The best time to visit Mauritania is Dec–Jan. It is the only stretch of the year — 2 months — rated go on both daytime heat and rainfall.
Summer monsoon
| Month | High °C | High °F | Rainy days | Verdict |
|---|---|---|---|---|
| January | 28.6 | 83 | 0% | Go |
| February | 31.3 | 88 | 0% | Fair |
| March | 34.8 | 95 | 0% | Too hot |
| April | 38.3 | 101 | 1% | Too hot |
| May | 41.1 | 106 | 1% | Too hot |
| June | 42.6 | 109 | 2% | Too hot |
| July | 40.2 | 104 | 12% | Too hot |
| August | 38.4 | 101 | 34% | Too hot |
| September | 38.3 | 101 | 24% | Too hot |
| October | 37.4 | 99 | 7% | Too hot |
| November | 33.3 | 92 | 1% | Too hot |
| December | 29.6 | 85 | 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 28.6°C (83°F). August is the wettest, at 34%. The warmest month is June at 42.6°C (109°F); the coolest is January at 28.6°C (83°F). The record rules out too hot in Mar–Nov.