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Weather & Climate in Fronteira, Portugal
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Fronteira enjoys a temperate climate with an average annual temperature of 61°F (16°C). Winters average 49°F in January while summers reach 75°F in July. The area gets 290 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 25.1 inches (drier than the 38-inch national average). The city sits at an elevation of 843 feet.
Temperature
49°F Jan (9°C)
75°F Jul (24°C)
| Annual Average | 60.7°F |
| 12% above US avg | |
| January Average | 49°F (9°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 290 days/yr |
Geography
| Elevation | 843 ft (257 m) |
| Area | 69.1 sq mi (178.9 km²) |
| Population Density | 49/sq mi |
| Coordinates | 39.0563°N, 7.6487°W |
| Timezone | Europe/Lisbon |
Precipitation & Snow
Air Quality
Earthquake History
93 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.
| Feb 17, 2025 | 1 km NE of Charneca de Caparica, Portugal | M4.8 | 141 km | 10 km |
| Aug 17, 2017 | 5 km N of Arruda dos Vinhos, Portugal | M4.2 | 124 km | 10 km |
| Jan 22, 2006 | 0 km SE of Feria, Spain | M4.1 | 113 km | 11 km |
| Jan 15, 2018 | 25 km NNW of Évora, Portugal | M4.1 | 40 km | 11 km |
| Mar 27, 2010 | 13 km SE of Vale da Amoreira, Portugal | M4.1 | 10 km | 15 km |
| Sep 20, 1999 | 0 km SW of Caxias, Portugal | M3.8 | 147 km | 10 km |
| Jul 31, 1998 | 23 km W of Estremoz, Portugal | M3.8 | 28 km | 5 km |
| Mar 30, 1995 | 5 km N of Cabeza la Vaca, Spain | M3.7 | 148 km | 10 km |
| Apr 10, 2001 | 6 km SSE of Louriçal, Portugal | M3.7 | 134 km | 10 km |
| Apr 30, 1999 | 7 km WNW of Marinha Grande, Portugal | M3.6 | 142 km | 10 km |
| Feb 18, 1990 | 2 km ENE of Abrigada, Portugal | M3.6 | 116 km | 10 km |
| Sep 4, 1996 | 4 km E of Santo Isidoro, Portugal | M3.6 | 147 km | 10 km |
| Feb 1, 2017 | 4 km WSW of Porto de Mós, Portugal | M3.6 | 120 km | 11 km |
| Jan 19, 1997 | 9 km WNW of Redondo, Portugal | M3.6 | 41 km | 10 km |
| Sep 21, 1992 | 1 km N of Salvaleón, Spain | M3.5 | 96 km | 10 km |
| Feb 14, 1996 | 15 km SSW of Évora, Portugal | M3.5 | 74 km | 10 km |
| Jan 11, 2005 | 12 km WSW of Montemor-o-Novo, Portugal | M3.5 | 79 km | 0 km |
| Apr 15, 2006 | 3 km N of Bombarral, Portugal | M3.4 | 133 km | 10 km |
| Jan 24, 1997 | 6 km SSE of Valencia del Ventoso, Spain | M3.4 | 141 km | 10 km |
| Mar 18, 2021 | 0 km SSW of Santa Iria da Azóia, Portugal | M3.3 | 128 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1531 | TAGUS RIVER, LISBON | Earthquake | — | 30,000 | 132 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 49°F (9°C) | 3.4 in | Coldest |
| February | 51°F (10°C) | 2.8 in | |
| March | 54°F (12°C) | 2.3 in | |
| April | 57°F (14°C) | 2.3 in | |
| May | 62°F (17°C) | 2.0 in | |
| June | 69°F (21°C) | 0.9 in | |
| July | 75°F (24°C) | 0.2 in | Driest |
| August | 75°F (24°C) | 0.2 in | Warmest |
| September | 71°F (22°C) | 1.2 in | |
| October | 63°F (17°C) | 2.8 in | |
| November | 55°F (13°C) | 3.4 in | |
| December | 50°F (10°C) | 3.7 in | Wettest |
Fronteira has a seasonal temperature swing of 26°F / from 49°F in January to 75°F in August. Total annual precipitation is 25.1 inches, with December being the wettest month (3.7") and July the driest (0.2").