The best time to visit Northern Argentina (Salta, Iguazu) is May–Oct. Month by month, the verdicts rate Apr–Nov as comfortable on both daytime heat and rainfall — 8 months in all.
Subtropical; wet summers
| Month | High °C | High °F | Rainy days | Verdict |
|---|---|---|---|---|
| January | 23.3 | 74 | 57% | Fair |
| February | 22.4 | 72 | 57% | Fair |
| March | 21.8 | 71 | 48% | Fair |
| April | 20.7 | 69 | 23% | Go |
| May | 18.9 | 66 | 9% | Go |
| June | 18.5 | 65 | 3% | Go |
| July | 18.0 | 64 | 3% | Go |
| August | 20.0 | 68 | 4% | Go |
| September | 21.8 | 71 | 5% | Go |
| October | 24.1 | 75 | 17% | Go |
| November | 24.4 | 76 | 32% | Go |
| December | 24.7 | 76 | 48% | Fair |
Verdict combines mean daytime high with rainy-day frequency. “Rainy days” is the share of days in the month with at least 1 mm of rain.
June is the driest month, with rain on 3% of days and daytime highs near 18.5°C (65°F). January is the wettest, at 57%. The warmest month is December at 24.7°C (76°F); the coolest is July at 18.0°C (64°F).