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Weather & Climate in Viana do Castelo, Portugal
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Viana do Castelo enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 48°F in January while summers reach 67°F in July / relatively mild seasonal variation. The area gets 225 sunny days per year, above the national average. Annual precipitation totals 61.1 inches (wetter than the 38-inch national average). The city sits at an elevation of 39 feet.
Temperature
48°F Jan (9°C)
67°F Jul (19°C)
| Annual Average | 56.6°F |
| 5% above US avg | |
| January Average | 48°F (9°C) |
| July Average | 67°F (19°C) |
| Sunny Days | 225 days/yr |
Geography
| Elevation | 39 ft (12 m) |
| Area | 0.3 sq mi (0.8 km²) |
| Population Density | 120,493/sq mi |
| Coordinates | 41.6932°N, 8.8329°W |
| Timezone | Europe/Lisbon |
Precipitation & Snow
Air Quality
Earthquake History
228 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.1.
| May 28, 1998 | 8 km W of Bande, Spain | M4.1 | 73 km | 9 km |
| May 30, 1998 | 15 km NNE of Valpaços, Portugal | M4.0 | 133 km | 0 km |
| May 20, 2001 | 10 km E of Taboada, Spain | M4.0 | 147 km | 10 km |
| Feb 1, 2008 | 89 km W of Baiona, Spain | M3.9 | 97 km | 11 km |
| Oct 6, 1997 | 9 km SSW of Castro, Spain | M3.9 | 149 km | 10 km |
| Jan 27, 2022 | 30 km W of Santa Uxía de Ribeira, Spain | M3.9 | 107 km | 10 km |
| Jul 2, 1996 | 6 km SSE of Allariz, Spain | M3.7 | 100 km | 10 km |
| Jun 12, 1998 | 6 km SW of Verea, Spain | M3.7 | 77 km | 0 km |
| Jan 21, 2002 | 21 km E of Sobreira, Portugal | M3.6 | 109 km | 7 km |
| May 24, 2004 | 4 km NNW of Nogueira de Ramuín, Spain | M3.6 | 122 km | 10 km |
| Aug 11, 1993 | 3 km SSW of Vilela, Portugal | M3.6 | 115 km | 10 km |
| Nov 22, 1990 | 4 km E of Lobios, Spain | M3.6 | 137 km | 10 km |
| Nov 24, 1993 | Portugal | M3.6 | 108 km | 10 km |
| Apr 25, 1996 | 10 km SW of Castro, Spain | M3.6 | 147 km | 10 km |
| Jun 17, 2004 | 111 km WSW of Santa Uxía de Ribeira, Spain | M3.5 | 127 km | 16 km |
| Dec 31, 1996 | 4 km N of Luso, Portugal | M3.5 | 146 km | 10 km |
| Sep 29, 1995 | 5 km SSW of Cartelle, Spain | M3.5 | 84 km | 10 km |
| Nov 22, 1995 | 2 km ENE of Laza, Spain | M3.5 | 123 km | 10 km |
| Feb 25, 2008 | 19 km WNW of Santa Uxía de Ribeira, Spain | M3.5 | 107 km | 5 km |
| May 10, 1990 | 69 km W of Gafanha da Encarnação, Portugal | M3.5 | 123 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 48°F (9°C) | 8.3 in | Coldest |
| February | 49°F (9°C) | 7.2 in | |
| March | 52°F (11°C) | 4.9 in | |
| April | 54°F (12°C) | 4.8 in | |
| May | 58°F (14°C) | 4.5 in | |
| June | 63°F (17°C) | 2.5 in | |
| July | 67°F (19°C) | 1.1 in | Warmest, Driest |
| August | 66°F (19°C) | 1.2 in | |
| September | 64°F (18°C) | 3.7 in | |
| October | 59°F (15°C) | 6.5 in | |
| November | 52°F (11°C) | 7.3 in | |
| December | 48°F (9°C) | 9.0 in | Wettest |
Viana do Castelo has a seasonal temperature swing of 19°F / from 48°F in January to 67°F in July. Total annual precipitation is 61.1 inches, with December being the wettest month (9.0") and July the driest (1.1").