| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.40 | 0.42 | -0.02 |
| Feb | 0.58 | 0.49 | 0.09 |
| Mar | 0.87 | 0.78 | 0.09 |
| Apr | 1.87 | 1.78 | 0.09 |
| May | 3.02 | 3.11 | -0.09 |
| Jun | 3.26 | 3.49 | -0.23 |
| Jul | 2.47 | 2.36 | 0.11 |
| Aug | 1.99 | 1.90 | 0.09 |
| Sep | 1.52 | 1.65 | -0.13 |
| Oct | 1.55 | 1.50 | 0.05 |
| Nov | 0.52 | 0.44 | 0.08 |
| Dec | 0.46 | 0.42 | 0.04 |
18.51 | 18.34 | 0.17 |