Viana do Alentejo, Portugal

Full City Profile

817 ft Elevation 249 meters

62°F Avg Temperature 16°C

Viana do Alentejo enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 49°F in January while summers reach 75°F in July. The area gets 322 sunny days per year. Annual precipitation totals 19.2 inches. The area receives 0.0 inches of snow annually.

Temperature

49°F Jan (10°C) 75°F Jul (24°C)

Annual Average	61.5°F
	14% above US avg
January Average	49°F (10°C)
July Average	75°F (24°C)
Sunny Days	322 days/yr

Geography

Elevation	817 ft (249 m)
Area	28.3 sq mi (73.2 km²)
Population Density	0/sq mi
Coordinates	38.3346°N, 8.0044°W
Timezone	Europe/Lisbon

Precipitation & Snow

Annual Rainfall 19.2"

50% below US avg

Snowfall 0.0"

Wettest Month (Dec) 3.80"

Driest Month (Jul) 0.10"

Air Quality

Earthquake History

140 earthquakes (M2.5+) within 150 km since 1990. Strongest: M5.0. Most recent: M2.9 on Apr 16, 2025.

Aug 26, 2024	56 km W of Sines, Portugal	M5.0	136 km
Feb 17, 2025	1 km NE of Charneca de Caparica, Portugal	M4.8	108 km
Jul 4, 1994	13 km ENE of El Cerro de Andévalo, Spain	M4.3	121 km
Aug 17, 2017	5 km N of Arruda dos Vinhos, Portugal	M4.2	122 km
Jan 15, 2018	25 km NNW of Évora, Portugal	M4.1	51 km
Mar 27, 2010	13 km SE of Vale da Amoreira, Portugal	M4.1	79 km
Jan 22, 2006	0 km SE of Feria, Spain	M4.1	128 km
Mar 26, 2011	6 km NNW of São Marcos da Serra, Portugal	M3.8	109 km
Sep 20, 1999	0 km SW of Caxias, Portugal	M3.8	118 km
Jul 31, 1998	23 km W of Estremoz, Portugal	M3.8	61 km
Sep 4, 1997	24 km WNW of Sines, Portugal	M3.7	101 km
Mar 30, 1995	5 km N of Cabeza la Vaca, Spain	M3.7	140 km
Mar 28, 2002	43 km W of Sines, Portugal	M3.7	125 km
Sep 11, 2017	5 km ESE of Lagos, Portugal	M3.6	149 km
Sep 4, 1996	4 km E of Santo Isidoro, Portugal	M3.6	138 km
Jan 19, 1997	9 km WNW of Redondo, Portugal	M3.6	50 km
Feb 18, 1990	2 km ENE of Abrigada, Portugal	M3.6	125 km
Jan 6, 2007	36 km SSW of Cascais, Portugal	M3.6	144 km
Oct 24, 1995	6 km NW of Porto Covo, Portugal	M3.5	88 km
Jan 11, 2005	12 km WSW of Montemor-o-Novo, Portugal	M3.5	40 km

Source: USGS (M2.5+, 1990–2025)

Tsunami History

1 tsunami recorded within 500 km.

Year	Location	Cause	Max Wave	Deaths	Distance
1531	TAGUS RIVER, LISBON	Earthquake	—	30,000	104 km

Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	49°F (10°C)	3.2 in	Coldest
February	51°F (11°C)	2.4 in
March	55°F (13°C)	1.7 in
April	57°F (14°C)	2.3 in
May	63°F (17°C)	1.8 in
June	70°F (21°C)	0.8 in
July	75°F (24°C)	0.1 in	Warmest, Driest
August	75°F (24°C)	0.2 in
September	71°F (22°C)	1.0 in
October	64°F (18°C)	2.4 in
November	56°F (13°C)	2.9 in
December	51°F (11°C)	3.8 in	Wettest

Viana do Alentejo has a seasonal temperature swing of 26°F / from 49°F in January to 75°F in July. Total annual precipitation is 22.6 inches, with December being the wettest month (3.8") and July the driest (0.1").

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