Metropolitan City of Cagliari the warmest month with an average temperature of that of about . African anticyclone activity can cause heat waves starting in June. From mid-June to mid-September rain is rare and appears in afternoon storms. The rainy season starts in September, but the first cold days come in December, usually the wettest month. Winds are frequent, especially the mistral and sirocco; in Summer days a marine sirocco breeze ("s'imbattu") lowers the temperature and the humidity. On the surrounding mountains, the climate is very different with plentiful average rainfall, cold winters, and mild warm summers (Csb in the Köppen climate classification). As
Pioneer Zephyr equipped with matching stainless-steel fluting. Many of the Burlington's long distance named passenger trains began operating under the "Zephyr" banner, including the "Nebraska Zephyr", "Twin Cities Zephyr", and perhaps the most famous of the namesake, the "California Zephyr". On the second anniversary of the train's famous dash, the original "Zephyr" was rechristened the "Pioneer Zephyr" to distinguish it as the first of the Burlington's growing "Zephyr" fleet. In 1938, car 525 was replaced by car number 500, a 40-seat buffet/lounge car, to provide light meals. Car number 505, the baggage-coach combine, was rebuilt at this time into a full baggage