Southern Chile & Patagonia has no ideal window. No month clears the bar for comfortable travel outright, but Sep–May comes closest — rated fair rather than too hot, too cold or too wet.
Wet, windy; short summer window
| Month | High °C | High °F | Rainy days | Verdict |
|---|---|---|---|---|
| January | 12.4 | 54 | 51% | Fair |
| February | 12.5 | 54 | 47% | Fair |
| March | 11.2 | 52 | 48% | Fair |
| April | 9.0 | 48 | 49% | Fair |
| May | 6.4 | 44 | 41% | Fair |
| June | 4.2 | 40 | 39% | Too cold |
| July | 3.9 | 39 | 42% | Too cold |
| August | 4.9 | 41 | 37% | Too cold |
| September | 6.9 | 44 | 37% | Fair |
| October | 8.8 | 48 | 34% | Fair |
| November | 10.3 | 51 | 42% | Fair |
| December | 11.6 | 53 | 45% | 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.
October is the driest month, with rain on 34% of days and daytime highs near 8.8°C (48°F). January is the wettest, at 51%. The warmest month is February at 12.5°C (54°F); the coolest is July at 3.9°C (39°F). The record rules out too cold in Jun–Aug.