| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 3.52 | 3.54 | -0.02 |
| Feb | 2.96 | 2.97 | -0.01 |
| Mar | 4.10 | 4.00 | 0.10 |
| Apr | 3.63 | 3.64 | -0.01 |
| May | 3.74 | 3.64 | 0.10 |
| Jun | 4.40 | 4.43 | -0.03 |
| Jul | 4.80 | 4.84 | -0.04 |
| Aug | 4.68 | 4.70 | -0.02 |
| Sep | 4.93 | 5.31 | -0.38 |
| Oct | 3.53 | 3.65 | -0.12 |
| Nov | 3.37 | 3.35 | 0.02 |
| Dec | 3.51 | 3.47 | 0.04 |
47.17 | 47.54 | -0.37 |