Argentina in March: Weather, Crowds & What to Expect
Climate Map for March
Average temperature across Argentina in March.
City Weather in March
| City | High | Low | Rain | UV | Feels |
|---|---|---|---|---|---|
| Buenos Aires | 26° | 16° | 116 mm | very high | Mild |
| Córdoba, Argentina | 26° | 15° | 110 mm | very high | Mild |
| Rosario | 27° | 16° | 138 mm | very high | Mild |
| Mar del Plata | 24° | 13° | 103 mm | very high | Mild |
| San Miguel de Tucumán | 28° | 18° | 148 mm | extreme | Mild |
| Santa Fe, Argentina | 28° | 17° | 151 mm | very high | Mild |
| Posadas, Misiones | 30° | 19° | 148 mm | very high | Warm |
High / low are average daily temperatures (°C). “Feels” reflects how hot or cold it feels, allowing for humidity.
Northwest Andes (Salta, Jujuy, Quebrada de Humahuaca, Cafayate)
March brings the transition toward the long dry season; daytime warmth lingers while storms become less frequent. Salta city retains its comfortable, sunlit mornings - ideal for wine tours in Cafayate - but nights start to cool noticeably as altitude asserts itself. If you’re crossing high passes toward Chile, check road reports: spring melt and residual showers can still create potholes or rockfall on Andean foothill roads.
Mesopotamia & Northeast Rainforest (Iguazú, Misiones, Corrientes, Entre Ríos)
March ushers in marginally cooler nights but remains humid, with heavy showers still common across the region. The Paraná and Uruguay rivers are high and can overtop local banks after intense storms - Entre Ríos towns like Gualeguaychú keep a close eye on levels during this season. For travellers, the advantage is lush green forest, fewer crowds after Carnival, and excellent birdwatching as migratory species pass through.
Cuyo & Mendoza (Mendoza, San Juan, Uco Valley, Aconcagua approach)
March delivers reliably warm days and noticeably cooler nights, a pleasant balance for exploring vineyards and the foothills of the Andes. The harvest typically concludes and cultural events around Mendoza attract visitors; this is an amiable month for both city strolls and higher-elevation excursions. Watch for the Zonda - a hot, dry foehn wind that can arrive in spring and suddenly raise temperatures while lowering humidity, making conditions dusty and uncomfortable.
Pampas & Buenos Aires (Buenos Aires city, La Plata, Mar del Plata, Rosario, Tigre)
March sees a welcome easing of humidity; daytime temperatures fall into the comfortable mid-20s°C while nights remain mild. The city’s tree-lined avenues are pleasant for walking and the coast is still warm enough for swimming at Mar del Plata before autumn closes the season. Shoulder-season fares make this a good time to explore Buenos Aires’ museums and parks without the peak-summer crush.
Andean Lake District & Northern Patagonia (Bariloche, San Martín de los Andes, Neuquén, El Bolsón)
March brings a crisp edge to the air and spectacular autumn colours around Bariloche and El Bolsón as lenga and coihue turn red and gold. Rain becomes more frequent toward late month, and higher trails close earlier as daylight shortens; it’s one of the most photogenic months for drives along Route 40. Take warm layers for morning boat trips and be prepared for cooler nights that require a thermal layer.
Southern Patagonia & Tierra del Fuego (El Calafate, El Chaltén, Ushuaia, Puerto Madryn, Península Valdés)
March cools noticeably and daylight shortens; El Chaltén’s popular trails are quieter and colours in the lenga forests deepen. Storms become more frequent and evenings get distinctly colder, so overnight trekking requires warmer sleeping gear. In Península Valdés, the marine wildlife season is in full swing and sea conditions can become choppier as autumnal swells increase.