Castelo Branco Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from very warm to moderate in Castelo Branco. On average, daytime temperatures range from a very warm 33°C (91°F) in July to a moderate 14°C (57°F) in January.

Nighttime temperatures range from 18°C (64°F) in July to 5°C (41°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Castelo Branco has a moderate amount of precipitation, averaging 676 mm (27 in) of rainfall annually. The seasons in Castelo Branco bring significant changes in precipitation. The wettest month, October, receives moderate rainfall, with an average of 99 mm (3.9 in) of precipitation. This rainfall is distributed across 12 rainy days.

In contrast, the driest month, July, experiences much less rainfall, totaling 5.6 mm (0.2 in) over 4 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Castelo Branco Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

In Castelo Branco, summer days are longer and more sunny, with daily sunshine hours peaking at 11.5 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 3.5 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Castelo Branco.

The city experiences its highest humidity in February, reaching 81%. In August, the humidity drops to its lowest level at 55%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year