climate chart in the format by Walther and Lieth, metric, °Celsisus and millimeters, made with Geoklima 2.1
Hedwig in Washington
CC BY 2.5
<a rel="nofollow" class="external text" href="http://www.dwd.de/de/FundE/Klima/KLIS/daten/online/nat/index_mittelwerte.htm">Deutscher Wetterdienst, Normalperiode 1961-1990</a>