Annual and monthly averages for a range of elements can be selected by clicking a station location on the map to the left or by selecting from the menu below.
All values are given to a precision of one decimal place. For 'Days of' elements, 0.1 equates to one day every ten years, 0.5 to one day every two years, 2.5 to five days every two years, and so on.
Download a description of the analysis methods used to generate the long-term averages.