| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 3.60 | 3.75 | -0.15 |
| Feb | 3.02 | 3.11 | -0.09 |
| Mar | 4.36 | 4.25 | 0.11 |
| Apr | 3.73 | 3.81 | -0.08 |
| May | 3.90 | 3.72 | 0.18 |
| Jun | 4.08 | 4.08 | 0.00 |
| Jul | 4.25 | 4.15 | 0.10 |
| Aug | 4.64 | 4.75 | -0.11 |
| Sep | 3.88 | 3.82 | 0.06 |
| Oct | 4.04 | 4.19 | -0.15 |
| Nov | 3.35 | 3.40 | -0.05 |
| Dec | 4.35 | 4.57 | -0.22 |
47.20 | 47.60 | -0.40 |