| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.43 | 0.42 | 0.01 |
| Feb | 0.70 | 0.69 | 0.01 |
| Mar | 1.07 | 1.05 | 0.02 |
| Apr | 2.23 | 2.28 | -0.05 |
| May | 3.68 | 3.69 | -0.01 |
| Jun | 3.43 | 3.21 | 0.22 |
| Jul | 3.45 | 3.32 | 0.13 |
| Aug | 2.35 | 2.41 | -0.06 |
| Sep | 1.64 | 1.53 | 0.11 |
| Oct | 1.46 | 1.48 | -0.02 |
| Nov | 0.56 | 0.60 | -0.04 |
| Dec | 0.50 | 0.48 | 0.02 |
21.50 | 21.16 | 0.34 |