Temperatures in Australia have followed an increasing trend between the years of 1910 to 2004 by approximately 0.7 °C. Overnight minimum temperatures have warmed more rapidly than daytime maximum temperatures. The observed warming has hastened in recent years. The late-20th-century warming has been largely attributed to the increased greenhouse effect. Temperature differences between winter and summer are minor in the tropical region of Australia. However, they are greatest in the southern inland, with seasonal differences along the coast being moderated by the ocean's proximity. In July, a more common latitudinal distribution of average maximums is apparent, ranging from 30 °C near the north coast to below 3 °C in the mountainous areas of the south-east.