| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.40 | 0.43 | -0.03 |
| Feb | 0.56 | 0.59 | -0.03 |
| Mar | 1.15 | 1.14 | 0.01 |
| Apr | 2.07 | 1.99 | 0.08 |
| May | 3.26 | 3.27 | -0.01 |
| Jun | 2.94 | 2.85 | 0.09 |
| Jul | 3.57 | 3.74 | -0.17 |
| Aug | 3.02 | 3.01 | 0.01 |
| Sep | 1.83 | 1.67 | 0.16 |
| Oct | 1.73 | 1.68 | 0.05 |
| Nov | 0.74 | 0.73 | 0.01 |
| Dec | 0.57 | 0.66 | -0.09 |
21.84 | 21.76 | 0.08 |