The origins of the name Ronchi dei Legionari have been documented since 1229 in the Friulian form Ronches. Until 1925, it was called Ronchi di Monfalcone. Its current name is owed to the legionaries of Gabriele D'Annunzio, who set out from here on September 12, 1919 (the March of Ronchi), marking the beginning of the Fiume Expedition.
According to the Italian census of 1971, 4% of the population was of Slovene ethnicity,[3] while according to the Austrian census of 1910 only 1% of the population was Slovenian.[4]
The climate of the city is of the sub-continental type, with cold but not harsh winters (average temperature in January is 3.5°C) and summers that are not excessively hot, tempered by the proximity of the sea (temperature averages at about 23.5 C in July). The average annual temperature is just below 14°C.[5] The Ronchi dei Legionari weather station is located in the municipal area, officially recognized by the world meteorological organization.
^Office addresses. Air Dolomiti. 7 March 2008. Retrieved on 21 December 2010. "Registered Headquarters: AIR DOLOMITI S.p.A. Linee Aeree Regionali Europee Via Paolo Bembo, 70 37062 Dossobuono di Villafranca (VR) - Italy" "Executive Headquarters: AIR DOLOMITI S.p.A. Linee Aeree Regionali Europee Via Senatore Antonio Tambarin, 34 34077 Ronchi dei Legionari (GO) - Italy"
^"Gemellaggi" (in Italian). Ronchi dei Legionari. Retrieved 2022-11-04.