| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.39 | 0.37 | 0.02 |
| Feb | 0.60 | 0.61 | -0.01 |
| Mar | 1.10 | 1.06 | 0.04 |
| Apr | 2.21 | 2.20 | 0.01 |
| May | 3.27 | 3.25 | 0.02 |
| Jun | 3.48 | 3.69 | -0.21 |
| Jul | 3.58 | 3.57 | 0.01 |
| Aug | 2.84 | 2.82 | 0.02 |
| Sep | 1.65 | 1.62 | 0.03 |
| Oct | 1.71 | 1.70 | 0.01 |
| Nov | 0.82 | 0.82 | 0.00 |
| Dec | 0.56 | 0.60 | -0.04 |
22.21 | 22.31 | -0.10 |