“Climate Normals Sion 1981-2010”(PDF). 《Climate diagrams and normals from Swiss measuring stations》. Federal Office of Meteorology and Climatology (MeteoSwiss). 2013년 1월 21일에 확인함.[깨진 링크(과거 내용 찾기)]
“Climate Normals Sion 1981-2010”(PDF). 《Climate diagrams and normals from Swiss measuring stations》. Federal Office of Meteorology and Climatology (MeteoSwiss). 2013년 1월 21일에 확인함.[깨진 링크(과거 내용 찾기)]