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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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| May | Very Warm: | Very Cold: |
|---|---|---|
| 1895 | 4.80% | 3.98% |
| 1896 | 56.10% | 18.21% |
| 1897 | 31.61% | 5.53% |
| 1898 | 4.58% | 5.76% |
| 1899 | 21.14% | 18.42% |
| 1900 | 19.56% | 1.42% |
| 1901 | 17.06% | 0.12% |
| 1902 | 27.78% | 0.00% |
| 1903 | 0.04% | 14.05% |
| 1904 | 5.16% | 1.30% |
| 1905 | 11.10% | 17.23% |
| 1906 | 1.03% | 2.32% |
| 1907 | 0.75% | 70.79% |
| 1908 | 0.02% | 22.82% |
| 1909 | 0.00% | 18.09% |
| 1910 | 12.62% | 23.62% |
| 1911 | 20.08% | 9.70% |
| 1912 | 2.79% | 4.39% |
| 1913 | 4.30% | 8.20% |
| 1914 | 1.47% | 3.45% |
| 1915 | 5.64% | 37.35% |
| 1916 | 4.80% | 25.82% |
| 1917 | 0.00% | 84.26% |
| 1918 | 17.18% | 9.84% |
| 1919 | 1.74% | 8.34% |
| 1920 | 1.68% | 6.61% |
| 1921 | 0.23% | 5.35% |
| 1922 | 5.86% | 0.00% |
| 1923 | 0.00% | 1.77% |
| 1924 | 14.99% | 56.62% |
| 1925 | 11.11% | 15.32% |
| 1926 | 2.29% | 4.36% |
| 1927 | 14.46% | 17.94% |
| 1928 | 21.54% | 3.66% |
| 1929 | 0.00% | 8.59% |
| 1930 | 0.42% | 19.14% |
| 1931 | 12.06% | 22.56% |
| 1932 | 0.31% | 3.77% |
| 1933 | 20.10% | 30.13% |
| 1934 | 55.34% | 0.00% |
| 1935 | 1.61% | 48.64% |
| 1936 | 37.49% | 0.10% |
| 1937 | 4.44% | 0.08% |
| 1938 | 0.79% | 0.03% |
| 1939 | 19.55% | 0.00% |
| 1940 | 21.47% | 5.15% |
| 1941 | 14.91% | 1.10% |
| 1942 | 4.82% | 12.83% |
| 1943 | 8.39% | 10.68% |
| 1944 | 16.92% | 2.28% |
| 1945 | 0.00% | 27.91% |
| 1946 | 1.34% | 12.08% |
