| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 3.57 | 3.29 | 0.28 |
| Feb | 2.58 | 2.28 | 0.30 |
| Mar | 2.26 | 2.00 | 0.26 |
| Apr | 1.69 | 1.70 | -0.01 |
| May | 1.30 | 1.32 | -0.02 |
| Jun | 0.70 | 0.68 | 0.02 |
| Jul | 0.30 | 0.29 | 0.01 |
| Aug | 0.26 | 0.31 | -0.05 |
| Sep | 0.46 | 0.44 | 0.02 |
| Oct | 1.47 | 1.34 | 0.13 |
| Nov | 3.00 | 2.90 | 0.10 |
| Dec | 4.37 | 4.24 | 0.13 |
21.96 | 20.79 | 1.17 |