| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.33 | 0.31 | 0.02 |
| Feb | 0.53 | 0.54 | -0.01 |
| Mar | 1.05 | 1.03 | 0.02 |
| Apr | 2.14 | 2.21 | -0.07 |
| May | 3.08 | 3.10 | -0.02 |
| Jun | 3.32 | 3.35 | -0.03 |
| Jul | 3.34 | 3.33 | 0.01 |
| Aug | 2.93 | 3.13 | -0.20 |
| Sep | 1.57 | 1.62 | -0.05 |
| Oct | 1.59 | 1.65 | -0.06 |
| Nov | 0.77 | 0.74 | 0.03 |
| Dec | 0.51 | 0.57 | -0.06 |
21.16 | 21.58 | -0.42 |