarría | 16.8°C6.4°C | 6.4°C | 62 | 6.7 |
| Rafaela | 21.8°C11.0°C | 11.0°C | 57 | 5.7 |
| Berisso | 17.0°C10.3°C | 10.3°C | 81 | 7.1 |
| Junín | 19.2°C8.9°C | 8.9°C | 67 | 6.3 |
| San Ramón de la Nueva Orán | 28.0°C15.2°C | 15.2°C | 16 | 3.3 |
| Campana | 19.0°C9.0°C | 9.0°C | 74 | 6.6 |
| Mar del Tuyú | 13.8°C9.8°C | 9.8°C | 74 | 7.3 |
| San Martín | 21.1°C8.5°C | 8.5°C | 11 | 2.3 |
| Presidencia Roque Sáenz Peña | 26.1°C14.8°C | 14.8°C | 64 | 7.1 |
| Pilar | 18.6°C8.9°C | 8.9°C | 71 | 6.5 |
| Bella Vista | 18.4°C9.2°C | 9.2°C | 72 | 6.4 |
| Gualeguaychú | 19.7°C10.1°C | 10.1°C | 87 | 7.0 |
| Gobernador Gálvez | 20.4°C10.2°C | 10.2°C | 61 | 5.8 |
| Necochea | 14.3°C7.8°C | 7.8°C | 56 | 7.9 |
| General Roca | 18.7°C7.0°C | 7.0°C | 21 | 3.5 |
| Venado Tuerto | 20.2°C9.5°C | 9.5°C | 58 | 6.1 |
| Don Torcuato | 18.0°C9.8°C | 9.8°C | 72 | 6.4 |
| Goya | 22.9°C13.5°C | 13.5°C | 94 | 7.4 |
A rain day is a local calendar day with at least 1 mm of precipitation.