1971-2000 Normal Precipitation Maps

A common misconception is that a climate "normal" describes the "typical" state of the atmosphere. "Normal" is simply a 30-year arithmetic mean, computed once per decade. The precipitation normals data presented in the maps below summarize the observation period 1971-2000. These values are benchmarks to be used throughout this decade as a measure of central tendency. Normals data can be useful in placing ongoing weather conditions in historical context. Additionally, normals data offer an excellent tool for describing climate variability across space. Clicking on any of the maps below will bring the user to a page that provides a larger version of the normal precipitation map, as well as links to *.zip files containing the map in a variety of formats (*.gif, *.wmf, ESRI ArcView, EPPL7).


Normal Winter Precipitation Winter (Dec-Feb) Normal December Precipitation December Normal January Precipitation January Normal February Precipitation February
Normal Spring Precipitation Spring (Mar-May) Normal March Precipitation March Normal April Precipitation April Normal May Precipitation May
Normal Summer Precipitation Summer (Jun-Aug) Normal June Precipitation June Normal July Precipitation July Normal August Precipitation August
Normal Autumn Precipitation Autumn (Sep-Nov) Normal September Precipitation September Normal October Precipitation October Normal November Precipitation November

Normal Annual Precipitation Annual Normal Apr-Oct Precipitation April - October Normal May-Sep Precipitation May - September

1981-2010 Normal Precipitation Maps

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URL: http://climate.umn.edu/doc/historical/precip_norm.htm
Last modified: November 13, 2003