Munich - Climate
The most important thing to note about Munich's weather is that it's extremely changeable! The four-seasons-in-one-day experience is not uncommon. Summers in 2002, 2003 have enjoyed daily maximums in the mid to high 30's, with overnight minimums no lower than the high teens. Winters during the same years have seen several days with maximums below freezing, and minimum temperatures of -18 quite regularly. On average the maximum summer temperature is 25 and winter maximums are in the low single digits.
The hottest months are June, July and August, while the coldest months are January and February. There is often a lot of rain in summer, and short periods of snowfall in winter. Warm sunny days can be enjoyed in Spring and Autumn, although snow in September is not uncommon.
An unusual weather phenomenon that occurs on single days a few times a year is the "Föhn". This is a warm wind that comes off the Alps, providing spectacularly clear views of the mountains from the city. During Föhn many people complain of headaches, which may be caused by the accompanying high pressure system.
In the summer it's important to protect yourself against sunburn and dehydration, as despite the precipitation (which peaks at 150mm per month in summer) Munich's climate is very dry. (Many Munchners choose to ignore the advice against sunburn and sunbake nude in the Englischer Garten!)
In winter the monthly precipitation is only 50mm, so it is even more necessary to apply moisturiser and use a humidifier overnight. Good boots that don't slip on ice and snow, gloves, a hat that covers the ears and a long, warm coat are essential winter wear.