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

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.

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April Very Warm: Very Cold:
1895 17.81% 1.90%
1896 35.28% 9.83%
1897 8.75% 5.95%
1898 12.18% 20.55%
1899 1.98% 3.08%
1900 12.10% 5.76%
1901 1.60% 28.67%
1902 11.44% 2.07%
1903 0.00% 4.32%
1904 1.85% 33.63%
1905 0.49% 0.77%
1906 7.55% 0.00%
1907 1.15% 58.36%
1908 13.40% 1.15%
1909 0.00% 25.35%
1910 30.21% 0.00%
1911 1.68% 6.27%
1912 1.54% 17.38%
1913 1.70% 0.00%
1914 0.00% 2.04%
1915 46.81% 1.20%
1916 0.00% 4.68%
1917 1.13% 23.49%
1918 0.00% 22.04%
1919 0.00% 0.00%
1920 0.00% 55.35%
1921 13.65% 3.36%
1922 7.89% 17.79%
1923 0.00% 0.81%
1924 0.00% 2.38%
1925 50.57% 0.08%
1926 16.91% 35.92%
1927 14.55% 1.15%
1928 0.00% 43.02%