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When to go · San Juan

San Juan in January

Avoid month. Listed as a month to avoid: Dec–Feb (35–40 °C (95–104 °F) days), and the summer holiday weeks.

Key facts

Verdict
Avoid
Temperature
35°C (95°F) / 20°C (68°F)
average high / low
Rain days
4
Crowds
High
Argentina overall
Prices
High
Argentina overall

Verdict

AvoidBest and avoid months for San Juan

Listed as a month to avoid: Dec–Feb (35–40 °C (95–104 °F) days), and the summer holiday weeks.

Is another month better than January?

January is rated avoid. These months rate higher:

Weather in January

Long-term averages
  • San JuanHighs around 35 °C (95 °F), lows around 20 °C (68 °F), rain on about 4 days
  • Cuyo (Mendoza and the high Andes), Argentina · Mendoza, San Juan, Aconcaguahot

    Dry and sunny; harvest (vendimia) in March; the pass to Chile can close with snow in June–September.

Crowds and prices

Crowds · Argentina overall
High
Prices · Argentina overall
High

Argentina overall: Peak summer holidays: Patagonia at its best but booked out, Buenos Aires hot and half-empty, Northwest rainy.

High-price month: see what to book ahead.

Compare two months

Weather, crowds and prices for any two months in San Juan, side by side.

  • Verdict

    Jan: Avoid

    Mar: Great (better)

  • Daytime high

    Jan: 35 °C (95 °F)

    Mar: 31 °C (88 °F)

  • Night low

    Jan: 20 °C (68 °F)

    Mar: 16 °C (61 °F)

  • Rain days

    Jan: 4

    Mar: 3 (better)

  • Crowds

    Jan: High

    Mar: Medium

  • Prices

    Jan: High

    Mar: Medium

  • Festivals listed

    Jan: 0

    Mar: 1

January: Listed as a month to avoid: Dec–Feb (35–40 °C days), and the summer holiday weeks.

March: Inside San Juan's best window: Mar–May, Sep–Nov.

San Juan: figures are long-term averages from this guide, not a forecast.

What to pack

  • Light, breathable clothes, a sun hat and sunscreen

Build the full packing list for your trip →

Across Argentina in January →