Viana do Castelo, Portugal Weather
- Viana do Castelo, Portugal Weather
- Current conditions
- Weather forecast
- Averages and extremes
- Yesterday's Data
- Temperature and possibility of rain in Viana do Castelo over the next 12 hours
- Temperature and possibility of rain in Viana do Castelo in the coming days
- Rainfall in Viana do Castelo in the coming days
- Viana do Castelo Weather Summary
- Weather averages by month
- Viana do Castelo's weather
- Frequently asked questions
- Comments
Current conditions
Condition: Clear Sky
Pressure: 1,017 hPa
Feel like: 20 °C
Temperature: 18°C
Cloud: 12%
Humidity: 90%
Wind: NE - 6 km/h
Visibility: 21.5 km
30 Day Averages and Extremes
- Average high 23.2°C
- Average low 15.9°C
- Hottest day 29°C (04 September 2026)
- Coldest day 0°C (26 September 2026)
- Average humidity 70.53%
- Days with precipitation 9 days
- Highest precipitation 19 mm (07 September 2026)
Yesterday's Data
- Max: 29°C
- Min: 18°C
- Total Precipitation: 0 mm
Temperature and possibility of rain in Viana do Castelo over the next 12 hours
Temperature and possibility of rain in Viana do Castelo in the coming days
Rainfall in Viana do Castelo in the coming days
Viana do Castelo Climate Summary
Viana do Castelo features a Mediterranean, warm summer (Köppen classification: Csb), with an average annual temperature of 15.89ºC (60.6ºF), which is about -0.92% lower than the national average for Portugal. Annually, the city experiences approximately 155.54 millimeters (6.12 inches) of rainfall, spread across 130.55 rainy days, accounting for 35.77% of the year.
| Longitude | 41.6918275 |
| Latitude | -8.8344101 |
| Yearly high temperature | 17.97ºC (64.35ºF) |
| Yearly low temperature | 12.46ºC (54.43ºF) |
| Hottest month | July 23.07ºC (73.53ºF) |
| Coldest month | August 16.52ºC (61.74ºF) |
| Yearly precip | 155.54mm (6.12in) |
| Days with rainfall | 130.55 days (35.77%) |
| Driest month | July (76.39%) |
| Wettest month | October (76.08%) |
Weather averages by month
| Month | High / Low (°C) | Rain |
|---|---|---|
| January | 13.12° / 8.96° | 15.36 days |
| February | 13.32° / 8.58° | 13.0 days |
| March | 14.91° / 9.33° | 14.27 days |
| April | 16.51° / 10.69° | 12.55 days |
| May | 18.85° / 12.65° | 9.64 days |
| June | 20.68° / 14.4° | 8.0 days |
| July | 23.07° / 16.32° | 4.0 days |
| August | 23.24° / 16.52° | 4.73 days |
| September | 22.63° / 16.2° | 7.0 days |
| October | 19.77° / 14.66° | 12.09 days |
| November | 15.68° / 11.46° | 15.82 days |
| December | 13.89° / 9.78° | 14.09 days |
Viana do Castelo's weather
Frequently asked questions
1. What is the hottest month in Viana do Castelo?
July has the highest average monthly temperature (daily mean of 23.07ºC) and August are the coolest (daily mean of 16.52ºC).
2. What should I wear in Viana do Castelo today?
For today's very hot weather in Viana do Castelo, with the high temperatures above 27ºC (80.6ºF), consider wearing:
- Thin, moisture-wicking socks
- Sunscreen for skin protection
- UV-protective sunglasses
- Loose and airy fabrics like linen or cotton
Temperature
Air quality
Satisfactory air quality, minimal pollution, low risk
- CO2 481
- CO 159
- NH3 1
- NO2 7
- O3 59
- PM10 9
- PM25 5
- SO2 0
- CH4 1,413