climate classification system, Überlingen is a Cfb climate: the C designates climates with average monthly temperatures above in their warmest months (April to September in northern hemisphere) and above in their coldest months. The f indicates a significant year-round precipitation pattern with little or no difference between the amount of precipitation in the warmer months and the colder months. Decisively for the climate, winds can flow alternately from westerly directions, which often result in precipitation, and easterly, which usually includes high pressure systems and cooler weather than average. The Föhn, a warm wind, plays an important role in the northern alpine valleys and has also some impact on the cities around Lake Constance. The Bise, or east or north-east wind, is especially typical in winter. The most severe weather often occurs during the change of season, when both kinds of winds bring weather fronts that collide. Demographics Economy Ueberlingen is home of several high tech industries in manufacturing, defense, and electrical engineering. Among them are: Diehl Defence GmbH & Co. KG MTU Friedrichshafen Logistics RAFI Eltec GmbH Culture Dialects Überlingen is situated in the area where a variety of Low Alemannic German (Niederalemannisch), Lake Constance Alemannic German (Bodenseealemannisch) is spoken. Lake Constance Alemannic German can be distinguished from High Alemannic German spoken to the south in Switzerland and Swabian, which is spoken to the east in Friedrichshafen and to the north from Pfullendorf on. Fastnacht Überlingen is a stronghold of the Swabian-Alemannic carnival. The carnival club, Narrenzunft Überlingen, or the Knaves Guild of Überlingen, is a member of the "Viererbund" carnival union. The carnival clubs of Rottweil, Oberndorf and Elzach are the other three members of this union. The carnival character of Überlingen dates to the 14th century, when it is first mentioned in city council documents; the figure is called "Der Überlinger Hänsele," which would translate roughly, and redundantly, as The Little Jackie of Überlingen. On St. Martin's Day, in November, the Carnival clubs officially begin their practice; the club members parade through the streets behind a band playing the Hänsele song. Überlingers fall into line behind the Hänsele, and the procession ends with an impromptu rally in the market square. The carnival clubs heighten their activities closer to Fastnacht, the Swabian term for the celebration of carnival (see also Fasching or Fastnacht). Celebrations peak at Shrove Tuesday. The carnival character, Hänsele, appears in many celebrations throughout the year.