The best time to visit Yucatan & the South (Cancun) is Dec–Apr. Month by month, the verdicts rate Dec–May as comfortable on both daytime heat and rainfall — 6 months in all.
Wet Jun–Oct; hurricane risk
| Month | High °C | High °F | Rainy days | Verdict |
|---|---|---|---|---|
| January | 26.4 | 80 | 35% | Go |
| February | 27.2 | 81 | 25% | Go |
| March | 28.2 | 83 | 21% | Go |
| April | 29.6 | 85 | 21% | Go |
| May | 30.4 | 87 | 37% | Go |
| June | 29.7 | 85 | 59% | Too wet |
| July | 30.1 | 86 | 60% | Too wet |
| August | 30.4 | 87 | 68% | Too wet |
| September | 29.9 | 86 | 81% | Too wet |
| October | 28.7 | 84 | 68% | Too wet |
| November | 27.5 | 82 | 46% | Fair |
| December | 26.8 | 80 | 34% | Go |
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.
March is the driest month, with rain on 21% of days and daytime highs near 28.2°C (83°F). September is the wettest, at 81%. Temperature barely moves all year — just 4.0°C between the warmest and coolest months — so rainfall, not heat, decides when to go. The record rules out too wet in Jun–Oct.