| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 3.01 | 3.10 | -0.09 |
| Feb | 2.97 | 3.12 | -0.15 |
| Mar | 4.59 | 4.64 | -0.05 |
| Apr | 4.98 | 5.13 | -0.15 |
| May | 5.22 | 5.21 | 0.01 |
| Jun | 3.94 | 3.86 | 0.08 |
| Jul | 3.71 | 3.76 | -0.05 |
| Aug | 3.34 | 3.31 | 0.03 |
| Sep | 3.74 | 3.83 | -0.09 |
| Oct | 3.89 | 3.84 | 0.05 |
| Nov | 4.34 | 4.47 | -0.13 |
| Dec | 3.58 | 3.64 | -0.06 |
47.31 | 47.91 | -0.60 |