| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.64 | 0.65 | -0.01 |
| Feb | 0.83 | 0.85 | -0.02 |
| Mar | 1.46 | 1.43 | 0.03 |
| Apr | 2.54 | 2.46 | 0.08 |
| May | 4.21 | 4.26 | -0.05 |
| Jun | 3.72 | 3.81 | -0.09 |
| Jul | 4.45 | 4.51 | -0.06 |
| Aug | 3.56 | 3.42 | 0.14 |
| Sep | 2.52 | 2.56 | -0.04 |
| Oct | 1.92 | 1.92 | 0.00 |
| Nov | 1.17 | 1.21 | -0.04 |
| Dec | 0.99 | 1.00 | -0.01 |
28.01 | 28.08 | -0.07 |