The short answer
Best months: June, July, August
Wettest months: October, November, December
Average highs run 14.4–28.2°C across the year and total rainfall is about 543 mm.
Lisbon weather by month
Averages for each calendar month over 10+ years. Green rows are the best months, red rows the wettest.
| Month | Avg high | Avg low | Rainfall | Days with rain | Cloud cover |
|---|---|---|---|---|---|
| January | 14.4°C | 8.6°C | 55.4 mm | 40% | 50.4% |
| February | 15.7°C | 9.3°C | 49.2 mm | 40.3% | 53.6% |
| March | 17.1°C | 10.1°C | 58.7 mm | 43.4% | 53.5% |
| April | 19.2°C | 11.9°C | 61.9 mm | 49.9% | 54.3% |
| May | 22.6°C | 14.3°C | 37.8 mm | 34% | 45.4% |
| June | 24.6°C | 16.2°C | 16.2 mm | 30.3% | 35.7% |
| July | 27.5°C | 17.8°C | 3.3 mm | 11.4% | 21.3% |
| August | 28.2°C | 18.3°C | 1.5 mm | 11.1% | 34.7% |
| September | 25.9°C | 17.3°C | 30.1 mm | 31.3% | 37.4% |
| October | 22.7°C | 15.5°C | 78 mm | 56.7% | 58.3% |
| November | 17.9°C | 12.1°C | 74.7 mm | 48% | 52.5% |
| December | 15.7°C | 10.2°C | 76.2 mm | 42.6% | 56.5% |
How we pick the best months: of the months with an average high between 18°C and 30°C, we take the three with the least rainfall. If fewer than three qualify, we take the three driest. This is a weather ranking only; it does not account for prices, crowds, events or air quality.
See Lisbon next to other destinations
Weather is only part of choosing a base. See the full score, compare Lisbon with other places for any month, or check a destination you are considering.
Where this data comes from
Daily weather history from the Open-Meteo archive for the coordinates of Lisbon (38.7223, -9.1393), grouped into month-of-year averages by NomadWeather. See Data Sources for details. "Days with rain" is the share of days in that month with recorded rain.