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Noite, or night, typically brings cooler temperatures, with average lows ranging from 8-12°C (46-54°F) in the north to 12-15°C (54-59°F) in the south. In contrast, dia, or day, often sees warmer temperatures, with average highs ranging from 17-22°C (63-72°F) in the north to 22-25°C (72-77°F) in the south. The diurnal temperature range is significant in Portugal, with some areas experiencing as much as 10-12°C (18-22°F) difference between day and night temperatures. This variation is particularly pronounced in the interior regions, where the influence of the Atlantic Ocean is less pronounced. The night-time temperatures are influenced by the country's geography, with the mountains of the north and central regions creating a rain shadow effect that leads to cooler temperatures. In contrast, the coastal regions tend to be milder, with temperatures moderated by the ocean's influence. During the day, the sun's radiation warms the land, leading to a rapid increase in temperature. This is particularly evident in the south, where the Algarve region experiences some of the warmest temperatures in the country. The diurnal temperature range is also influenced by the time of year, with the greatest differences occurring during the spring and autumn months. The variation between night and day has a significant impact on the country's ecosystems, with many plants and animals adapting to the changing temperatures. The diurnal temperature range also affects the country's agriculture, with farmers often taking advantage of the cooler night temperatures to plant and harvest crops.