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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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| 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% |
