| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.34 | 0.32 | 0.02 |
| Feb | 0.52 | 0.53 | -0.01 |
| Mar | 1.07 | 1.03 | 0.04 |
| Apr | 2.12 | 2.17 | -0.05 |
| May | 3.08 | 3.07 | 0.01 |
| Jun | 3.24 | 3.26 | -0.02 |
| Jul | 3.33 | 3.34 | -0.01 |
| Aug | 2.95 | 3.04 | -0.09 |
| Sep | 1.56 | 1.60 | -0.04 |
| Oct | 1.57 | 1.63 | -0.06 |
| Nov | 0.74 | 0.74 | 0.00 |
| Dec | 0.52 | 0.56 | -0.04 |
21.04 | 21.29 | -0.25 |