1961–2020, Czech Republic
The infographic above shows the average number of ice days as an average for the Czech Republic for the individual years in the period 1961–2020 (average from all the stations). The column chart shows an obvious decreasing trend. This decrease in the number of days with permanent frost is particularly pronounced in the last decade of 2011–2020. Based on monthly data, the most statistically significant decrease is observed in December.
The highest number of ice days within the period of analysis was observed in 1963, in contrast, the least number of ice days was seen in 1974. 1974 together with 2020 are the only years with average number of ice days below 10. However, it should be emphasized that despite this long-term trend, significant deviations are possible – as was seen in 2010, when the number of ice days was one of the highest.