| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.47 | 0.43 | 0.04 |
| Feb | 0.45 | 0.48 | -0.03 |
| Mar | 0.73 | 0.73 | 0.00 |
| Apr | 1.26 | 1.28 | -0.02 |
| May | 2.59 | 2.57 | 0.02 |
| Jun | 3.29 | 3.39 | -0.10 |
| Jul | 2.93 | 3.17 | -0.24 |
| Aug | 2.15 | 2.36 | -0.21 |
| Sep | 1.61 | 1.72 | -0.11 |
| Oct | 1.38 | 1.50 | -0.12 |
| Nov | 0.62 | 0.67 | -0.05 |
| Dec | 0.57 | 0.61 | -0.04 |
18.05 | 18.91 | -0.86 |