The best time to visit Guinea is Dec–Apr. Month by month, the verdicts rate Nov–May as comfortable on both daytime heat and rainfall — 7 months in all.
Summer monsoon
| Month | High °C | High °F | Rainy days | Verdict |
|---|---|---|---|---|
| January | 30.7 | 87 | 0% | Go |
| February | 30.6 | 87 | 1% | Go |
| March | 30.1 | 86 | 1% | Go |
| April | 29.8 | 86 | 10% | Go |
| May | 29.2 | 85 | 41% | Go |
| June | 27.9 | 82 | 86% | Too wet |
| July | 26.9 | 80 | 97% | Too wet |
| August | 26.5 | 80 | 98% | Too wet |
| September | 27.0 | 81 | 93% | Too wet |
| October | 27.9 | 82 | 76% | Too wet |
| November | 29.0 | 84 | 25% | Go |
| December | 30.1 | 86 | 1% | 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.
January is the driest month, with rain on 0% of days and daytime highs near 30.7°C (87°F). August is the wettest, at 98%. The warmest month is January at 30.7°C (87°F); the coolest is August at 26.5°C (80°F). The record rules out too wet in Jun–Oct.