| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.38 | 0.38 | 0.00 |
| Feb | 0.50 | 0.55 | -0.05 |
| Mar | 1.02 | 1.01 | 0.01 |
| Apr | 2.13 | 2.12 | 0.01 |
| May | 3.02 | 3.04 | -0.02 |
| Jun | 3.22 | 3.09 | 0.13 |
| Jul | 3.44 | 3.36 | 0.08 |
| Aug | 3.00 | 2.95 | 0.05 |
| Sep | 1.58 | 1.56 | 0.02 |
| Oct | 1.56 | 1.54 | 0.02 |
| Nov | 0.74 | 0.69 | 0.05 |
| Dec | 0.54 | 0.56 | -0.02 |
21.13 | 20.85 | 0.28 |