Climate Overview
The climate in Viseu is hot. The average annual temperature is 34°C and approximately 79mm of precipitation falls per year. November is the wettest month, receiving around 33mm of rainfall. Viseu sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Temperatures in Viseu vary considerably across the year, with a 21°C difference between the coldest and warmest months. February is the hottest month, with daytime highs reaching 45°C and an average of 40°C. April is the coolest month, with minimum temperatures around 24°C and an average of 31°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 5°C shift in average temperatures.
Precipitation
Viseu is a quite dry location, receiving approximately 79mm of precipitation annually, which averages out to around 7mm per month. The wettest month is October, averaging 33mm of rainfall. November and December also tend to see above-average precipitation. The driest month is January, with just 0mm. That's 33mm less than October, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Viseu is relatively calm, with an average annual wind speed of 3km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 3km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.
Seasons
16 days until Spring
It is currently winter in Viseu, which began on June 21, 2026. Viseu sits near the equator, so the traditional four-season cycle is less pronounced. Temperatures remain relatively stable year-round. The warmest period peaks in February at around 45°C, while the coldest stretch bottoms out in April near 24°C. Spring is next, beginning on September 23, 2026 (16 days from now).
Spring
Temperatures range from 25 to 41°C. Rainfall is relatively light, with around 66mm over the season and a monthly average of 22mm. Winds are generally light, averaging 2km/h. Light layers work well as temperatures warm through the season. It is a great time to be outdoors.
Summer
Temperatures range from 27 to 45°C. Precipitation is minimal, with only around 14mm for the entire season. Winds are generally light, averaging 4km/h. Stay hydrated, wear sun protection, and seek shade during the hottest hours of the day.
Autumn
Temperatures range from 24 to 41°C. Precipitation is minimal, with only around 0mm for the entire season. Winds are generally light, averaging 4km/h. Layered clothing works best as temperatures gradually cool. Enjoy the crisp air and changing scenery.
Winter
Temperatures range from 26 to 41°C. Precipitation is minimal, with only around 0mm for the entire season. Winds are generally light, averaging 3km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Viseu based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
