| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.41 | 0.42 | -0.01 |
| Feb | 0.62 | 0.58 | 0.04 |
| Mar | 1.15 | 1.23 | -0.08 |
| Apr | 2.31 | 2.41 | -0.10 |
| May | 3.65 | 3.87 | -0.22 |
| Jun | 3.68 | 3.70 | -0.02 |
| Jul | 3.20 | 3.53 | -0.33 |
| Aug | 2.94 | 3.11 | -0.17 |
| Sep | 1.68 | 1.78 | -0.10 |
| Oct | 1.70 | 1.77 | -0.07 |
| Nov | 0.87 | 0.81 | 0.06 |
| Dec | 0.51 | 0.59 | -0.08 |
22.72 | 23.80 | -1.08 |