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Weather & Climate in São Luis, Portugal
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
São Luis enjoys a temperate climate with an average annual temperature of 61°F (16°C). Winters average 51°F in January while summers reach 71°F in July. The area gets 294 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 23.0 inches (drier than the 38-inch national average). The city sits at an elevation of 518 feet.
Temperature
51°F Jan (11°C)
71°F Jul (22°C)
| Annual Average | 60.8°F |
| 13% above US avg | |
| January Average | 51°F (11°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 294 days/yr |
Geography
| Elevation | 518 ft (158 m) |
| Area | 31.5 sq mi (81.5 km²) |
| Population Density | 32/sq mi |
| Coordinates | 37.7156°N, 8.6647°W |
| Timezone | Europe/Lisbon |
Precipitation & Snow
Air Quality
Earthquake History
240 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.0.
| Aug 26, 2024 | 56 km W of Sines, Portugal | M5.0 | 81 km | 7 km |
| Feb 17, 2025 | 1 km NE of Charneca de Caparica, Portugal | M4.8 | 111 km | 10 km |
| Sep 24, 1994 | 41 km SSE of Faro, Portugal | M4.3 | 140 km | 34 km |
| Nov 9, 1993 | 44 km SSE of Olhão, Portugal | M4.3 | 147 km | 29 km |
| May 27, 2005 | 26 km SSW of Carvoeiro, Portugal | M4.3 | 94 km | 34 km |
| Nov 17, 1995 | 66 km SSW of Sagres, Portugal | M4.2 | 149 km | 20 km |
| Feb 16, 1993 | 49 km SSE of Senhora da Luz, Portugal | M4.2 | 118 km | 34 km |
| Jan 15, 2018 | 25 km NNW of Évora, Portugal | M4.1 | 135 km | 11 km |
| Sep 9, 1994 | Strait of Gibraltar | M4.1 | 133 km | 33 km |
| Jan 4, 2005 | 80 km WSW of Sagres, Portugal | M4.0 | 150 km | 15 km |
| Mar 26, 2000 | 69 km SW of Sagres, Portugal | M4.0 | 145 km | 16 km |
| May 7, 2005 | 77 km WSW of Sagres, Portugal | M4.0 | 146 km | 19 km |
| Mar 6, 2005 | 61 km WSW of Sagres, Portugal | M4.0 | 127 km | 0 km |
| Jan 9, 2007 | 22 km SSW of Faro, Portugal | M4.0 | 110 km | 56 km |
| Mar 6, 2005 | 56 km S of Faro, Portugal | M3.9 | 145 km | 19 km |
| May 1, 1997 | 38 km SSE of Fuzeta, Portugal | M3.9 | 145 km | 56 km |
| Apr 14, 2008 | 45 km WNW of Vila do Bispo, Portugal | M3.8 | 87 km | 27 km |
| Sep 19, 2004 | 27 km WSW of Sagres, Portugal | M3.8 | 104 km | 0 km |
| Jul 31, 1998 | 23 km W of Estremoz, Portugal | M3.8 | 146 km | 5 km |
| Sep 20, 1999 | 0 km SW of Caxias, Portugal | M3.8 | 122 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 18.3 m (60 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1755 | LISBON | Earthquake | 18.3 m | 50,000 | 142 km |
| 1531 | TAGUS RIVER, LISBON | Earthquake | — | 30,000 | 116 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 51°F (11°C) | 3.3 in | Coldest |
| February | 52°F (11°C) | 2.7 in | |
| March | 56°F (13°C) | 1.9 in | |
| April | 58°F (14°C) | 2.1 in | |
| May | 62°F (17°C) | 1.5 in | |
| June | 67°F (20°C) | 0.6 in | |
| July | 71°F (22°C) | 0.1 in | Driest |
| August | 72°F (22°C) | 0.2 in | Warmest |
| September | 69°F (21°C) | 0.8 in | |
| October | 64°F (18°C) | 2.5 in | |
| November | 57°F (14°C) | 3.4 in | |
| December | 53°F (12°C) | 4.0 in | Wettest |
São Luis has a seasonal temperature swing of 21°F / from 51°F in January to 72°F in August. Total annual precipitation is 23.1 inches, with December being the wettest month (4.0") and July the driest (0.1").