Lisbon, Portugal Weather
Lisbon hourly forecast: next 24 hours
Today's high of 82°F (28°C) is about 3°F (2°C) above the typical September high of 79°F (26°C).
Current conditions in detail
Lisbon weather tomorrow (Wednesday, September 16)
Tomorrow in Lisbon looks sunny, with a high of 76° and an overnight low of 64°. Rain is unlikely (7% chance). Winds top out near 21 mph, and the UV index reaches 6 (high).
Lisbon 14-day forecast
About the weather in Lisbon
Lisbon runs on a dry-summer rhythm: the warmest months are also the driest. August averages 2 mm (0.1 in) while the wet season peaks in October at 3.1 inches (78 mm). Highs range from 58°F (15°C) to 83°F (28°C).
Lisbon weather: quick facts
- Hottest month: August - highs near 83°F (28°C)
- Coldest month: January - highs near 58°F (15°C)
- Decade extremes (2015-2024): 107°F (42°C) high · 35°F (2°C) low
- Wettest month: October (10 rainy days) · Sunniest: July (13.4 h sun/day)
- Climate type: Mediterranean
- Annual swing: 11°C between the average warmest and coolest month · day to night: 8°C
- Average humidity: 75%
Temperatures through the year
Precipitation concentrates in October - 3.1 inches (78 mm) on 10 days - and thins out by August. January bottoms out at 58°F (15°C) in daylight, 48°F (9°C) after dark. August is the warm end of the year, averaging 83°F (28°C) by day and 65°F (18°C) overnight. The gridded 2015-2024 daily record for this location tops out at 107°F (42°C) and bottoms at 35°F (2°C) - decade extremes, not all-time station records. July is the brightest month at 13.4 hours of sun a day, against an annual average of 10.3 - sunnier than roughly 75% of the cities we track.
Rain, sun and snow
Six of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is April through June.
Season by season
Spring (March through May)
Through spring, Lisbon is mild: 68°F (20°C) by day, 54°F (12°C) after dark, and expect showers on roughly 22 days across the season. Daylight is generous - around 11.1 hours of sun a day.
Summer (June through August)
Through summer, Lisbon settles into easy warmth: 80°F (27°C) by day, 64°F (18°C) after dark, and precipitation is sparse, near 21 mm (0.8 in) for the season. Daylight is generous - around 13.0 hours of sun a day.
Fall (September through November)
Through fall, Lisbon is pleasantly warm: 72°F (22°C) by day, 59°F (15°C) after dark, and expect showers on roughly 23 days across the season.
Winter (December through February)
Through winter, Lisbon is mild: 60°F (15°C) by day, 49°F (10°C) after dark, and expect showers on roughly 21 days across the season.
Average temperatures in Lisbon by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 58° | 48° | 8 | 2.2 in | 7.7 h/day | 81% |
| February | 61° | 49° | 6 | 1.9 in | 8.5 h/day | 78% |
| March | 63° | 51° | 9 | 2.3 in | 9.9 h/day | 75% |
| April | 67° | 54° | 9 | 2.4 in | 11.1 h/day | 75% |
| May | 73° | 58° | 4 | 1.5 in | 12.4 h/day | 70% |
| June | 77° | 62° | 4 | 0.6 in | 13.3 h/day | 71% |
| July | 82° | 65° | 1 | 0.1 in | 13.4 h/day | 68% |
| August | 83° | 65° | 1 | 0.1 in | 12.4 h/day | 68% |
| September | 79° | 64° | 4 | 1.2 in | 11.1 h/day | 71% |
| October | 73° | 60° | 10 | 3.1 in | 9.1 h/day | 76% |
| November | 65° | 54° | 10 | 2.9 in | 7.6 h/day | 81% |
| December | 61° | 51° | 7 | 3.0 in | 7.4 h/day | 83% |