Oooops: I initially used C/Decade. It is F/Decade.And I have to check the Trend.
Update: The trend is correct once I corrected the units.
Update: Here is a link to NOAA for California. Ohio is doing the opposite since 1998.
January 2015 Tmax Ordered By State Rank
Only 6 States in the top 10. Only 9 in the top 20. 27 out of 48 have a rank of less than 61 (the middle of 121).
And note that 15 states January’s are cooling since 1895 .
And 38 states January’s are cooling since 1998.
| State | Rank (1 = Hottest) | Trend Since 1895 in F/Decade | Trend Since 1998 in F/Decade |
| Oregon | 1 | 0.45 | 1.86 |
| California | 3 | 0.36 | 2.66 |
| Nevada | 4 | 0.29 | 0.79 |
| Utah | 8 | 0.31 | -1.6 |
| Wyoming | 8 | 0.38 | -0.15 |
| Idaho | 9 | 0.26 | 0.33 |
| Washington | 11 | 0.38 | 0.28 |
| Arizona | 19 | 0.34 | -0.63 |
| Colorado | 19 | 0.23 | -0.96 |
| Montana | 22 | 0.44 | 0.83 |
| North Dakota | 23 | 0.45 | 0.85 |
| South Dakota | 25 | 0.3 | -0.61 |
| Minnesota | 27 | 0.24 | -1.38 |
| Kansas | 28 | 0.2 | 0.06 |
| Nebraska | 29 | 0.2 | -1.02 |
| Iowa | 31 | 0.01 | -1.3 |
| Missouri | 44 | -0.03 | -0.62 |
| Oklahoma | 49 | 0.11 | 0.05 |
| Florida | 51 | 0.05 | -0.54 |
| New Mexico | 56 | 0.23 | -1.67 |
| Wisconsin | 60 | 0.12 | -2.32 |
| Arkansas | 68 | -0.11 | -1.43 |
| Illinois | 68 | -0.06 | -1.8 |
| North Carolina | 68 | -0.06 | -1.75 |
| Georgia | 71 | -0.01 | -1.63 |
| South Carolina | 71 | -0.04 | -1.48 |
| Virginia | 71 | -0.02 | -2.29 |
| Alabama | 73 | -0.17 | -1.65 |
| Mississippi | 73 | -0.19 | -1.64 |
| Delaware | 75 | 0.07 | -2.16 |
| Indiana | 78 | -0.13 | -2.57 |
| Kentucky | 78 | -0.15 | -2.67 |
| Maine | 78 | 0.13 | 0.3 |
| Maryland | 79 | 0.06 | -2.46 |
| New Jersey | 79 | 0.17 | -2.12 |
| Tennessee | 79 | -0.18 | -2.24 |
| Louisiana | 80 | -0.12 | -2.02 |
| Michigan | 81 | 0.13 | -1.92 |
| West Virginia | 82 | -0.16 | -2.84 |
| New Hampshire | 85 | 0.08 | -0.63 |
| New York | 85 | 0.06 | -1.18 |
| Vermont | 86 | 0.04 | -0.66 |
| Connecticut | 87 | 0.1 | -1.24 |
| Ohio | 88 | -0.09 | -2.85 |
| Massachusetts | 89 | 0.11 | -1 |
| Pennsylvania | 89 | 0.04 | -2.6 |
| Texas | 90 | 0.05 | -2.3 |
| Rhode Island | 92 | 0.13 | -1.14 |
sunshine hours 
Is it really C/decade?
That makes California 30 C/Century.
Good post.Interesting that since 1998 maximum temperatures have declined by 1.1F averaged over all states in the best metered country in the world.