Daily air temperatures are given in degrees Celsius (°C) and are collated by month for each year from 1961 to 2021 with each file containing a month of data. Mean temperature values can be determined by calculating the average of the maximum and minimum temperature at a point, that is: Tmean=(Tmax-Tmin)/2. The number of stations available for temperature gridding analysis varies each year, from 48 stations in 1961 to 105 stations in 2004. The average number of stations available each year was around 84. While in 2021 there were up to 59 stations.