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August is the hottest month in Lisbon, with an average high of 28°C / 83°F; January is the coldest (15°C / 59°F). November is the wettest month, averaging 123 mm / 4.8 in of precipitation.
| Month | High °C / °F | Low °C / °F | Precip mm / in | Wet days |
|---|---|---|---|---|
| Jan | 15 / 59 | 9 / 48 | 107 / 4.2 | 10 |
| Feb | 16 / 61 | 9 / 49 | 75 / 3.0 | 8 |
| Mar | 19 / 65 | 11 / 52 | 72 / 2.8 | 7 |
| Apr | 20 / 68 | 12 / 54 | 67 / 2.6 | 8 |
| May | 23 / 73 | 15 / 58 | 55 / 2.2 | 5 |
| Jun | 26 / 78 | 17 / 62 | 12 / 0.5 | 2 |
| Jul | 28 / 82 | 18 / 65 | 2 / 0.1 | 1 |
| Aug | 28 / 83 | 19 / 66 | 6 / 0.2 | 1 |
| Sep | 26 / 79 | 18 / 64 | 36 / 1.4 | 4 |
| Oct | 23 / 73 | 15 / 60 | 109 / 4.3 | 8 |
| Nov | 18 / 64 | 12 / 53 | 123 / 4.8 | 10 |
| Dec | 15 / 59 | 10 / 49 | 109 / 4.3 | 10 |
Extremes since 1900: highest 42°C / 108°F (August 4, 2018), lowest -1°C / 30°F (February 5, 1954).
Daylight lasts about 14.7 hours in June and 9.3 hours in December.
Data: Meteostat — Lisboa / Geof, 1991–2020 averages.
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