| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 3.84 | 3.54 | 0.30 |
| Feb | 3.14 | 2.84 | 0.30 |
| Mar | 4.12 | 3.77 | 0.35 |
| Apr | 4.44 | 4.01 | 0.43 |
| May | 4.59 | 4.44 | 0.15 |
| Jun | 4.69 | 4.49 | 0.20 |
| Jul | 4.56 | 4.51 | 0.05 |
| Aug | 4.73 | 4.23 | 0.50 |
| Sep | 4.67 | 4.23 | 0.44 |
| Oct | 3.66 | 3.38 | 0.28 |
| Nov | 3.61 | 3.25 | 0.36 |
| Dec | 3.75 | 3.63 | 0.12 |
49.80 | 46.32 | 3.48 |