| WMO/ICAO ID | Name | MAE | RMSE | BIAS | maxE | minE | Cases |
|---|---|---|---|---|---|---|---|
| United States | 3.89 | 5.07 | -1.34 | 19.9 | -27.1 | 2399 | |
| Alabama | 5.19 | 6.41 | -1.37 | 14.6 | -14.6 | 70 | |
| Alaska | 5.14 | 6.62 | -2.00 | 13.1 | -15.8 | 24 | |
| Arizona | 2.94 | 3.50 | 2.50 | 7.0 | -4.0 | 48 | |
| California | 2.38 | 2.94 | 0.80 | 7.9 | -6.9 | 168 | |
| Colorado | 4.53 | 6.36 | -2.38 | 7.2 | -27.1 | 120 | |
| Connecticut | 3.37 | 4.17 | -0.68 | 10.0 | -7.5 | 24 | |
| Florida | 2.48 | 3.36 | -0.77 | 13.2 | -11.6 | 144 | |
| Idaho | 3.56 | 4.87 | -2.14 | 5.1 | -13.0 | 24 | |
| Illinois | 5.28 | 6.11 | -3.98 | 9.0 | -13.2 | 48 | |
| Indiana | 5.48 | 7.25 | -4.08 | 5.9 | -19.9 | 24 | |
| Iowa | 3.80 | 4.67 | -3.01 | 7.4 | -11.2 | 48 | |
| Kansas | 3.19 | 3.98 | -0.09 | 6.5 | -10.8 | 24 | |
| Kentucky | 5.20 | 6.99 | -3.92 | 6.7 | -19.5 | 48 | |
| Louisiana | 3.90 | 5.06 | -0.34 | 11.7 | -8.5 | 24 | |
| Maine | 2.80 | 3.49 | 0.12 | 8.1 | -6.3 | 48 | |
| Maryland | 4.68 | 5.75 | -2.69 | 8.4 | -11.7 | 24 | |
| Massachusetts | 3.44 | 4.39 | -0.30 | 10.3 | -6.1 | 24 | |
| Michigan | 3.79 | 4.60 | -2.44 | 7.2 | -10.7 | 48 | |
| Minnesota | 5.21 | 6.42 | -4.44 | 7.4 | -14.0 | 48 | |
| Missouri | 4.31 | 5.14 | -3.48 | 10.9 | -10.8 | 48 | |
| Montana | 4.69 | 5.87 | -1.36 | 18.2 | -11.8 | 72 | |
| Nebraska | 3.86 | 4.60 | -1.43 | 7.5 | -9.5 | 21 | |
| Nevada | 2.84 | 3.67 | -0.49 | 6.2 | -10.0 | 48 | |
| New Hampshire | 7.05 | 8.37 | 6.11 | 19.9 | -8.3 | 23 | |
| New Jersey | 4.10 | 5.14 | -1.76 | 10.9 | -10.9 | 48 | |
| New Mexico | 2.27 | 3.11 | -0.30 | 3.4 | -10.2 | 24 | |
| New York | 4.08 | 5.21 | -2.28 | 11.2 | -11.9 | 96 | |
| North Carolina | 4.19 | 5.29 | 0.55 | 13.5 | -11.1 | 72 | |
| North Dakota | 3.75 | 4.73 | -1.96 | 8.2 | -12.3 | 48 | |
| Ohio | 5.32 | 6.72 | -3.26 | 7.9 | -17.6 | 24 | |
| Oklahoma | 2.91 | 3.52 | -0.82 | 7.4 | -7.0 | 48 | |
| Oregon | 2.75 | 3.51 | -2.72 | 0.4 | -7.4 | 24 | |
| Pennsylvania | 4.40 | 5.99 | -2.60 | 9.8 | -18.7 | 48 | |
| South Carolina | 4.90 | 6.25 | 2.33 | 12.7 | -10.1 | 24 | |
| South Dakota | 3.78 | 4.85 | 1.00 | 10.9 | -5.6 | 24 | |
| Tennessee | 5.62 | 6.82 | -3.44 | 13.0 | -15.9 | 48 | |
| Texas | 3.54 | 4.40 | -0.80 | 12.7 | -15.1 | 221 | |
| US State Georgia | 4.35 | 5.36 | 0.00 | 12.2 | -10.2 | 72 | |
| Utah | 4.50 | 5.82 | -4.28 | 2.7 | -15.4 | 24 | |
| Vermont | 4.23 | 5.14 | -2.74 | 7.7 | -10.9 | 24 | |
| Virginia | 4.17 | 5.28 | -1.79 | 15.0 | -13.0 | 120 | |
| Washington | 2.66 | 3.47 | -1.16 | 7.6 | -8.0 | 72 | |
| Wisconsin | 5.81 | 6.49 | -4.02 | 8.8 | -11.5 | 24 | |
| Wyoming | 4.06 | 5.15 | -2.10 | 13.2 | -14.5 | 72 |