| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.47 | 0.49 | -0.02 |
| Feb | 0.63 | 0.70 | -0.07 |
| Mar | 0.91 | 0.95 | -0.04 |
| Apr | 1.94 | 2.00 | -0.06 |
| May | 3.23 | 3.22 | 0.01 |
| Jun | 3.53 | 3.54 | -0.01 |
| Jul | 2.95 | 2.77 | 0.18 |
| Aug | 2.43 | 2.55 | -0.12 |
| Sep | 2.01 | 1.97 | 0.04 |
| Oct | 1.78 | 1.80 | -0.02 |
| Nov | 0.60 | 0.71 | -0.11 |
| Dec | 0.54 | 0.56 | -0.02 |
21.02 | 21.26 | -0.24 |