When to go · San Juan
San Juan, month by month
The best months for San Juan: Mar, Apr, May, Sep, Oct, Nov. Months to avoid: Jan, Feb, Dec.
Month by month
- JanuaryAvoidListed as a month to avoid: Dec–Feb (35–40 °C (95–104 °F) days), and the summer holiday weeks.Listed as a month to avoid: Dec–Feb (95–104 °F (35–40 °C) days), and the summer holiday weeks.35 °C (95 °F) / 20 °C (68 °F), 4 rain days95 °F (35 °C) / 68 °F (20 °C), 4 rain daysCrowds: High
- FebruaryAvoidListed as a month to avoid: Dec–Feb (35–40 °C (95–104 °F) days), and the summer holiday weeks.Listed as a month to avoid: Dec–Feb (95–104 °F (35–40 °C) days), and the summer holiday weeks.33 °C (91 °F) / 18 °C (64 °F), 4 rain days91 °F (33 °C) / 64 °F (18 °C), 4 rain daysCrowds: High · 1 festival or holiday
- MarchGreatInside San Juan's best window: Mar–May, Sep–Nov.31 °C (88 °F) / 16 °C (61 °F), 3 rain days88 °F (31 °C) / 61 °F (16 °C), 3 rain daysCrowds: Medium · 1 festival or holiday
- AprilGreatInside San Juan's best window: Mar–May, Sep–Nov.25 °C (77 °F) / 11 °C (52 °F), 2 rain days77 °F (25 °C) / 52 °F (11 °C), 2 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside San Juan's best window: Mar–May, Sep–Nov.21 °C (70 °F) / 6 °C (43 °F), 1 rain days70 °F (21 °C) / 43 °F (6 °C), 1 rain daysCrowds: Low
- JuneMixedOutside the best window (Mar–May, Sep–Nov). Across Argentina: Winter: El Chaltén mostly shut; good for Iguazú, Salta and whale watching at Península Valdés.17 °C (63 °F) / 2 °C (36 °F), 1 rain days63 °F (17 °C) / 36 °F (2 °C), 1 rain daysCrowds: Low
- JulyMixedOutside the best window (Mar–May, Sep–Nov). Across Argentina: Winter school holidays: ski season in Bariloche; cold and grey in Buenos Aires.17 °C (63 °F) / 0 °C (32 °F), 1 rain days63 °F (17 °C) / 32 °F (0 °C), 1 rain daysCrowds: Medium · 1 festival or holiday
- AugustMixedOutside the best window (Mar–May, Sep–Nov). Across Argentina: Late winter: Northwest dry and clear; Iguazú pleasant; Patagonia still closed for hiking.20 °C (68 °F) / 3 °C (37 °F), 1 rain days68 °F (20 °C) / 37 °F (3 °C), 1 rain daysCrowds: Low
- SeptemberGreatInside San Juan's best window: Mar–May, Sep–Nov.24 °C (75 °F) / 7 °C (45 °F), 1 rain days75 °F (24 °C) / 45 °F (7 °C), 1 rain daysCrowds: Low
- OctoberGreatInside San Juan's best window: Mar–May, Sep–Nov.28 °C (82 °F) / 11 °C (52 °F), 1 rain days82 °F (28 °C) / 52 °F (11 °C), 1 rain daysCrowds: Medium
- NovemberGreatInside San Juan's best window: Mar–May, Sep–Nov.32 °C (90 °F) / 15 °C (59 °F), 2 rain days90 °F (32 °C) / 59 °F (15 °C), 2 rain daysCrowds: Medium
- DecemberAvoidListed as a month to avoid: Dec–Feb (35–40 °C (95–104 °F) days), and the summer holiday weeks.Listed as a month to avoid: Dec–Feb (95–104 °F (35–40 °C) days), and the summer holiday weeks.34 °C (93 °F) / 18 °C (64 °F), 3 rain days93 °F (34 °C) / 64 °F (18 °C), 3 rain daysCrowds: High
Compare two months
Weather, crowds and prices for any two months in San Juan, side by side.
Verdict
Mar: Great
Apr: Great
Daytime high
Mar: 31 °C (88 °F)88 °F (31 °C)
Apr: 25 °C (77 °F)77 °F (25 °C)
Night low
Mar: 16 °C (61 °F)61 °F (16 °C)
Apr: 11 °C (52 °F)52 °F (11 °C)
Rain days
Mar: 3
Apr: 2 (better)
Crowds
Mar: Medium
Apr: Medium
Prices
Mar: Medium
Apr: Medium
Festivals listed
Mar: 1
Apr: 1
March: Inside San Juan's best window: Mar–May, Sep–Nov.
April: Inside San Juan's best window: Mar–May, Sep–Nov.
San Juan: figures are long-term averages from this guide, not a forecast.