| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.35 | 0.35 | 0.00 |
| Feb | 0.53 | 0.56 | -0.03 |
| Mar | 1.07 | 1.06 | 0.01 |
| Apr | 2.12 | 2.20 | -0.08 |
| May | 3.15 | 3.18 | -0.03 |
| Jun | 3.29 | 3.38 | -0.09 |
| Jul | 3.46 | 3.45 | 0.01 |
| Aug | 2.84 | 2.98 | -0.14 |
| Sep | 1.64 | 1.62 | 0.02 |
| Oct | 1.62 | 1.67 | -0.05 |
| Nov | 0.78 | 0.76 | 0.02 |
| Dec | 0.52 | 0.58 | -0.06 |
21.37 | 21.79 | -0.42 |