The best time to visit Portugal is Jun–Sep. Month by month, the verdicts rate Mar–Dec as comfortable on both daytime heat and rainfall — 10 months in all.
Hot dry summers, wet winters
| Month | High °C | High °F | Rainy days | Verdict |
|---|---|---|---|---|
| January | 14.7 | 58 | 34% | Fair |
| February | 14.9 | 59 | 30% | Fair |
| March | 16.2 | 61 | 28% | Go |
| April | 17.2 | 63 | 30% | Go |
| May | 19.1 | 66 | 22% | Go |
| June | 21.3 | 70 | 8% | Go |
| July | 22.7 | 73 | 3% | Go |
| August | 23.3 | 74 | 4% | Go |
| September | 22.4 | 72 | 16% | Go |
| October | 20.4 | 69 | 33% | Go |
| November | 17.5 | 64 | 40% | Go |
| December | 15.5 | 60 | 36% | 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.
July is the driest month, with rain on 3% of days and daytime highs near 22.7°C (73°F). November is the wettest, at 40%. The warmest month is August at 23.3°C (74°F); the coolest is January at 14.7°C (58°F).