Abstract
The report consists of a map of world and continental weather extremes and a map of North American weather extremes, with comments on the reliability of the records shown. Included are highest and lowest temperatures, largest temperature ranges, greatest and least amounts of precipitation for various durations, maximum precipitation variability, greatest thunderstorm frequency, highest and lowest atmospheric pressure, highest solar radiation, largest hailstones, greatest snowfall, highest wind speed, highest humidity, and most frequent occurrence of dense fog. Both the absolute extreme and the most extreme annual average are given for most of the elements. As far as possible, the records are taken from official sources, and all of them are documented. Conditions of site, instrumentation, observational procedure, and other factors pertinent to the reliability of extremes are discussed.

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