Overview: HamburgHamburg (Germany) in general has a mild climate. Temperatures during the day are in the range from 4 °C (40 °F) in January to 24 °C (75 °F) in July. Temperatures during the night go from -1 °C (31 °F) in January to 13 °C (56 °F) in July. The driest month is April with just 10 days of rain, on the contrary, the month when it rains the most is January with 13 days of rain.