Castro Daire Temperature by Month

The average annual maximum temperature in Castro Daire, Centro Region, Portugal is 19°C (66°F), with daytime highs ranging from 12°C (54°F) in January to 28°C (82°F) in August. This page covers monthly averages, day-night differences, and how Castro Daire compares to cities worldwide.

In Castro Daire, temperatures differ significantly between summer and winter months. Nighttime lows reflect this range, dropping from 15°C (59°F) in August to 3°C (37°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Castro Daire by month:

Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM. August, the city's warmest month, sees 329 hours of sunshine.

The chart below shows the average temperature throughout the year:

Castro Daire's average annual maximum temperature is 19°C (66°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Queenstown, New Zealand averages 10°C (50°F) annually, remember seasons are flipped, so its coldest months fall in June and July.

Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.

Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.

In Castro Daire, January is the coolest month, with average highs of 12°C (54°F) and humidity around 80%, considered very high. In August, the warmest month, temperatures average 28°C (82°F) with 55% humidity, conditions that feel moderate. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.

Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.

For more on Castro Daire's weather, including monthly rainfall, sunshine hours, and humidity, visit our Castro Daire climate page.