About this map
SAAR means Standard Period Average Annual Rainfall. SAAR 4170 refers to the 1941–1970 period; values are expressed in millimetres per year. Read more about SAAR rainfall statistics from UKCEH.
Design and analysis of urban storm drainage — The Wallingford Procedure, Volume 3. Maps. Average annual rainfall (1941–1970), in millimetres.
Search for your site or click the map to read X and Y (British National Grid, metres) and SAAR 4170 (mm).
This web map is a manual digital reconstruction of the rainfall map published in the Wallingford Procedure. Always check values against the original source before use; accuracy is not guaranteed.
Interactive viewer by Obermajer Maps.