The annual course series allow the comparison and ranking of current temperature, sunshine and rainfall measurements against their long-term averages (norm values).. The daily temperature, sunshine and precipitation development since the beginning of the respective series of measurements can be illustrated graphically for the stations of the Swiss climatological network. The graphic charts for the current year cover the values of the past twelve months; they are updated daily.
Annual course series
Temperature evolution in Altdorf, 2018/2019
The graph of the course series for the past 365 days shows the temperature deviation from the average homogenous daily mean of the normal period from 1981-2010. Red bars indicate warmer, blue bars colder days. It can be seen at a glance that temperatures were cooler from the end of April to May 2019 than during the long-time average. Thereafter, the summer was significantly warmer. The 2018/2019 temperatures can be classified by means of the additionally illustrated standard deviation (dotted line) as well as the highest and lowest measured temperatures (grey values). This clearly shows that the high temperatures at the end of June 2019 and in October 2019 were close to or even higher than any previously measures values. The average temperature of 10.9°C, which was higher than normal by 1.1°C, likewise illustrates that the temperatures were higher during the past twelve months.
The graph of the course series over recent years shows the temperature deviation from the average homogenous daily mean of the normal period from 1981-2010 (black line). Here too, red bars indicate warmer, blue bars colder days. It is readily apparent why 2018 was one of the warmest years since measurements began in 1864. Every month except February and March showed higher, and in some cases, significantly higher temperatures than the normal period of 1981-2010. The range of all average monthly temperatures measured to date is shown by the light grey bars (from minimum to maximum). It is clear to see that the average monthly temperature in January 2018 was the maximum of all recorded January averages. At 11.6°C, the average temperature for the year in Altdorf in 2018 was 1.8°C above the norm (1981-2010) of 9.8°C.