The average summer temperature in Switzerland has sharply risen in the last 30 years
Temperature in degrees Celcius
10.5
11
11.5
12
12.5
13
13.5
14
14.5
15
15.5
16
16.5
1870
1880
1890
1900
1910
1920
1930
1940
1950
1960
1970
1980
1990
2000
2010
June-August average
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June-August average
June-August average
