Castelo Branco experiences a moderate climate with distinct seasonal variations. Winters are cool and wet, with average temperatures ranging from 6°C in January to 8°C in February, often falling below freezing point. As spring approaches, temperatures gradually rise, reaching averages of 10°C in March and 12°C in April. Summers are warm to hot, with July and August being the hottest months, averaging around 21-23°C, while autumns bring a slight cool-down, returning to average temperatures similar to those of winter.