| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.39 | 0.38 | 0.01 |
| Feb | 0.50 | 0.53 | -0.03 |
| Mar | 0.97 | 1.01 | -0.04 |
| Apr | 2.08 | 2.09 | -0.01 |
| May | 3.34 | 3.37 | -0.03 |
| Jun | 3.11 | 3.14 | -0.03 |
| Jul | 2.25 | 2.31 | -0.06 |
| Aug | 1.67 | 1.82 | -0.15 |
| Sep | 1.23 | 1.30 | -0.07 |
| Oct | 1.65 | 1.61 | 0.04 |
| Nov | 0.51 | 0.60 | -0.09 |
| Dec | 0.42 | 0.46 | -0.04 |
18.12 | 18.62 | -0.50 |