Viana do Alentejo Temperatures: Monthly Averages and Year-Round Insights

On this page, we’ll explore Viana do Alentejo’s temperature statistics in detail, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in Portugal.

Monthly Temperature Averages

Visitors to Viana do Alentejo will encounter a climate influenced by big temperature differences across the year. Average maximum daytime temperatures range from a very warm 33°C in July, the warmest time of the year, to a moderate 15°C during cooler months like January. At night, minimum temperatures typically average around 6°C during these months.

The chart below illustrates the average maximum day and minimum night temperatures in Viana do Alentejo by month:

The lowest temperatures typically occur between 4 AM and 6 AM, while the peak temperatures are generally observed around 3 PM, coinciding with the sun’s strongest heating effect. July, the city’s warmest month, enjoys 370 hours of sunshine.

The chart below shows the average temperature throughout the year:

January, the city’s coldest month, sees about 58 mm of rainfall spread over roughly 13 days. It records 165 hours of sunshine of sunshine.

Annual Temperatures in Portugal Compared

The map below shows the annual temperature across Portugal. You can also select the different months in case you are interested in a specific month.

Annual

Annual

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Legend

very warm

warm

pleasant

moderate

cold

very cold

Very warm means maximum temperatures above 32°C. Warm: 25°C to 32°C. Pleasant: 18°C to 25°C Moderate: 10°C to 18°C. Cold: 5°C to 10°C. Very cold: lower than 5°C

Viana do Alentejo Temperatures Compared World Wide

Viana do Alentejo’s average annual maximum temperature is 24°C. Let’s compare this with some popular tourist destinations:

Athens, Greece, experiences an average annual temperature of 23°C, with hot summers and mild winters typical of a Mediterranean climate.

Meanwhile, Queenstown, New Zealand, the average annual temperature is significantly lower at 10°C, with mild summers and cold winters.

Boston, USA, experiences seasonal shifts similar to New York, with an average annual temperature of 16°C.

Melbourne, Australia, has a slightly cooler climate, with an average annual temperature of 20°C.

How does the temperature feel?

Humidity is an essential factor in how you experience temperature. When a warm period is accompanied by high humidity, it results in a higher perceived temperature. This is especially true when temperatures exceed 25°C, as it can cause greater discomfort.

In Viana do Alentejo, during the coolest month, January, you will experience 81% humidity, which is considered very high. This is accompanied by an average maximum temperature of 15°C. In the warmest month, July, the humidity is 50% combined with an average maximum temperature of 33°C, which creates a moderate-feel temperature. Explore our detailed page on humidity levels for further details.

How are these Temperatures Measured?

Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.

This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.

Global Warming and Its Effects

Climate change is affecting worldwide temperatures, including in Viana do Alentejo. It has massive impacts on both local and global levels:

Global Temperature Rise: The average global land and sea temperatures have risen by about 1.2°C since pre-industrial times.
Local Impacts: Most regions of the world are witnessing warmer winters with fewer frost and snowfall days. The global frequency and severity of heatwaves have increased. For example, Europe's summers of 2018, 2019, and 2020 all broke records. Summers are also becoming drier; however, during winter, inland regions have experienced increased rainfall. This has caused elevated river levels and more cases of flooding.

Many countries are experiencing earlier springs and later autumns. This is why some bird species have shifted their migration dates.

For more detailed information about Viana do Alentejo’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Viana do Alentejo climate page.