The climate in the Central Valley is generally classified as Mediterranean-continental with a wet, cool winter and long, dry summer. In the interior of the Central Valley, temperatures vary greatly from day to night. During summer, temperatures can drop to as low as 5°C (40°F) at night with daytime highs around 29°C (84°F). Winters are typified by very cold mornings and nights, although afternoons are often much warmer. Dressing in layers is highly recommended for this time of year. Recommended clothing is a jacket or sweatshirt, sweaters, long underwear and warm socks. It is also recommended to wear a jacket if going out at night, even during the summer months.
In the coastal regions, such a Valparaiso, temperatures may be more consistent from day to night and season to season. Summertime highs along the coast are about 22°C (73°F) and wintertime lows reach around 9°C (50°F). A warm jacket is recommended for wintertime and it is good idea to wear a jacket or sweatshirt at night even during the summer months.