| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.71 | 0.67 | 0.04 |
| Feb | 0.79 | 0.77 | 0.02 |
| Mar | 1.44 | 1.38 | 0.06 |
| Apr | 2.51 | 2.53 | -0.02 |
| May | 3.68 | 3.58 | 0.10 |
| Jun | 4.40 | 4.43 | -0.03 |
| Jul | 4.32 | 4.47 | -0.15 |
| Aug | 3.91 | 3.94 | -0.03 |
| Sep | 3.11 | 3.00 | 0.11 |
| Oct | 2.83 | 2.81 | 0.02 |
| Nov | 1.43 | 1.43 | 0.00 |
| Dec | 0.93 | 1.00 | -0.07 |
30.06 | 30.01 | 0.05 |