Dubai has a hot desert climate . Summers in Dubai are extremely hot, prolonged, windy, and humid, with an average high around 40 °C (104 °F) and overnight lows around 30 °C (86 °F) in the hottest month, August. Most days are sunny throughout the year. Winters are comparatively cool, though mild to warm, with an average high of 24 °C (75 °F) and overnight lows of 14 °C (57 °F) in January, the coolest month. Precipitation, however, has been increasing in the last few decades, with accumulated rain reaching 110.7 mm (4.36 in) per year. Dubai summers are also known for the very high humidity level, which can make it very uncomfortable for many with exceptionally high dew points in summer. Heat index values can reach over 60 °C (140 °F) at the height of summer. The highest recorded temperature in Dubai is 48.8 °C (119.8 °F).