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
Illinois Zephyr and Carl Sandburg train." The "Carl Sandburg" was added as a second daily round trip in 2006. During fiscal year 2015, both the "Illinois Zephyr" and "Carl Sandburg" carried a combined 208,961 passengers, a 2.8% decrease over fiscal year 2014. The two trains had a total revenue of $5,287,029 in fiscal year 2015, a 4.2% decrease over fiscal year 2014. The "Illinois Zephyr" is a descendant of the "Kansas City Zephyr" and "American Royal Zephyr" passenger train routes operated by the Chicago, Burlington and Quincy Railroad from 1953 until 1968 and 1971, respectively. The state of Illinois intervened in 1971 at the request