When to go · San Juan
San Juan, month by month
The best months for San Juan: May, Jun, Jul, Aug, Sep, Oct. Months to avoid: Jan, Feb, Mar.
Month by month
- JanuaryAvoidListed as a month to avoid: Jan–Mar (rain, flooded salt flat and rough access roads).20 °C (68 °F) / 4 °C (39 °F), 15 rain days68 °F (20 °C) / 39 °F (4 °C), 15 rain daysCrowds: Medium
- FebruaryAvoidListed as a month to avoid: Jan–Mar (rain, flooded salt flat and rough access roads).20 °C (68 °F) / 4 °C (39 °F), 13 rain days68 °F (20 °C) / 39 °F (4 °C), 13 rain daysCrowds: High · 1 festival or holiday
- MarchAvoidListed as a month to avoid: Jan–Mar (rain, flooded salt flat and rough access roads).20 °C (68 °F) / 3 °C (37 °F), 11 rain days68 °F (20 °C) / 37 °F (3 °C), 11 rain daysCrowds: Medium · 1 festival or holiday
- AprilGoodOutside the best window (May–Oct (dry season, clearer roads)). Across Bolivia: Rains ending; fewer visitors; good value.20 °C (68 °F) / 1 °C (34 °F), 5 rain days68 °F (20 °C) / 34 °F (1 °C), 5 rain daysCrowds: Low
- MayGreatInside San Juan's best window: May–Oct (dry season, clearer roads).19 °C (66 °F) / -3 °C (27 °F), 2 rain days66 °F (19 °C) / 27 °F (-3 °C), 2 rain daysCrowds: Medium
- JuneGreatInside San Juan's best window: May–Oct (dry season, clearer roads).18 °C (64 °F) / -6 °C (21 °F), 1 rain days64 °F (18 °C) / 21 °F (-6 °C), 1 rain daysCrowds: Medium
- JulyGreatInside San Juan's best window: May–Oct (dry season, clearer roads).18 °C (64 °F) / -7 °C (19 °F), 1 rain days64 °F (18 °C) / 19 °F (-7 °C), 1 rain daysCrowds: High
- AugustGreatInside San Juan's best window: May–Oct (dry season, clearer roads).19 °C (66 °F) / -5 °C (23 °F), 2 rain days66 °F (19 °C) / 23 °F (-5 °C), 2 rain daysCrowds: High
- SeptemberGreatInside San Juan's best window: May–Oct (dry season, clearer roads).21 °C (70 °F) / -2 °C (28 °F), 3 rain days70 °F (21 °C) / 28 °F (-2 °C), 3 rain daysCrowds: Medium
- OctoberGreatInside San Juan's best window: May–Oct (dry season, clearer roads).22 °C (72 °F) / 0 °C (32 °F), 4 rain days72 °F (22 °C) / 32 °F (0 °C), 4 rain daysCrowds: Medium
- NovemberGoodOutside the best window (May–Oct (dry season, clearer roads)). Across Bolivia: Todos Santos (1–2 Nov); first rains late in the month.22 °C (72 °F) / 1 °C (34 °F), 6 rain days72 °F (22 °C) / 34 °F (1 °C), 6 rain daysCrowds: Low
- DecemberMixedOutside the best window (May–Oct (dry season, clearer roads)). Across Bolivia: Rains begin; Christmas travel; lowland roads muddy.21 °C (70 °F) / 3 °C (37 °F), 11 rain days70 °F (21 °C) / 37 °F (3 °C), 11 rain daysCrowds: Low
Compare two months
Weather, crowds and prices for any two months in San Juan, side by side.
Verdict
May: Great
Jun: Great
Daytime high
May: 19 °C (66 °F)66 °F (19 °C)
Jun: 18 °C (64 °F)64 °F (18 °C)
Night low
May: -3 °C (27 °F)27 °F (-3 °C)
Jun: -6 °C (21 °F)21 °F (-6 °C)
Rain days
May: 2
Jun: 1 (better)
Crowds
May: Medium
Jun: Medium
Prices
May: Medium
Jun: Medium
Festivals listed
May: 0
Jun: 0
May: Inside San Juan's best window: May–Oct (dry season, clearer roads).
June: Inside San Juan's best window: May–Oct (dry season, clearer roads).
San Juan: figures are long-term averages from this guide, not a forecast.