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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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| September | Very Warm: | Very Cold: |
|---|---|---|
| 1895 | 33.27% | 11.81% |
| 1896 | 5.83% | 22.63% |
| 1897 | 27.96% | 5.62% |
| 1898 | 8.64% | 1.20% |
| 1899 | 9.29% | 3.15% |
| 1900 | 28.28% | 11.06% |
| 1901 | 0.73% | 18.01% |
| 1902 | 1.64% | 20.15% |
