| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.60 | 0.58 | 0.02 |
| Feb | 0.82 | 0.87 | -0.05 |
| Mar | 1.54 | 1.49 | 0.05 |
| Apr | 3.12 | 3.35 | -0.23 |
| May | 3.92 | 3.92 | 0.00 |
| Jun | 4.11 | 4.04 | 0.07 |
| Jul | 3.23 | 3.07 | 0.16 |
| Aug | 3.13 | 3.06 | 0.07 |
| Sep | 2.90 | 2.92 | -0.02 |
| Oct | 2.49 | 2.56 | -0.07 |
| Nov | 1.21 | 1.11 | 0.10 |
| Dec | 0.83 | 0.85 | -0.02 |
27.90 | 27.82 | 0.08 |