Type a place and choose from nearby weather stations to see temperature, precipitation and sunshine data for any year since 2000 (some years are unavailable for some stations).
This only works for German weather. See the details below for more information.
Red bars in the precipitation plot mean anything except rain (snow, hail and whatnot). The black line in the sunshine plot denotes the maximum possible sunshine hours as computed with the sunrise script – hence, it does not account for observer altitude or obstacles between the observer and the true horizon.
See this post for more details.
Update 2015-10-13: Weather service DWD has changed the way the historical data files can be accessed. Until I find the time to update the code this script will no longer work.