U.S. Percentage Areas (Very Warm/Cold, Very Wet/Dry)

NCDC transitioned to the nClimDiv dataset on Thursday, March 13, 2014. This was coincident with the release of the February 2014 monthly monitoring report. For details on this transition, please visit our public FTP site and our U.S. Climate Divisional Database site.

The percentage areas of the contiguous United States are computed based on the climate division data set. Those climate divisions having the monthly average temperature/total precipitation in the top ten percent (> 90th percentile) of their historical distribution are very warm/wet and those in the bottom ten percent (< 10th percentile) are very cold/dry.

Download: xml csv json
August Very Wet: Very Dry:
1895 6.32% 7.87%
1896 5.61% 19.08%
1897 4.08% 8.52%
1898 11.86% 4.50%
1899 7.94% 17.89%
1900 9.34% 19.79%
1901 18.90% 8.96%
1902 6.21% 18.55%
1903 12.45% 5.05%
1904 6.52% 1.18%
1905 3.27% 8.34%
1906 26.52% 3.74%
1907 7.16% 7.13%
1908 8.22% 5.13%
1909 12.93% 15.08%
1910 2.42% 22.25%
1911 11.62% 11.43%
1912 17.25% 4.90%
1913 2.68% 16.57%
1914 15.48% 13.27%
1915 22.10% 11.21%
1916 9.81% 4.28%
1917 6.33% 11.03%
1918 3.15% 2.38%
1919 8.61% 16.61%
1920 22.09% 3.19%
1921 9.97% 11.12%
1922 9.67% 12.70%
1923 16.48% 4.87%
1924 4.29% 26.78%
1925 4.57% 18.79%
1926 19.46% 7.68%
1927 11.46% 7.62%
1928 12.89% 9.68%
1929 4.15% 28.52%
1930 10.55% 20.84%
1931 12.12% 10.14%
1932 7.95% 5.54%
1933 15.51% 7.01%
1934 2.61% 13.65%
1935 5.86% 6.50%