The best time to visit Bolivia is May–Oct. Month by month, the verdicts rate Sep–Nov as comfortable on both daytime heat and rainfall — 3 months in all.
Wet season Dec–Mar
| Month | High °C | High °F | Rainy days | Verdict |
|---|---|---|---|---|
| January | 15.0 | 59 | 71% | Too wet |
| February | 14.8 | 59 | 65% | Too wet |
| March | 14.9 | 59 | 54% | Fair |
| April | 14.9 | 59 | 26% | Fair |
| May | 14.8 | 59 | 9% | Fair |
| June | 14.0 | 57 | 6% | Fair |
| July | 13.8 | 57 | 6% | Fair |
| August | 14.5 | 58 | 9% | Fair |
| September | 15.2 | 59 | 18% | Go |
| October | 15.9 | 61 | 30% | Go |
| November | 16.5 | 62 | 34% | Go |
| December | 15.7 | 60 | 58% | Too wet |
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 6% of days and daytime highs near 14.0°C (57°F). January is the wettest, at 71%. Temperature barely moves all year — just 2.7°C between the warmest and coolest months — so rainfall, not heat, decides when to go. The record rules out too wet in Dec–Feb.