| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 3.91 | 4.11 | -0.20 |
| Feb | 3.46 | 3.49 | -0.03 |
| Mar | 4.81 | 5.20 | -0.39 |
| Apr | 4.38 | 4.60 | -0.22 |
| May | 3.46 | 3.41 | 0.05 |
| Jun | 3.84 | 3.94 | -0.10 |
| Jul | 3.26 | 3.22 | 0.04 |
| Aug | 3.79 | 3.76 | 0.03 |
| Sep | 4.02 | 4.04 | -0.02 |
| Oct | 4.58 | 4.62 | -0.04 |
| Nov | 4.11 | 4.24 | -0.13 |
| Dec | 4.75 | 4.92 | -0.17 |
48.37 | 49.55 | -1.18 |