But at about 4Â°C it reaches a maximum density and then decreases in density as it approaches the freezing point. This decrease in density is only about one part in 10,000 as it cools from 4Â°C to 0Â°C, but this is sufficient to cause the water near freezing to come to the top. The water further expands upon freezing, so that water freezes from the top down, and ice floats on water.
Weather in Germany in April. The average maximum daytime temperature in Germany in April is a cool 13Â°C (55Â°F). There are usually 5 hours of bright sunshine each day, which represents 39% of the 14 hours of daylight. Expect 41mm (1.6 inches) of rainfall across the whole of April with 13 days with some rain falling. Maximum UV levels will be moderate (4 UV index) at midday when the skies are clear. The average night-time temperature is usually a cold 4Â°C (39Â°F). The weather in Germany in April is represented by Berlin.
Guide to Austria weather in April The average maximum daytime temperature in Austria in April is a comfortable 16Â°C (61Â°F). The average night-time temperature is usually a cold 6Â°C (43Â°F).