| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.43 | 0.40 | 0.03 |
| Feb | 0.44 | 0.43 | 0.01 |
| Mar | 1.09 | 1.03 | 0.06 |
| Apr | 1.52 | 1.55 | -0.03 |
| May | 2.30 | 2.42 | -0.12 |
| Jun | 3.01 | 2.88 | 0.13 |
| Jul | 3.04 | 3.07 | -0.03 |
| Aug | 2.94 | 2.88 | 0.06 |
| Sep | 1.21 | 1.30 | -0.09 |
| Oct | 1.51 | 1.53 | -0.02 |
| Nov | 0.57 | 0.56 | 0.01 |
| Dec | 0.54 | 0.64 | -0.10 |
18.60 | 18.69 | -0.09 |