Munich has a continental climate, strongly modified by the proximity of the Alps. The city's altitude and proximity to the northern edge of the Alps mean that precipitation is high. Rain storms often come violently and unexpectedly. The range of temperature between day and night or summer and winter can be extreme. A warm downwind from the Alps (a föhn wind) can change the temperatures completely within a few hours, even in the winter.
Winters last from December to March. Munich experiences cold winters, but heavy rainfall is rarely seen in the winter. The coldest month is January with an average temperature of ?1 °C (30 °F). Snow cover is seen for at least a couple of weeks during winter. Summers in Munich city are fairly warm with an average maximum of 23 °C (73 °F) in the hottest month of July. The summers last from May until September.