| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 4.08 | 4.40 | -0.32 |
| Feb | 3.47 | 3.82 | -0.35 |
| Mar | 4.37 | 4.62 | -0.25 |
| Apr | 4.29 | 4.45 | -0.16 |
| May | 3.98 | 4.21 | -0.23 |
| Jun | 4.43 | 4.44 | -0.01 |
| Jul | 4.55 | 4.67 | -0.12 |
| Aug | 4.47 | 4.35 | 0.12 |
| Sep | 4.01 | 4.37 | -0.36 |
| Oct | 3.58 | 3.85 | -0.27 |
| Nov | 3.72 | 4.01 | -0.29 |
| Dec | 4.30 | 4.80 | -0.50 |
49.25 | 51.99 | -2.74 |