| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.58 | 0.53 | 0.05 |
| Feb | 0.81 | 0.75 | 0.06 |
| Mar | 1.54 | 1.46 | 0.08 |
| Apr | 2.94 | 2.93 | 0.01 |
| May | 4.07 | 4.10 | -0.03 |
| Jun | 4.32 | 4.23 | 0.09 |
| Jul | 3.04 | 3.12 | -0.08 |
| Aug | 3.60 | 3.81 | -0.21 |
| Sep | 2.66 | 2.64 | 0.02 |
| Oct | 2.29 | 2.33 | -0.04 |
| Nov | 1.23 | 1.21 | 0.02 |
| Dec | 0.83 | 0.82 | 0.01 |
27.91 | 27.93 | -0.02 |