| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 3.58 | 3.64 | -0.06 |
| Feb | 3.10 | 2.99 | 0.11 |
| Mar | 3.98 | 4.00 | -0.02 |
| Apr | 3.54 | 3.60 | -0.06 |
| May | 3.75 | 3.63 | 0.12 |
| Jun | 4.52 | 4.43 | 0.09 |
| Jul | 5.02 | 5.42 | -0.40 |
| Aug | 5.09 | 5.07 | 0.02 |
| Sep | 5.44 | 5.60 | -0.16 |
| Oct | 3.39 | 3.34 | 0.05 |
| Nov | 3.40 | 3.41 | -0.01 |
| Dec | 3.52 | 3.54 | -0.02 |
48.33 | 48.67 | -0.34 |